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RCV 91CD idle problem

Old 06-06-2013, 08:55 AM
Steve S. Helland
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Default RCV 91CD idle problem

Dear RCV,
My RCV 91CD engine has an idle needle problem. It unscrews itself during flight making the idle blubber and quit during landings. I tune it perfectly before each flight but every time I have to re-tune it before flying again. I think the low idle needle needs a new O-RING. Since this engine is cowled AND powering a float plane makes my problem with this engine a real pain in the butt because I have to go swimming each time for one thing to retrieve my plane, then remove the cowling to adjust low needle. HELP!

Since O-RINGS are commercially available can you please advise me as to what size (ID/OD/Guage) I should purchase to replace it with? I don't think sending in the engine should be required.
Engine purchased privatley NIB on RCU in 2008.
Has less than 1 gallon ran through it.
Has hung from cieling more than flown-hangar queen.
Goldberg Cub on floats-14X6 prop.
Du-Bro anti vibe 4 cycle engine mount

I would fly it more if this problem was resolved.
First noticed idle needle anomaly 3 years ago and have been putting up with this problem for a long time. I want to fix it.
Old 06-06-2013, 09:17 AM
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Default RE: RCV 91CD idle problem

You might want to contact Bill Jensen at B.J.'s Model Engine Service.He is the authorized service dealer for RCV engines in the USA and may even have what you are looking for in stock. Here is the link to his web site

Good luck....

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