Export thread

This engine is on a craftsman riding mower and will only run for 20 minutes from cold, and then 15 minutes after a 20 minute cooldown. Heat seems to be the issue. Have checked oil, airfilter, cap, plug and changed away from ethanol gas. It literally just dies…no rough running at any time. Someone on another forum suggested it could be the ignition going to open circuit when getting hot. Any suggestions?

Ignition would be my first guess, but will need to confirm loss of spark after engine dies with a open gap spark tester, not a blink style tester. Need possible could be a failing fuel solenoid on bottom of carb, but that is not as common but does happen.

ILENGINE said:

Ignition would be my first guess, but will need to confirm loss of spark after engine dies with an open gap spark tester, not a blink style tester. Need possible could be a failing fuel solenoid on bottom of carb, but that is not as common but does happen.

Click to expand...

My seat has a sensor on it so the engine dies if I stand up…and that’s exactly how this engine is acting…like I got out of the seat at the 20 minute mark.

PamG said:

My seat has a sensor on it so the engine dies if I stand up…and that’s exactly how this engine is acting…like I got out of the seat at the 20 minute mark.

Click to expand...

ILENGINE said:

Ignition would be my first guess, but will need to confirm loss of spark after engine dies with a open gap spark tester, not a blink style tester. Need possible could be a failing fuel solenoid on bottom of carb, but that is not as common but does happen.

Click to expand...

If the spark tester shows loss of spark at the 20 minute mark…what does that mean?

PamG said:

If the spark tester shows loss of spark at the 20 minute mark…what does that mean?

Click to expand...

That basically confirms that the ignition module is heat failing. And would require the replacement of the ignition module

Ok thanks.

or ignition switch. get the VOM out and look for where the voltage disappears