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Re: REFLECTOR: Lyco 540 probs

What is the prop arrangement?


James K. Glindemann

> From: John Robarge <johnr@livingston.com>
> To: reflector@awpi.com
> Subject: REFLECTOR: Lyco 540 probs
> Date: Wednesday, September 23, 1998 4:34 AM
> I have a consistent problem with the Lyco 540 installed in my XL.  At low
> power settings, it surges from 600-1200rpm randomly and roughly with an
> apparent cycle of about a second.  At high power, it runs great, very
> and all other indications normal.  It has been suggested that it might be
> the close confines of the cowl not allowing the engine to cool properly. 
> don't buy it because the guages say it is a cool as a cucumber.  Others
> it is the mixture and I should get it re-calibrated.  This might be, but
> adjusting the mixture has no effect.  Still others say it might be the
> engine driven fuel pump, but again, the guages say I have excellent fuel
> pressure.  The flow meter indicates very smooth flow at higher RPMs, but
> low RPMs the flow obviously changes with the surge.  I can't tell if the
> flow change happens before the RPM change or the other way around.
> If anyone has experience with this problem or it's possible solution, I
> would really appreciate a repsonse.
> John Robarge
> 140JP