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1. 08:54 AM - Re: Low RPM on Takeoff??? (kerrimikehickman)
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| Subject: | Re: Low RPM on Takeoff??? |
I had that exact problem w/912ULS...=0A=0A=0A-Findings: very small
hairline crack/approx. 2mm long in very small indentation (or
igin unknown) in top of one carb housing...=0A(discovered after
sending carbs to LEAF for routine ultrasonic cleaning/rubber rep
lacement).=0A=0A=0A--Result: replacement of carb top housing led t
o normal engine operation at all power settings.=0ACheers=0AMike=0A
=0A=0A-----Original Message-----=0AFrom: tmitton <tmitton99@gmail.com>=0AT
o: rotaxengines-list <rotaxengines-list@matronics.com>=0ASent: Mon, Aug
4, 2014 6:12 pm=0ASubject: RotaxEngines-List: Low RPM on Takeoff
ton99@gmail.com>=0A=0ARecently my 912ULS engine started only going
to 5000rpm on takeoff with full =0Athrottle.=0A=0APreviously it
always went directly to 5500rpm or so upon application of fu
ll =0Apower. Now it only goes above 5000rpm once it has be
en flying for a few minutes. =0AOnce flying it will still
go to 5500+ even in a climb so it isn't like it is =0A
just the climbing load on take off that is holding it back
. =0A=0ANo changes have been made to the engine so I don't
know what would cause the RPM =0Adrop. It is enough that
takes offs now need 1000+ feet where as before 500-600ft =0A
was enough. There is definitely a noticeable difference. =0A=0AI
have checked the carburetor linkages - full throw to the
stops there. Drained =0Athe gas in case it was old and rep
laced it with fresh new gas - no change. Tried =0Ait with
half a tank of 100LL to give it an octane boost - no c
hange. Checked the =0Aspark plugs - still clean after only 2
5hrs of use. Nothing stuck on the rads. =0AOil topped up.=0A
=0ASo - any idea as to what might cause the drop in rpm?
=0A=0A=0A=0A=0ARead this topic online here:=0A=0Ahttp://forums.matronics
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