MF 50 Stalling Problem

Any ideas?

One problem that is quite pervasive and covers all the brands of tractors using a Marvel-Schebler carburetor.

There is a screen in the inlet fitting that looks like an elbow. The gas line connects to it and goes into the carburetor. Take out that fitting and you will find an integral screen. Often this screen will get clogged and is easily overlooked. If you remove the gas line and check it for flow it will be alright. What will drive you nuts is that it will run great then die. Let it set for a little bit and it will start and go like nothing happened until you deplete the fuel in the bowl.

Blow out the carburetor and fuel lines with compressed air. I've saved many a carb rebuilds this way on cars and tractors.

One other thing to check out the next time it happens. Take the coil wire off and check for good spark. Sometimes, however seldom, the coil will get hot and the windings will open. When it cools off it starts up and runs until it gets hot again.

Check it out.

Ken McWilliams
Dayton, OH