Rpm

by Steve desbiens in General Tech Discussion 6 years ago

I got a 912s that didn t run since a year. I started it with new fuel 100 lll and i can not reach more than 4600 rpm,the sparks p’ugs are new and i didn t change anything else. Can t you help me

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Re: Rpm

by Peter Kl. » 6 years ago

Peter Kl.

7 215 349

Do the carbs fully open? Are the airfilters clean? Are the fuel filters clean? Is there anything that can limit fuel supply?
Do you have any more engine data available, like EGT temps?

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Re: Rpm

by Steve desbiens » 6 years ago

Steve desbiens

1 4 0

Yes carbs are full open and fuel line is ok.the egt eere about 1100, at 2000 rpm but i didn t check the air filter. I will tomorrow morning thank

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Re: Rpm

by Peter Kl. » 6 years ago

Peter Kl.

7 215 349

Please check all 4 EGTs at max rev.
In case you have a fuel flow sensor installed, check the reading at max rev/WOT, too.
What’s your airfield altitude in conjunction with MAP reading at full rev/WOT?

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Re: Rpm

by Steve desbiens » 6 years ago

Steve desbiens

1 4 0

Ok i will check it tomorrow morning thank for all

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Re: Rpm

by Roger Lee » 6 years ago

Roger Lee

126 5.14k 4.62k

Is this 4600 rpm static on the ground rpm or in level flight? If static it may be normal rpm. Is this a 912ULS or a 912S certified engine?

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

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Rpm

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