Hi Couper,
I would verify engine timing.
First time one mechanic did an annual on my coupe he re-set the
timing...wrong.
Fuel burn increased by almost half!
Could just as easily have had adverse effect on available power.
Another few other things to check for:
1. Clogged air filter (this would tend to show itself as no change
or increased RPM when you check Carb Heat)
2. Throttle cable travel limited (incapable of full throttle)
3. Binding of butterfly in Air Filter assembly
4. Mixture control (holes) inside carb obstructed
5. Check for adequate gravity flow by disconnecting fuel line to carb
and timing how long for three gallons to drain.
6. Check for obstructed screen in gascolator
How is compression?
How is oil consumption?
Regards,
WRB
--
On Oct 9, 2009, at 18:08, <[email protected]> wrote:
>
> ---- Hartmut Beil <[email protected]> wrote:
>>
>> "Gross weight was approximately 1300 lbs airspeed indicates about
>> 95mph which checks out pretty close with GPS Climb is pathetic"
>>
>>
>>
>> Ok. The fact that you are low on climb indicates your engine has a
>> problem.
>>
>>
>>
>> 95 in cruise is also not what to expect on a C-85. Of course, you ASI
>> could be off.
>>
>>
>>
>> But 2350rpm max and 95 MPH plus marginal climb all together indicate
>> a low performer.
>>
>>
>>
>> Now, why is that?
>>
>>
>>
>> Was the airplane always performing that bad?
>>
>>
>>
>>
>>
>> Hartmut
>>
>> Yes it has always performed poorly the only difference was the old
>> tach showed redline rpm 2575
>>
>> To: [email protected]; [email protected]
>> From: [email protected]
>> Date: Fri, 9 Oct 2009 12:51:59 -0700
>> Subject: RE: [ercoupe-tech] Prop pitch
