 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
dougsnash
Joined: 14 Apr 2008
Posts: 281
|
 Posted: Thu Dec 02, 2010 5:14 am Post subject: Problem solved. Rough |
 |
|
Ah, Johann, the plot thickens. The air filter servicing could explain some things.
If your friend just re-oiled his K&N air filter, it is possible that he over-oiled the filter medium thus choking off the air flow to the engine. Since the engine uses unfiltered air for carb heat, carb heat would bypass the clogged with oil air filter and allow his engine to run properly when selected.
I haven't seen this situation occur on a 912 but have done it myself on a 503. Is it possible that while you've been troubleshooting this issue, the oil has soaked in/dripped off the filter medium enough that proper air flow through the filter has returned?
Just one more thing to think about.
Doug MacDonald
CH-701 C-GBQX
NW Ontario, Canada
| Quote: | Time: 09:25:27 AM PST US
From: =?ISO-8859-1?Q?J=F3hann_J=F3hannsson?= <joeing701(at)simnet.is>
Subject: Re: Re: Problem solved. Rough
running cured with carb
heater
Air cleaner has
been cleaned with K&N cleaning kit according to the
manual. The air
|
| Quote: | Thanks again,
Johann G.
|
| | - The Matronics RotaxEngines-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?RotaxEngines-List |
|
|
|
| Back to top |
|
 |
joeing701(at)simnet.is
Guest
|
| Posted: Thu Dec 02, 2010 6:02 am Post subject: Problem solved. Rough |
|
|
Hello Doug.
Thank you for that suggestion. We have tried to disconnect the air hose from the carbs completly with no avail. Same rough running in the mid range. If the situation was a fuel starvation from the tanks or the fuel delivery, the problems should also be noticed in the highest rpm when fuel is coming through the main jet, but that is not the case. Normal running there, it is just the mid range which has been cured with the richer/larger needle jet. As mentioned in Rogers post regarding hard start, Rotax reccomend that you change the jetting in the carb for colder season and then replace with the standard reccomended jetting for the sommer time.
My friend did not use much oil on his filter, and by eliminating the filter proofs that there is no problem with the air flow to the carbs.
Still wondering.
Johann G.
Iceland.
----- Upprunalegt skeyti -----
Frá: "MacDonald Doug" <dougsnash(at)yahoo.com>
Til: rotaxengines-list(at)matronics.com
Sent: Fimmtudagur, 2. desember, 2010 13:12:03 GMT +00:00 Monrovia
Efni: Re: Problem solved. Rough
Ah, Johann, the plot thickens. The air filter servicing could explain some things.
If your friend just re-oiled his K&N air filter, it is possible that he over-oiled the filter medium thus choking off the air flow to the engine. Since the engine uses unfiltered air for carb heat, carb heat would bypass the clogged with oil air filter and allow his engine to run properly when selected.
I haven't seen this situation occur on a 912 but have done it myself on a 503. Is it possible that while you've been troubleshooting this issue, the oil has soaked in/dripped off the filter medium enough that proper air flow through the filter has returned?
Just one more thing to think about.
Doug MacDonald
CH-701 C-GBQX
NW Ontario, Canada
| Quote: | Time: 09:25:27 AM PST US
From: =?ISO-8859-1?Q?J=F3hann_J=F3hannsson?= <joeing701(at)simnet.is>
Subject: Re: Re: Problem solved. Rough
running cured with carb
heater
Air cleaner hasÂ
been cleaned with K&N cleaning kit according to the
manual. The airÂ
|
| Quote: | Thanks again,
Johann G.
|
| | - The Matronics RotaxEngines-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?RotaxEngines-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
