Partial power loss

[mikeacro]

Thanks for all the input. For sure though, it’s not the carburetor, because the problem only occurs on the right tank. I did find witness marks on the valve that indicated the right side was not full opening. I will check the finger strainer as recommended.
Thanks!
Mike

[mikeacro]

Also, is there a recommended way to remove the fuel selector valve. Special tools?

[mikeacro]

I do not have the vent interconnect

[6643]

Also, is there a recommended way to remove the fuel selector valve. Special tools?

Double jointed wrists and lots of different wrenches.

[8362]

The restriction may not be large enough to show a difference but have you seen if you can see a difference in flow coming out the gascolator. Just time how long it takes to fill a quart or half gallon container. You could also separate the line to the gascolator to isolate it.

[mikeacro]

Yes, it took 2min and 4 seconds to drain a gallon from the gascolator when on the right tank ( the side I hade the problem ) and it took 1 minute and 21 seconds to drain a gallon with the left tank selected.

[mikeacro]

Also found a 20-30% blockage in the finger strainer on the right tank. Looked like carpet fuzz!

[8362]

Was the drain time pre or post “fuzz” removal? 81 vs 124 seconds is 53%, that’s a lot.

[8413]

1 gallon in 2min 4 sec should still be enough flow to not cause the engine to stumble. Even at full throttle the engine isn't burning anything close to that.
Josh

[6643]

Well, there is less head pressure at the carb in full throttle climb than at the gascolator on the ground.

As a point of reference, an O200 will burn 11.1 gallons per hour at full throttle and rated RPM. A C85 is about 7.7 gallons per hour.