yanmar problem

[dstifel]

Running a yanmar 72" mower. Mower fires right up runs great for maybe a hour and then dies. Try to start it weak battery. Let it sit for awhile maybe 30 mins fires up runs for awhile dies. Brand new battery alternator checks out good temp gauge stays in middle. What is going on?

[richardcog]

Check the core sometimes they will work when it get hot they stop

[heather lawn sp]

possible dirty or corroded electrical connections. Old seat delay switches will fail and shut out mower when they warm up. fuel pump or filter. A faltering stop or shut-off? Shut off solenoid?

[dstifel]

What is the core sorry not familiar with these engines at all? Thanks

[Bashby]

Originally Posted by dstifel

What is the core sorry not familiar with these engines at all? Thanks

I think he meant coil. When it shuts off and cranks slow, try turning the engine by hand. First see how hard it is to turn when cold for a point of reference.

[Pietro]

If its a yanmar diesel it wont have an ignitor coil

[dstifel]

bump getting ready to tear into this and still have no idea what to be looking for

[dstifel]

Still have not fixed this guys help me out!!