YS 91AC idle

[rcpilotjohn at comcast.net]

Paul,

Sounds to me like it may be a little rich now that the regulator has been replaced. If you had an air leak it would tend to lean the idle. With the rich idle it would slow down and eventually die, with the glow plugged back in it should suck more air to compensate.
Course that is just a guess, but you might try leaning the idle a little.
John

-------------- Original message -------------- 

> I have an idle problem with my YS 91 AC. Start the engine, remove the glow 
> battery, go to full throttle (after waiting for the 
> tank to get pressurized) come back to idle : I get about 2000 rpm but it does 
> tend to slow down. If I put the glow battery IT 
> SPEEDS UP SLOWLY TO 3000 RPM ! 
> Take the battery off, and it will very slowly go back to about 2000 ! 
> I have replaced the regulator (don't remember having this problem before 
> that) because the top end varied by 200 - 300 rpm. 
> That seems ok now. 
> The idle problem is the same with my old OS FS plug and new YS plug, so its 
> not the plug. The fuel is Powermaster 20 20. 
> Any ideas (besides buy a YS 110) ? 
> Thanks, 
> Paul 
> 
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