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henry.voris
Joined: 02 Mar 2007
Posts: 116
Location: Pueo Field, Kula, Maui
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 Posted: Sat Feb 26, 2011 9:34 pm Post subject: Crank for 447 |
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25feb11
Fellow Kolbsters...
The time has arrived for me to replace the crank in my thundering 447. I have called the usual suspects looking for a re-built crank... After the guy on the other end of the line stops laughing and wipes the tears from his eyes, I'm informed that there is no such thing as a re-built crank... Verboten by Rotax...
As a new crank is more than $1K I was wondering if anyone knows of source for an illicit re-build??? I picture someone secretly pressing them together in some hidden valley next to his still and pakalolo patch.
Thanks in advance...
Attached are three photos shot yesterday... I borrowed a 152 from the flight school and flew the Lahaina Roads to see if the whales were still here...
Aloha,
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_________________
Henry
Firefly Five-Charlie-Bravo
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rmurrill(at)cox.net
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| Posted: Sat Feb 26, 2011 10:08 pm Post subject: Crank for 447 |
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Can't help with crank...but truly incredible photos....
---- "henry.voris" <henry_voris(at)yahoo.com> wrote:
| Quote: |
25feb11
Fellow Kolbsters...
The time has arrived for me to replace the crank in my thundering 447. I have called the usual suspects looking for a re-built crank... After the guy on the other end of the line stops laughing and wipes the tears from his eyes, I'm informed that there is no such thing as a re-built crank... Verboten by Rotax...
|
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kolb-List |
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rickofudall
Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
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| Posted: Sun Feb 27, 2011 7:42 am Post subject: Crank for 447 |
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Henry, IMHO if someone were to go to the trouble of disassembling the crank, measuring, metallurgical analysis, replacing bearings and reassembling AND do it in a manner that would give you the same service as a new crank AND charge a fair price to cover the cost of being an actual business, I think you'd be paying for a new crank made up of used parts. Consider what would happen if half way through the process one part of your crank is found to be unusable. Where would they get a replacement? Rotax doesn't have any part numbers for any of the crankshaft components except seals. Get a used part? There are no published service limits on these parts. No data to tell the rebuilder what the quality of fits between parts should be. If your crank is not a candidate for a rebuild you're surely not going to find that out for free. Now you have a bill for work performed, a pile of used parts and no crank, still.
Up to you. Too much guess work for me.
Rick Girard
On Sun, Feb 27, 2011 at 12:06 AM, <rmurrill(at)cox.net (rmurrill(at)cox.net)> wrote:
| Quote: | --> Kolb-List message posted by: <rmurrill(at)cox.net (rmurrill(at)cox.net)>
Can't help with crank...but truly incredible photos....
---- "henry.voris" <henry_voris(at)yahoo.com (henry_voris(at)yahoo.com)> wrote:
> --> Kolb-List message posted by: "henry.voris" <henry_voris(at)yahoo.com (henry_voris(at)yahoo.com)>
>
> 25feb11
>
> Fellow Kolbsters...
>
> The time has arrived for me to replace the crank in my thundering 447. I have called the usual suspects looking for a re-built crank... After the guy on the other end of the line stops laughing and wipes the tears from his eyes, I'm informed that there is no such thing as a re-built crank... Verboten by Rotax...
========================
arget="_blank">http://www.matronics.com/Navigator?Kolb-List
===========
http://forums.matronics.com
===========
le, List Admin.
="_blank">http://www.matronics.com/contribution
===========
|
--
Zulu Delta
Mk IIIC
Thanks, Homer GBYM
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- Groucho Marx
[quote][b]
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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The smallest miracle right in front of you is enough to make you happy.... |
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calvin(at)mlgc.com
Guest
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| Posted: Sun Feb 27, 2011 9:06 am Post subject: Crank for 447 |
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About your only choice is to contact a shop that does snowmobile repair and find out who does their machine work. They will be able to split the crank and fit new bearings. But only if you take them the crank and tell them its out of something other than a flying machine. Like say a small air boat or hovercraft.
At least thats my experiance.
Cal Anderson
[quote][b]
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Eugene Zimmerman
Joined: 10 Jan 2006
Posts: 392
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| Posted: Sun Feb 27, 2011 9:52 am Post subject: Crank for 447 |
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Henry,
There are several sources for rebuilt cranks. Central Snowmobile is one, and Steve Beatty of Airscrew Performance located in Glendale AZ.
Here are some of Steve's Barnstormer adds. I'd recommend you call Steve for a quote. He has been rebuilding rotax cranks for many years.
His add says ,,,,,, "The U.S. oldest certified Rotax crankshaft -engine overhaul center. (623) 842-3902, its our 31 th year."
Gene
ROTAX ENGINE CRANKSHAFTS SPARES & SERVICES OFFERED Airscrew Performance can rebuild , reseal or inspect your Rotax aircraft engine crankshaft , All 2 and 4 stroke Rotax crankshafts can be trued to factory specs. after a prop strike , you are not required to replace any Rotax crankshaft after sudden stoppage , But should be inspected . Trued or rebuilt , All rebuilt crankshafts have 6 months unlimited hr. warranty from start-up , call for more free info Steve (623) 842-3902 its our 29 year , thank you . Contact Steve Beatty - AIRSCREW PERFORMANCE, Owner - located Glendale, AZ USA Telephone: 623-842-3902 . Posted February 2, 2011 Show all Ads posted by this Advertiser Recommend This Ad to a Friend Email Advertiser Save to Watchlist Report This Ad View Larger Pictures Finance[img]cid:F6C43CDC-E314-4FE9-8A59-CA32710409B5[/img]
[img]cid:77077181-A5CA-47EF-BB89-A041A329523C[/img][img]cid:834B09E7-5FB3-4219-A358-CBE8271E9037[/img][img]cid:0397FD0F-E8CA-4E46-A1D5-EBFCAE2FEA21[/img][img]cid:77901236-D9A9-42CC-A4FA-5CF3E5BF1527[/img][img]cid:43EC397B-E01A-4222-9271-C7355290105E[/img]
ROTAX 28 HP TO 97 HORSEPOWER AIRCRAFT ENGINES AVAILABLE FOR SALE OR TRADE Rotax engines for aircraft , brand new , used, or rebuilt 28 TO 97 horsepower engines , Like the Rotax 583 engine for aircraft , this engine is completely stock and has 97 horsepower and we have sold 214 brand new ones of these , we also have several low time or rebuilt 277,377,447,503 ,582s and 583s including the 912 S , four strokes in stock with your choice of gearboxes and exhaust . We have been in the aircraft engine business for 29 years now . Many other engines , redrives and exhaust systems in stock, including at least 18 Brand new Rotax 277s , new Cuyuna 215 and 430s , Kawasakis ect , engine and crankshaft overhaul , Quick turnaround , genuine Rotax , Cuyuna and Kawasaki parts all in stock, We can also machine your 583 and 670 engines to install the gearboxes , In stock , tuned exhaust for the 583 still $ 388. , nothing else comes close, 97 horsepower , and up to 495 lbs of static thrust, call Steve at Airscrew Performance (623) 842-3902 Contact Steve Beatty - AIRSCREW PERFORMANCE located Glendale, AZ USA Telephone: 623-842-3902 . Posted February 2, 2011 Show all Ads posted by this Advertiser Recommend This Ad to a Friend Email Advertiser Save to Watchlist Report This Ad View Larger Pictures Finance[img]cid:F6C43CDC-E314-4FE9-8A59-CA32710409B5[/img]
[img]cid:F9BEA1E8-5C3B-4AD5-AC81-8C877D8A4F9C[/img][img]cid:ABF05FAC-0B4E-4C98-B4F6-9746EAD44731[/img][img]cid:80CEF531-0B58-42C2-A213-6D11EB89F6C3[/img][img]cid:6BF381DE-AB70-42A1-8185-01689E4E4DC8[/img][img]cid:59EB3865-C364-4538-98C5-2BCE63D02D7A[/img]
ENGINES , GEARBOXES , PARTS WE GOT JUST WHAT YOU WANT New, used, rebuilt engines, redrives and exhaust in stock, including redrives, gearboxes and belt drives for many other engines .Check out our Spring special (B) gearboxes all ratios $ 688. (C) all Ratios $ 1388. (E) all Ratios $ 1988 , Genuine Rotax electric starters $ 566. all Brand new ! new, used Rotax 277 engines in stock, 377 447 503 532 582 583 including 912 S , four stroke , Many other brand new and used engines and parts also in stock, including Cuyuna Kawasaki Solo Zenoah , ect. Electronic C.D.I. conversions for all Rotax point engines still $ 275. after more than 900 installed in past 14 yrs. Rotax engine, gearbox and crankshaft overhaul center, genuine Rotax parts all in stock. Quick turnaround, Six months, unlimited hr. warranty from startup. Don't let the new guy or part timer practice on your engine, and be sure he's putting genuine Rotax parts in your engine. The U.S. oldest certified Rotax crankshaft -engine overhaul center. (623) 842-3902, its our 31 th year. Contact Steve Beatty - AIRSCREW PERFORMANCE located Glendale, AZ USA Telephone: 623-842-3902 . Posted February 2, 2011 Show all Ads posted by this Advertiser Recommend This Ad to a Friend Email Advertiser Save to Watchlist Report This Ad View Larger Pictures Finance[img]cid:F6C43CDC-E314-4FE9-8A59-CA32710409B5[/img]
[img]cid:81A5594B-2122-479B-AD9F-64C4D7C64453[/img][img]cid:B38A33C8-8FBB-4303-9591-FBDC1A01EEAB[/img][img]cid:BAFEA01E-05C6-4D17-864C-C965B0EF5E13[/img][img]cid:57974D6C-E037-47E9-BED8-F126CFD9AC47[/img]
MUFFLERS , EXHAUST. BEST DEAL EVER! Brand new genuine Rotax aircraft mufflers , and exhaust , elbows and Y manifolds in stock , Mufflers all styles $ 488. retail $ 600+. Y manifolds all engines $ 188. retail is $ 225. elbows $ 144. retail is $ 174. Shipping is $ 18. per item in the US only . We are now selling the RAVE exhaust for your Rotax 583 engine We have sold this RAVE exhaust with at least 214 brand new Rotax 583 engines in the past 14 yrs. for use in aircraft, powered parachutes, Gyros and Trikes.This RAVE exhaust will produce at least 97 horsepower from your stock 583 engine and 75 to 77 HP from the 582. ContactSteve Beatty - AIRSCREW PERFORMANCE located Glendale, AZ USA Telephone: 623-842-3902 . Posted February 2, 2011 Show all Ads posted by this Advertiser Recommend This Ad to a Friend Email Advertiser Save to Watchlist Report This Ad View Larger Pictures Finance[img]cid:F6C43CDC-E314-4FE9-8A59-CA32710409B5[/img]
On Feb 27, 2011, at 12:34 AM, henry.voris wrote:
| Quote: | --> Kolb-List message posted by: "henry.voris" <henry_voris(at)yahoo.com (henry_voris(at)yahoo.com)>
25feb11
Fellow Kolbsters...
The time has arrived for me to replace the crank in my thundering 447. I have called the usual suspects looking for a re-built crank... After the guy on the other end of the line stops laughing and wipes the tears from his eyes, I'm informed that there is no such thing as a re-built crank... Verboten by Rotax...
As a new crank is more than $1K I was wondering if anyone knows of source for an illicit re-build??? I picture someone secretly pressing them together in some hidden valley next to his still and pakalolo patch.
Thanks in advance...
Attached are three photos shot yesterday... I borrowed a 152 from the flight school and flew the Lahaina Roads to see if the whales were still here...
Aloha,
--------
Henry
Firefly Five-Charlie-Bravo
Do Not Archive
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=332188#332188
Attachments:
http://forums.matronics.com//files/e_pod_185.jpg
http://forums.matronics.com//files/eequalwhales_4_119.jpg
http://forums.matronics.com --> &n========================<b - &nbs --> ========================
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ulflyer(at)verizon.net
Guest
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| Posted: Sun Feb 27, 2011 7:58 pm Post subject: Crank for 447 |
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The thought I always have about using a used (rebuilt) crank is one taken from one engine which you have no history knowledge of and put in your engine of which you know how it's been run and treated. Maybe it just me, but I don't see how any one can recondition a crank in their typical shop or garage and be as reliable as the original.
jerb
At 09:27 AM 2/27/2011, you wrote:
[quote]Henry, IMHO if someone were to go to the trouble of disassembling the crank, measuring, metallurgical analysis, replacing bearings and reassembling AND do it in a manner that would give you the same service as a new crank AND charge a fair price to cover the cost of being an actual business, I think you'd be paying for a new crank made up of used parts.
Consider what would happen if half way through the process one part of your crank is found to be unusable. Where would they get a replacement? Rotax doesn't have any part numbers for any of the crankshaft components except seals. Get a used part? There are no published service limits on these parts. No data to tell the rebuilder what the quality of fits between parts should be. If your crank is not a candidate for a rebuild you're surely not going to find that out for free. Now you have a bill for work performed, a pile of used parts and no crank, still.
Up to you. Too much guess work for me.
Rick Girard
On Sun, Feb 27, 2011 at 12:06 AM, <rmurrill(at)cox.net (rmurrill(at)cox.net)> wrote:
--> Kolb-List message posted by: <rmurrill(at)cox.net (rmurrill(at)cox.net)>
Can't help with crank...but truly incredible photos....
---- "henry.voris" <henry_voris(at)yahoo.com (henry_voris(at)yahoo.com)> wrote:
> --> Kolb-List message posted by: "henry.voris" <henry_voris(at)yahoo.com (henry_voris(at)yahoo.com) >
>
> 25feb11
>
> Fellow Kolbsters...
>
> The time has arrived for me to replace the crank in my thundering 447. I have called the usual suspects looking for a re-built crank... After the guy on the other end of the line stops laughing and wipes the tears from his eyes, I'm informed that there is no such thing as a re-built crank... Verboten by Rotax...
========================
arget="_blank">http://www.matronics.com/Navigator?Kolb-List
===========
http://forums.matronics.com
===========
le, List Admin.
="_blank">http://www.matronics.com/contribution
===========
--
Zulu Delta
Mk IIIC
Thanks, Homer GBYM
It isn't necessary to have relatives in Kansas City in order to be unhappy.
- Groucho Marx
[b]
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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ulflyer(at)verizon.net
Guest
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| Posted: Sun Feb 27, 2011 8:06 pm Post subject: Crank for 447 |
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If they replace your crank with a new one what happens to the old crank, is it sellable to one of the crank rebuilders? How much could you get for the old core? Next do they play the game with you where they try to claim there is a core charge for the old crank and it has to be sent back or you get change so much more.
What's going rate for a new crank for 447?
jerb
At 11:45 AM 2/27/2011, you wrote:
| Quote: | Henry,
There are several sources for rebuilt cranks. Central Snowmobile is one, and Steve Beatty of Airscrew Performance located in Glendale AZ.
Here are some of Steve's Barnstormer adds. I'd recommend you call Steve for a quote. He has been rebuilding rotax cranks for many years.
His add says ,,,,,, "The U.S. oldest certified Rotax crankshaft -engine overhaul center. (623) 842-3902, its our 31 th year."
Gene
ROTAX ENGINE CRANKSHAFTS SPARES & SERVICES OFFERED Airscrew Performance can rebuild , reseal or inspect your Rotax aircraft engine crankshaft , All 2 and 4 stroke Rotax crankshafts can be trued to factory specs. after a prop strike , you are not required to replace any Rotax crankshaft after sudden stoppage , But should be inspected . Trued or rebuilt , All rebuilt crankshafts have 6 months unlimited hr. warranty from start-up , call for more free info Steve (623) 842-3902 its our 29 year , thank you . Contact Steve Beatty - AIRSCREW PERFORMANCE, Owner - located Glendale, AZ USA Telephone: 623-842-3902 . Posted February 2, 2011 Show all Ads posted by this Advertiser Recommend This Ad to a Friend Email Advertiser Save to Watchlist Report This Ad View Larger Pictures Finance
[img]cid:7.1.0.9.2.20110227215716.06965b48(at)verizon.net.15[/img] [img]cid:7.1.0.9.2.20110227215716.06965b48(at)verizon.net.16[/img] [img]cid:7.1.0.9.2.20110227215716.06965b48(at)verizon.net.17[/img] [img]cid:7.1.0.9.2.20110227215716.06965b48(at)verizon.net.18[/img] [img]cid:7.1.0.9.2.20110227215716.06965b48(at)verizon.net.19[/img]
ROTAX 28 HP TO 97 HORSEPOWER AIRCRAFT ENGINES AVAILABLE FOR SALE OR TRADE Rotax engines for aircraft , brand new , used, or rebuilt 28 TO 97 horsepower engines , Like the Rotax 583 engine for aircraft , this engine is completely stock and has 97 horsepower and we have sold 214 brand new ones of these , we also have several low time or rebuilt 277,377,447,503 ,582s and 583s including the 912 S , four strokes in stock with your choice of gearboxes and exhaust . We have been in the aircraft engine business for 29 years now . Many other engines , redrives and exhaust systems in stock, including at least 18 Brand new Rotax 277s , new Cuyuna 215 and 430s , Kawasakis ect , engine and crankshaft overhaul , Quick turnaround , genuine Rotax , Cuyuna and Kawasaki parts all in stock, We can also machine your 583 and 670 engines to install the gearboxes , In stock , tuned exhaust for the 583 still $ 388. , nothing else comes close, 97 horsepower , and up to 495 lbs of static thrust, call Steve at Airscrew Performance (623) 842-3902 Contact Steve Beatty - AIRSCREW PERFORMANCE located Glendale, AZ USA Telephone: 623-842-3902 . Posted February 2, 2011 Show all Ads posted by this Advertiser Recommend This Ad to a Friend Email Advertiser Save to Watchlist Report This Ad View Larger Pictures Finance
[img]cid:7.1.0.9.2.20110227215716.06965b48(at)verizon.net.20[/img] [img]cid:7.1.0.9.2.20110227215716.06965b48(at)verizon.net.21[/img] [img]cid:7.1.0.9.2.20110227215716.06965b48(at)verizon.net.22[/img] [img]cid:7.1.0.9.2.20110227215716.06965b48(at)verizon.net.23[/img] [img]cid:7.1.0.9.2.20110227215716.06965b48(at)verizon.net.24[/img]
ENGINES , GEARBOXES , PARTS WE GOT JUST WHAT YOU WANT New, used, rebuilt engines, redrives and exhaust in stock, including redrives, gearboxes and belt drives for many other engines .Check out our Spring special (B) gearboxes all ratios $ 688. (C) all Ratios $ 1388. (E) all Ratios $ 1988 , Genuine Rotax electric starters $ 566. all Brand new ! new, used Rotax 277 engines in stock, 377 447 503 532 582 583 including 912 S , four stroke , Many other brand new and used engines and parts also in stock, including Cuyuna Kawasaki Solo Zenoah , ect. Electronic C.D.I. conversions for all Rotax point engines still $ 275. after more than 900 installed in past 14 yrs. Rotax engine, gearbox and crankshaft overhaul center, genuine Rotax parts all in stock. Quick turnaround, Six months, unlimited hr. warranty from startup. Don't let the new guy or part timer practice on your engine, and be sure he's putting genuine Rotax parts in your engine. The U.S. oldest certified Rotax crankshaft -engine overhaul center. (623) 842-3902, its our 31 th year. Contact Steve Beatty - AIRSCREW PERFORMANCE located Glendale, AZ USA Telephone: 623-842-3902 . Posted February 2, 2011 Show all Ads posted by this Advertiser Recommend This Ad to a Friend Email Advertiser Save to Watchlist Report This Ad View Larger Pictures Finance
[img]cid:7.1.0.9.2.20110227215716.06965b48(at)verizon.net.25[/img] [img]cid:7.1.0.9.2.20110227215716.06965b48(at)verizon.net.26[/img] [img]cid:7.1.0.9.2.20110227215716.06965b48(at)verizon.net.27[/img] [img]cid:7.1.0.9.2.20110227215716.06965b48(at)verizon.net.28[/img]
MUFFLERS , EXHAUST. BEST DEAL EVER! Brand new genuine Rotax aircraft mufflers , and exhaust , elbows and Y manifolds in stock , Mufflers all styles $ 488. retail $ 600+. Y manifolds all engines $ 188. retail is $ 225. elbows $ 144. retail is $ 174. Shipping is $ 18. per item in the US only . We are now selling the RAVE exhaust for your Rotax 583 engine We have sold this RAVE exhaust with at least 214 brand new Rotax 583 engines in the past 14 yrs. for use in aircraft, powered parachutes, Gyros and Trikes.This RAVE exhaust will produce at least 97 horsepower from your stock 583 engine and 75 to 77 HP from the 582. Contact Steve Beatty - AIRSCREW PERFORMANCE located Glendale, AZ USA Telephone: 623-842-3902 . Posted February 2, 2011 Show all Ads posted by this Advertiser Recommend This Ad to a Friend Email Advertiser Save to Watchlist Report This Ad View Larger Pictures Finance
On Feb 27, 2011, at 12:34 AM, henry.voris wrote:
| Quote: | --> Kolb-List message posted by: "henry.voris" <henry_voris(at)yahoo.com (henry_voris(at)yahoo.com) >
25feb11
Fellow Kolbsters...
The time has arrived for me to replace the crank in my thundering 447. I have called the usual suspects looking for a re-built crank... After the guy on the other end of the line stops laughing and wipes the tears from his eyes, I'm informed that there is no such thing as a re-built crank... Verboten by Rotax...
As a new crank is more than $1K I was wondering if anyone knows of source for an illicit re-build??? I picture someone secretly pressing them together in some hidden valley next to his still and pakalolo patch.
Thanks in advance...
Attached are three photos shot yesterday... I borrowed a 152 from the flight school and flew the Lahaina Roads to see if the whales were still here...
Aloha,
--------
Henry
Firefly Five-Charlie-Bravo
Do Not Archive
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=332188#332188
Attachments:
http://forums.matronics.com//files/e_pod_185.jpg
http://forums.matronics.com//files/eequalwhales_4_119.jpg
[url=http://forums.matronics.com /] http://forums.matronics.com [/url] --> &n========================
|
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aoldman(at)xtra.co.nz
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| Posted: Sun Feb 27, 2011 10:40 pm Post subject: Crank for 447 |
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Many years ago I had a 503 crank split and replaced the bearings with proper Rotax bearings. That engine was still performing well 800hr later . I lost track of its ownership after that .It ran well and gave no problems.
The crank was split and re assembled by a motor cycle repair work shop that worked on large two stroke motor cycles . The work shop costs were not that bad, the big cost was the rotax bearings . Still worked out about half the cost of replacing the crank with a new one .
Regards all
Downunder { the shaky South Island of New Zealand }
MK111c
Stay safe up there
[quote][b]
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wrk2win4u(at)msn.com
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| Posted: Mon Feb 28, 2011 6:14 am Post subject: Crank for 447 |
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<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
Greetings,
I am coming up on my 300 hour TBO of my Rotax 503 DCDI. I have 24 hours to go. I likewise have wondered about the Rotax requirement of replacing the crank. I have talked with Green Sky Adventures and Air Wolf of CA. Each of them have responded that it is a requirement to replace the crank at 300 hours. I have talked with some Rotax 503 owners who have told me the crank will last a lot longer than the 300 hours suggested by Rotax. Many owner/rebuilders say the crank condition is the key to replacement or continued use. Many variables add to the total picture such as oil used, mixture, moisture conditions during storage etc. My questions are; Is the 300 hour replacement requirement a liability demand or is replacing the crank a safety issue? Should I just replace it and not consider leaving it in the plane?
Also, Thanks Boyd for the help with the toe-in / toe-out problem.
Kurt
<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />Utah
FS2
From: aoldman(at)xtra.co.nz
To: kolb-list(at)matronics.com
Subject: Re: Kolb-List: Crank for 447
Date: Mon, 28 Feb 2011 19:37:58 +1300
Many years ago I had a 503 crank split and replaced the bearings with proper Rotax bearings. That engine was still performing well 800hr later . I lost track of its ownership after that .It ran well and gave no problems.
The crank was split and re assembled by a motor cycle repair work shop that worked on large two stroke motor cycles .. The work shop costs were not that bad, the big cost was the rotax bearings . Still worked out about half the cost of replacing the crank with a new one ..
Regards all
Downunder { the shaky South Island of New Zealand }
MK111c
Stay safe up there
[quote]
arget=_blank>http://www.matronics.com/Navigator?Kolb-List
ttp://forums.matronics.com
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[b]
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Eugene Zimmerman
Joined: 10 Jan 2006
Posts: 392
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| Posted: Mon Feb 28, 2011 6:24 am Post subject: Crank for 447 |
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Jerb,
If you are uncomfortable with "rebuilt" then stick with new.
It is a known fact that "SOMETIMES" rebuilt, or after market, is actually better than new. I really have no dog in this race either way.
I was merely sharing information. It is strictly a personal choice.
For one person, the most bang for the buck is the decisive issue, and for another person it is the confidence associated with name brand.
Your choice.
Gene,
On Feb 27, 2011, at 11:02 PM, jerb wrote:
| Quote: | If they replace your crank with a new one what happens to the old crank, is it sellable to one of the crank rebuilders? How much could you get for the old core? Next do they play the game with you where they try to claim there is a core charge for the old crank and it has to be sent back or you get change so much more.
What's going rate for a new crank for 447?
jerb
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Eugene Zimmerman
Joined: 10 Jan 2006
Posts: 392
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| Posted: Mon Feb 28, 2011 6:44 am Post subject: Crank for 447 |
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Kurt,It is strictly a risk management decision. It is possible for a crankshaft to fail anytime after it is put into service. Some cranks have failed in only few hours and others have been running flawlessly over 1500 hrs. Typically failure rates increase with time. Rotax is comfortable with the risk levels for their crankshafts up to 300 hrs. for aircraft application of their 503 engines.
What you should do, only you can decide. Keep in mind that risk is UNAVOIDABLE, and it is YOUR risk that you are actually managing, not rotax's risks.
Gene
On Feb 28, 2011, at 9:12 AM, K I wrote:
| Quote: | Greetings,
I am coming up on my 300 hour TBO of my Rotax 503 DCDI. I have 24 hours to go. I likewise have wondered about the Rotax requirement of replacing the crank. I have talked with Green Sky Adventures and Air Wolf of CA. Each of them have responded that it is a requirement to replace the crank at 300 hours. I have talked with some Rotax 503 owners who have told me the crank will last a lot longer than the 300 hours suggested by Rotax. Many owner/rebuilders say the crank condition is the key to replacement or continued use. Many variables add to the total picture such as oil used, mixture, moisture conditions during storage etc. My questions are; Is the 300 hour replacement requirement a liability demand or is replacing the crank a safety issue? Should I just replace it and not consider leaving it in the plane?
Also, Thanks Boyd for the help with the toe-in / toe-out problem.
Kurt
Utah
FS2
From: aoldman(at)xtra.co.nz (aoldman(at)xtra.co.nz)
To: kolb-list(at)matronics.com (kolb-list(at)matronics.com)
Subject: Re: Crank for 447
Date: Mon, 28 Feb 2011 19:37:58 +1300
Many years ago I had a 503 crank split and replaced the bearings with proper Rotax bearings. That engine was still performing well 800hr later . I lost track of its ownership after that .It ran well and gave no problems.
The crank was split and re assembled by a motor cycle repair work shop that worked on large two stroke motor cycles .. The work shop costs were not that bad, the big cost was the rotax bearings . Still worked out about half the cost of replacing the crank with a new one .
Regards all
Downunder { the shaky South Island of New Zealand }
MK111c
Stay safe up there
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arget=_blank>http://www.matronics.com/Navigator?Kolb-List
ttp://forums.matronics.com
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href="http://www.matronics.com/Navigator?Kolb-List">http://www.matronics.com/Navigator?Kolb-List
href="http://forums.matronics.com/">http://forums.matronics.com
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[quote][b]
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henry.voris
Joined: 02 Mar 2007
Posts: 116
Location: Pueo Field, Kula, Maui
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| Posted: Mon Feb 28, 2011 4:43 pm Post subject: Re: Crank for 447 |
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26feb11
Fellow Kolbsters,
As always this list is the best source of information, thanks.
Called Steve at AIRSCREW PERFORMANCE... Sez he'll do the deed for $788, delivered back to me, 6 months unlimited hr. warranty from start-up. Figures about a week turn around...
Surprising how many "off list" messages I received urging me to consider using the snowmobile crank... All the snowmobile shops here on Maui are so jammed they can't take the time to talk to me, so I'll have to research sources on the net.
I'll keep you guys informed as to what I do & how it turns out.
Kurt, I'm not replacing the crank because it hit 300 hours... I'm replacing because I screwed up the engine bad. Mea Culpa. IMHO TBO = Cover My Ass... Remember that when you read my obit...
Aloha,
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Henry
Firefly Five-Charlie-Bravo
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