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Diameter of 912 oil hose and oil hose type

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christoph.both(at)acadiau
Guest

Posted: Fri Nov 25, 2011 7:56 am Post subject: Diameter of 912 oil hose and oil hose type

Hello Europa builders: 

The 912 installation manual specifies a 12-millimeter oil hose connecting the Rotax to the oil cooler/rotax external oil pan. 12mm hose is hard to get in  North America/Canada. Â½ inch hose is just a bit wider ID, so my question is, taking into account the considerable oil pressure on start up exceeding 100psi, if Â½ inch hose is fine â€“ of course, properly secured with clamps. I have a CLASSIC engine installation  and am concerned that oil hose directly located above the muffler which, if oil starts dripping is an issue with potentially starting a fire. 

Question #2 then is: which hose type exactly? With the oil sump exit located directly above the HOT muffler, at a close distance of less than 1 inch my preferred  selection of hose would be stainless steel braided high pressure/high temperature product. Weight and not too large OD is an issue as well (5 feet will be used for the entire circuit). I have identified Aeroquip 601-8 with SS outer as the most likely product  ($20/foot from Aircraft Spruce) but before I place an order I like to hear your opinion. 

Thanks, 

Christoph Both 

#223 Wolfville, Nova Scotia, Canada 

EUROPA Classic Rotax 912S Woodcomp SR 3000, 2-blade, in perpetual state of completionâ€¦.

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frans(at)privatepilots.nl
Guest

Posted: Fri Nov 25, 2011 10:08 am Post subject: Diameter of 912 oil hose and oil hose type

On 11/25/2011 04:53 PM, Christoph Both wrote:



 	  Quote: 	
		   Question #2 then is: which hose type exactly? With the oil sump exit


	


Take a look at:

https://www.pegasusautoracing.com/group.asp?GroupID=PLUMANFLEX



I used these hoses in my Europa and they served me well. Very light 

weight, flexible and durable. Make sure to get the associated hose ends, 

these hoses are not suitable for standard hose clamps.



Frans

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neveyre(at)aol.co.uk
Guest

Posted: Fri Nov 25, 2011 10:59 am Post subject: Diameter of 912 oil hose and oil hose type

Hi Christoph,

   The oil lines in the circuit do not see the pressure you see on the gauge,that stays within the engine, the line from the tank via the cooler to the pump inlet sees SUCTION, the return line from the crankcase sees just above atmospheric [ crankcase pressure] so you don't need fancy high pressure hoses, but it does need to be oil resistant, and firm enough to not collapse under suction. Try Jap or German Auto parts outlets, they will have hose in that horrible foriegn measurement size ! Go for a ''name'' Brand, ie Goodyear, Pirelli, Conti and you won't be far wrong.

   I sleeve ALL fuel and oil lines in either / both Firesleeve [ the red rubbery glass lined stuff], or the silver foil covered glass sleeve, ACS or ''Boy Racer'' Auto stores for those.

 Rather than the ''Jubilee'' worm drive clamps which have a stiff straight part on them that won't conform to the hose, I go for the ones with a ''swivel'' nut and bolt that keeps a constant curve to the clamp circumference, they also have a flared rim that prevents them digging in to the hose, more expensive than Jubilee's, cheaper than the fancy [ and unnecessary] Aeroquip sort.

   Cheers ,

   Nev 

 

 

   --

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christoph.both(at)acadiau
Guest

Posted: Fri Nov 25, 2011 11:37 am Post subject: Diameter of 912 oil hose and oil hose type

Hi Nev, 

Thank you very much for your time. I will heed your advice (as in the past!).  

Thanks, 

Christoph 

  

   

From: owner-europa-list-server(at)matronics.com [mailto:owner-europa-list-server(at)matronics.com] On Behalf Of Neville Eyre

 Sent: Friday, November 25, 2011 2:56 PM

 To: europa-list(at)matronics.com

 Subject: Re: Europa-List: Diameter of 912 oil hose and oil hose type 

 

   

Hi Christoph, 

  

The oil lines in the circuit do not see the pressure you see on the gauge,that stays within the engine, the line from the tank via the cooler to the pump inlet  sees SUCTION, the return line from the crankcase sees just above atmospheric [ crankcase pressure] so you don't need fancy high pressure hoses, but it does need to be oil resistant, and firm enough to not collapse under suction. Try Jap or German Auto parts  outlets, they will have hose in that horrible foriegn measurement size ! Go for a ''name'' Brand, ie Goodyear, Pirelli, Conti and you won't be far wrong. 

  

I sleeve ALL fuel and oil lines in either / both Firesleeve [ the red rubbery glass lined stuff], or the silver foil covered glass sleeve, ACS or ''Boy Racer''  Auto stores for those.

 Rather than the ''Jubilee'' worm drive clamps which have a stiff straight part on them that won't conform to the hose, I go for the ones with a ''swivel'' nut and bolt that keeps a constant curve to the clamp circumference, they also have a flared rim that  prevents them digging in to the hose, more expensive than Jubilee's, cheaper than the fancy [ and unnecessary] Aeroquip sort. 

  

Cheers , 

  

Nev  

  

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neveyre(at)aol.co.uk
Guest

Posted: Sun Nov 27, 2011 6:18 pm Post subject: Diameter of 912 oil hose and oil hose type

Hi Guys,

   Duncan kindly remined me I didn't mention temperature specification in my last post, thanks Duncan, I trust builders won't go to B&Q or Walmart for their hose, go to a Race Auto shop [Think Automotive or similar outlet], don't trust the Clerk, refer to the Manufacturers Spec' Sheet to see the hose is both Oil and Temp suitable.See what racers are using on their Subaru WRX's and Mitsubushi EVO's and the like ?   

   What I was [ poorly] trying to say is fancy Teflon / Stainless lines are not needed , and in fact difficult to hook up to the Rotax tank and motor connections with the Aeroquip / Earls type fittings and too stiff to run in the limited space easily.. [ and at Â£25 / $35 + an end !]

   Cheers,

   Nev.

 

 

 

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christoph.both(at)acadiau
Guest

Posted: Sun Nov 27, 2011 7:27 pm Post subject: Diameter of 912 oil hose and oil hose type

Nev, 

Thanks again for clarification. In addition to the rubber hose you recommend FireSleeve as well, right? 

If such a good hose could be found â€“ would Â½ inch be OK? I am having great difficulty sourcing 12mm oil/high temp hose in the local auto part stores in Canada.  Â½ inch is a bit wider and I donâ€™t like seeping oil lines, especially in the CLASSIC installation where everything in reach drips on the hot exhaust. Firesleeve is no problem, I can get it from Aircraft Spruce. 

Your thoughts? 

Christoph 

  

   

From: owner-europa-list-server(at)matronics.com [mailto:owner-europa-list-server(at)matronics.com] On Behalf Of Neville Eyre

 Sent: Sunday, November 27, 2011 10:15 PM

 To: europa-list(at)matronics.com

 Subject: Re: Europa-List: Diameter of 912 oil hose and oil hose type 

 

   

Hi Guys, 

  

Duncan kindly remined me I didn't mention temperature specification in my last post, thanks Duncan, I trust builders won't go to B&Q or Walmart for their hose,  go to a Race Auto shop [Think Automotive or similar outlet], don't trust the Clerk, refer to the Manufacturers Spec' Sheet to see the hose is both Oil and Temp suitable.See what racers are using on their Subaru WRX's and Mitsubushi EVO's and the like ?    

  

What I was [ poorly] trying to say is fancy Teflon / Stainless lines are not needed , and in fact difficult to hook up to the Rotax tank and motor connections with  the Aeroquip / Earls type fittings and too stiff to run in the limited space easily.. [ and at Â£25 / $35 + an end !] 

  

Cheers, 

  

Nev.

 

  

  

--

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frans(at)privatepilots.nl
Guest

Posted: Mon Nov 28, 2011 12:49 am Post subject: Diameter of 912 oil hose and oil hose type

On 11/28/2011 03:15 AM, Neville Eyre wrote:

 	  Quote: 	
		   What I was [ poorly] trying to say is fancy Teflon / Stainless lines are

 not needed , and in fact difficult to hook up to the Rotax tank and

 motor connections with the Aeroquip / Earls type fittings and too stiff

 to run in the limited space easily.. [ and at Â£25 / $35 + an end !]


	


The link a gave earlier in this thread points to a hose that is light 

weight, very flexible, and able to handle high temperatures.



Rubber hoses age and need to be replaced at least every five years, are 

heavy, and not tolerant of very high temperatures. Normally you wouldn't 

need the additional protection of a "fancy" hose, but what if you have a 

crack in the exhaust and the resulting plume heats up the hose, or 

something breaks loose in the engine compartment (I once had a factory 

drip tray fall off during flight) and abbrases the oil hose?



I have been flying with the standard rubber hoses and barb fittings, but 

when I took them off after one year I was glad I did so (one hose had 

softened considerably and had became a bit sticky) and I feel much more 

comfortable with my new "fancy" hoses. 



Frans

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christoph.both(at)acadiau
Guest

Posted: Tue Nov 29, 2011 7:13 am Post subject: Diameter of 912 oil hose and oil hose type

Hi Frans,

Thanks for your thoughts.

I ended up calling Rotax Canada - they had the right hose and the firesleeves, at quite a reasonable price. Lesson learned - ask Rotax first, then fan out.

Thanks to all those taking the time to address my question. 

Christoph



Europa TRI CLASSIC 912S, SR3000-2 blade prop, in final assembly after 16 years of slow building...



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