iahunter11

I have a 72 JD 110 with kohler 10hp motor.. It runs fine for about 30 min and then it dies and you cannot keep it running after that... You have to let it sit for a couple hours before it will run again... Anyone have any ideas what the problem could be.. Thanks..

tractor beam

Welcome to the forum Hunter! Have you checked the fuel tank ventilation? Is the tank clean? Could be debri in the tank floating into the pick up on account of the suction then when it dies, just floats away again, or something plugging the vent in your fuel cap and creating a vacuum.

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iahunter11

I unscrewd the fuel cap to see if that would help but it didn't.. Debri in tank is possible by why does it take so long to run again? you can start it with choke on right after but will only run for about 20 seconds and dies.. You can do that process all night if you want.. I just find it strange that it will run for so long before this happens then let it sit a couple hours and starts right back up .. I just don't know not get enough fuel one way or the other I think... Thanks for the welcome..

bstrang4

Sounds like the ignition coil is bad. Sometimes they will work fine when cold but will not work at operating engine temp.

iahunter11

Ok that kinda makes sense.. but it will still continue to start just won't say running.. is there anyway to test it?

ErnieS

To check if a component fails when it gets hot, you need to cool it down. The best way is to pick up a can of the canned air stuff they sell for blowing off computer keyboards. Next time the engine dies, hold the can upside down and aim it at the coil and spray for, maybe 10 seconds. Let it sit for the temperature to stabilize for a couple of minutes, and fire it up. Is that engine magneto or Hall effect ignition? Either could fail from heat
My '86 Harley would die from time to time and I'd have to sit along side of the road waiting for the ignition computer to cool off. A can of air in the saddle bag saved a lot of time until I converted the bike over to an aftermarket ignition system

bstrang4

Check the spark color when the engine is cold and when the engine is hot. Both times the spark should be a blue-white. If no spark or a weak yellow when hot then the coil should be tested with an ohm meter while hot. In some cases the choke will enrichen the mixture enough for the engine to try to start with very little spark.

iahunter11

OK I will try these things today and see what I come up with... Thank you very much for the help.. I will keep you updated on my progress..

iahunter11

Not really sure what I did. But I emptied gas tank... Put new gas line one... I decided to try to bypass fuel pump to see what happens.. I put in new spark plug.. Ran for about 2 hours without a problem... I shut it off and restarted 10 min later with the choke off... So it could have been fuel pump, spark plug, or fuel line... Not really sure but seems to be running ok now...

jhngardner367

Welcome to the forum! It sounds as if the fuel line may have been swelling and shutting off,or restricting fuel flow. Another possibility,is the plug could have a weak spot,or crack, causing a loss of spark,when it warms up. Glad to see you got it going.

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