RCU Forums - ys 91 fa

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- - ys 91 fa (https://www.rcuniverse.com/forum/ys-engines-support-197/4921512-ys-91-fa.html)

venom290

10-27-2006 12:43 PM

ys 91 fa

Hello, my problem is my ys 91fa was running well then it started surging. It will idle all day, but over half throttle rpms will drop 50% in about 5 seconds, for 5 seconds,then return to high rpm. Using ys fuel, f plug. Any ideas?
Thanks, venom

Dave Shadel

10-27-2006 12:50 PM

RE: ys 91 fa

Could be something leaking. Check all the bolts.

venom290

11-09-2006 12:07 PM

RE: ys 91 fa

Just a quick note. I had a leaking fuel filler on the pressure side. All is well.
venom

Dave Shadel

11-09-2006 01:52 PM

RE: ys 91 fa

Good

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