The International Cessna 170 Association

To get the rpm rise at idle cutoff, you need to adjust the idle mixture.Too much of rpm rise is too rich of a mixture and not enough rpm rise or no rise is too lean. Stan Yes, I know, but on my airplane screwing it out to 3 turns still doesn't give a rise, but certainly hurts transition. I suspect ...

Ly-con claims to have a flow bench and can test the carb in all of it's various running states to confirm operation.

I know the gascolator was gone through, but not sure about the carb. I double checked it on my own.

Thanks for the input.

schu

Carb was not worked on, I don't have the logbooks here, still need to grab those from the hangar. I did remove the screen and cleaned it, but not the bowl. I ended up getting sick which hosed me from working on it very much, but after thinking about it, I don't recall ever getting a good rise out of...

I found one intake elbow was leaking so I fixed that and it runs okay now. It's as good as it was before annual. I still can't get a 25-50 rpm rise on shutdown, but now that I'm thinking about it, my airplane never really did that that well. What could be wrong with the carb that causes that? Plugge...

Yea, my mechanic has a full on sparking plug tester.

Thanks for the reply First thing is to try to discern if it’s fuel or ignition. Agreed, but hard to figure out. Both can cause missing and roughness near idle. The cylinder work will have stressed the ignition leads to those spark plugs. Use a tester to make sure the leads are good (no leaks or shor...

Airplane: 1949 c-170A o-300-d swapped in years ago Not sure model of carb, I'm going to head up to the hangar and look at it later today. Symptoms: Engine missing a little bit below 1200ish rpm, runs very strong above 1600 rpm. Engine idle is pretty poor below 800rpm, before annual it ran fine at 70...

So I have a 170A (sn 18877) and I swapped in the much nicer master cyls from a B model thinking I could use the Newsletter dated 6-5-1952, however the letter states it applies to Serial number 20041 and up, and mine is below that. So what's the deal with using the Cessna master cyls instead of the o...