Clean up that carb

[SwampmanLA]

Sorry for not getting back sooner but I still have to work and have been away. I started by pulling the top off of the carb, checking needle value, float, jet, and emulsion tube. Blew through all with air and carb cleaner. It was going so good I removed the two large bolts holding the carb base and cleaned it real good too. Really no need to do this because doing so did not allow access to other little holes to blow through. Put it all back together and had no extra parts. I think that is a first!

 

[BobRip]

I have been running the PT422 for about a week with the clean carburator. It starts every time cold the first time and almost as good hot. Big improvement.

 

[SwampmanLA]

Glad to hear it. I have been happy with my clean carb as well. I rarely go more than a week between starts but I wonder if Stay-bil gas treatment is needed to keep it clean. Cause it looks like a squeaky clean carb is needed for the Robin to perform.

 

[BobRip]

Glad to hear it. I have been happy with my clean carb as well. I rarely go more than a week between starts but I wonder if Stay-bil gas treatment is needed to keep it clean. Cause it looks like a squeaky clean carb is needed for the Robin to perform.

I put Stay-bil in all of my gas cans when I fill them at the gas station. I keep a lot around for the generator, so it may sit for months.

 

[BobRip]

I should have kept quiet. I am having the same problem of flooding if I start the engine cold with the choke on. I need to crank first without choke and then choke and start.
I talked to Continental Engines and the guy said that when the tank is above the carburetor this tends to happen. I find this a little hard to believe since for nine years the engine was OK. Anyway, he recommend that I put a loop in the fuel line so that the high portion of the loop is at the top of the gas tank. He has seen this help on other engines. I figured it was easy to do and did it. So far its running fine, but I have very limited experience. Has anybody seen this trick/technique before?

 

[ponytug]

Dear Bob,

I've seen the trick, and it works, but like you, I am skeptical that it suddenly needs it. I wonder if the float seat is slightly worn.

All the best,

Peter

I should have kept quiet. I am having the same problem of flooding if I start the engine cold with the choke on. I need to crank first without choke and then choke and start.
I talked to Continental Engines and the guy said that when the tank is above the carburetor this tends to happen. I find this a little hard to believe since for nine years the engine was OK. Anyway, he recommend that I put a loop in the fuel line so that the high portion of the loop is at the top of the gas tank. He has seen this help on other engines. I figured it was easy to do and did it. So far its running fine, but I have very limited experience. Has anybody seen this trick/technique before?

 

[BobRip]

Dear Bob,

I've seen the trick, and it works, but like you, I am skeptical that it suddenly needs it. I wonder if the float seat is slightly worn.

All the best,

Peter

The seat is not replaceable. I did order a new needle for the float. The PT is running great, but the fuel level in the filter gets low a times.

 

[stray]

My PT 422 2003 model Robin engine started loping. Pretty bad this time. Any way to make a long story short I found that a plug or cap must had fallen or come out. I had cleaned and took apart and blew out but nothing helped. And then I noticed a port that look cleaner than it should be especially when it was below and outside the air filter. With the engine running and it loping as it was I reached in and put my finger over that exposed port. Low and behold the engine smoothed out and ran like new. Here are some pics to help explain.

 

[Gravy]

Do I see JB weld?

I love that stuff!

 

[BobRip]

Why replace the tamper cap? Now you cannot adjust it. I did not know of this cap when I cleaned mine. I guess I missed something.