19.5 hp Craftsman Tractor

Thanks

The other thing you might want to check is the governor. I have an older Tecumseh which surges all the time when not under load as the governor "searches". It has been doing this for three years but when engaged it evens out and runs well. I probably should work on it, but I have other things that won't run at all that demand more attention.

The problem with the Tecumseh might be related. It sounds like a vacuum leak. They are often caused by someone reinstalling a carb with a wrong/cracked/dirty/torn gasket, no gasket at all, or wrong bolt torque.

Thanks to all.

B12 Chemtool has saved my backside more times than I can count. This is why I share it with others.

Here's what I do. First, I NEVER drain gas from any piece of equipment in spite of them being stored 6 months each year. I just fill the tanks to the top each fall to keep the condensation down. This also keeps rust from forming in tank.

In the spring I siphon off a bit of gas and add B12 to the top of the tank. Anywhere from a couple of ounces to a whole can depending on the size of the tank. I let them sit for a couple of hours and then they fire right up. They might run a little rough for the first couple of minutes until all the water and crud in the carburetor's float bowl is replaced. Then they purr like a kitten.

Oh yeh, B12 in the spray can will knock down any nasty flying insect like wasps, etc. instantly. Just be sure not to breathe the stuff!