Check out some similar questions!

topthumb · Mar 20, 2014, 04:53 PM

Found out that gas was getting into my crankcase and causing severe smoke and hard running. I removed the carb and replaced everything that came in the carb rebuild kit, and installed the carb back onto the engine. When I tried to start it, the battery had died so I put a charger on it and came back about an hour later and could see that the carb had filled up with gas again looking down into the carb where it connects to the air cleaner. I'm afraid now that gas has gone into the crankcase again after I drained the oil and put new oil and filter. The only thing that I can think of to cause this is two things.
1. The carb kit came with 2 different needle seats and I installed the one with the larger hole and should have used the one with a smaller hole.
2. The fuel solenoid is sticking open, maybe bad

Please help, my grass is growing fast!!

ma0641 · Mar 20, 2014, 05:00 PM

Either the solenoid could be bad or the wrong size needle and seat.

topthumb · Mar 20, 2014, 05:12 PM

Just tested the solenoid and it works fine. The rebuild kit only came with 1 needle valve but 2 different sized seats so it can't be the needle valve, just the seat maybe.

crigby · Apr 10, 2014, 08:00 AM

Hi,
The seats are for gravity-fed (large hole) and pump-fed (small hole) fuel systems. You use them accordingly. The seats also have a ring on the side that goes in first; the other side has the slight bevel for the needle. Usually your problem would be caused by the seat being upside down or inserted crooked. Service schools used to say to use a #5 crochet needle as a tool, hooked end for removal of the old seat and othe end to insert the new one. I have generally used the blunt end of a drill bit or an Allen wrench as an insertion tool. A needle kit will contain the needle and both seats in it.
Peace,
Clarke

topthumb · Apr 10, 2014, 11:40 AM

Originally Posted by crigby

Hi,
The seats are for gravity-fed (large hole) and pump-fed (small hole) fuel systems. You use them accordingly. The seats also have a ring on the side that goes in first; the other side has the slight bevel for the needle. Usually your problem would be caused by the seat being upside down or inserted crooked. Service schools used to say to use a #5 crochet needle as a tool, hooked end for removal of the old seat and othe end to insert the new one. I have generally used the blunt end of a drill bit or an Allen wrench as an insertion tool. A needle kit will contain the needle and both seats in it.
Peace,
Clarke

Thanks for the info but I got everything back together and the engine is running like new again. I never got an answer for which one to use so since I had installed the seat with the large hole and it flooded the engine and crankcase with gas, I just took it out and installed the seat with a small hole and all is good now.