RPM goes back and fwd 200 RPM while cruising

Re: RPM goes back and fwd 200 RPM while cruising

by Kevin Machniak » 11 years ago

Kevin Machniak

6 167 40

I dont have that problem ,but first thing to come to mind is an intermittent fuel restriction. Do you have a fuel pressure gauge?

Is it a constant in rythm pulse? Is it affected by slight pitch control up or down?

Any work done prior to problem?

I think you need to supply as much details as you can .

Re: RPM goes back and fwd 200 RPM while cruising

by gaetan belanger » 11 years ago

gaetan belanger

0 10 0

Buenos noches Julio, I agree with Kevin , give us a bit more details .....is it only at cruse or at idle also ? have you inspected your engine compartment after your last flight for leaks or vacuum leak

Phil

Re: RPM goes back and fwd 200 RPM while cruising

by Julio Consuegra » 11 years ago

Julio Consuegra

5 7 0

I did the 500 hors service and changed the cowling. It happens in cruise at 5.300 rpm

Re: RPM goes back and fwd 200 RPM while cruising

by Julio Consuegra » 11 years ago

Julio Consuegra

5 7 0

I do not have the fuel pressure gauge, it happens at 5.300 rpm in level flight. I did the 500 hours service and changed the cowling

Re: RPM goes back and fwd 200 RPM while cruising

by gaetan belanger » 11 years ago

gaetan belanger

0 10 0

Hola Julio take a magnefying glass and have a look at your intake manifold.....around the bolt and right in the middle...also check you intake gasket...may I ask why you did change your cowling ???
buena suerte