Kubota T-1760 dies after getting warm

8198 Views 2 Replies 2 Participants Last post by mageerc, Aug 3, 2009

mageerc

Discussion Starter · Aug 2, 2009

I have a T-1760 with a Kawasaki 2 cylinder 17 hp gas motor that runs great until it gets hot (30-45 minutes) and then it dies just like the key was turned off on it. Attempts to restart result in the engine starting, running for a few seconds and then it dies... you can repeat this 2 or 3 times, then it does not start at all. After cooling for a hour or so it will again run normally for another 30 to 45 minutes and start the same failure sequence. I have the feeling that the problem is related to the electronic ignition, but have no idea how to troubleshoot which component. Can someone out there clue me in as to where to start? :i_praying

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Volfandt

· #2 · Aug 3, 2009

1st swag sounds like a fuel delivery problem.
1)Vapor lock?
Does the engine seem to be running hotter than normal?
Does the fuel line run close to the exhaust (manifold or muffler).

2) Fuel filter?
When was the last time the fuel filter was changed?

3) Gas cap vent clogged?
When it happens again, loosen or remove the gas cap to see if corrects it.
(I've had this happen on two different air cooled engines)

4) Air cleaner?
Is it fairly clean?

5) Plugs.
Plugs getting too hot can break down under load.

When it fails, immediately pull one or both plug wires and test to make sure you're getting spark. IF so you can possibly eliminate the ignition system (except the plugs) and go from there.
Good luck

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mageerc

Discussion Starter · #3 · Aug 3, 2009

Volfandt said:
1st swag sounds like a fuel delivery problem.
1)Vapor lock?
Does the engine seem to be running hotter than normal?
Does the fuel line run close to the exhaust (manifold or muffler).

The engine is water cooled and appears not to be running hotter than normal. I thought at first it was a fuel delivery problem myself as I've had a fuel pump go out on the motor before and it had somewhat similar symptoms, but I pulled the fuel line from the carb, turned the motor over and got a lovely stream of fuel from the line.

2) Fuel filter?
When was the last time the fuel filter was changed?

I change the filter every spring.

3) Gas cap vent clogged?
When it happens again, loosen or remove the gas cap to see if corrects it.
(I've had this happen on two different air cooled engines)

I didn't try this, but I suspect that is not the problem. However, I will give it a go the next time it happens.

4) Air cleaner?
Is it fairly clean?

Air cleaner was changed this spring as well...

5) Plugs.
Plugs getting too hot can break down under load.

When it fails, immediately pull one or both plug wires and test to make sure you're getting spark. IF so you can possibly eliminate the ignition system (except the plugs) and go from there.
Good luck

The plugs were changed last year... I pulled them and both looked brownish like they were not running lean and both were gapped properly. I'll have to pull a plug after an incident to see if it continues to give a good spark as I haven't tried that.

I appreciate your input and will try your suggestion to try to eliminate the ignition system, but it sure appears to be heading that direction. When the motor dies, it doesn't sound like it's starving for fuel, it's just a sudden stop like you turned the key off. The engine started these symptoms last year at the end of the mowing season and I had a separate problem with the carburetor that I attributed the whole thing to. The carb started running fuel out the top overflow hose and upon teardown and inspection, I found the float had a crack in it. I took that opportunity to rebuild the carb and clean it. I replaced the float, the needle valve and seat and replaced all the gaskets. The problem reappeared this year after the mowing season started...

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