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Posted by Gus on Sunday, August 22, 2010:

Here's the problem I'm having....

It's a five year old Craftsman lawn tractor, model #917.272673, with a Briggs & Stratton single cylinder 17.5hp engine, model #31C707.

It began with the engine becoming harder and harder to start - more sluggish over time.

It finally got to the point that the engine would start to crank and then stop turning over. It would get about one turn and then stop although it was still getting power to the starter and trying to crank. But it would not turn any more. A couple taps of the key would get it to turn a little and then another tap would crank to the compression position and then stop again.

I replaced the solenoid switch - same problem.

I had the starter tested and they said it was okay.

I replaced the battery and it started.

It started the next several times although it seemed to become more difficult each time.

I went to cut the grass today and I have exactly the same problem.

I'm at a point where I do not know what to do next.

It seems unlikely to me that the battery would be bad after a couple months. Solenoid is definitely good.

Could it be that the charging system isn't working correctly. How can I test that it is charging properly? If it's the alternator how do I replace it? The owners manual is not clear on where this is actually located.

Or could it be that there's a short somewhere draining the battery when not in use? How can I check for that?

Or maybe the starter is not strong enough for some reason.

Can I jump start the lawn tractor by running jumper cable from the car battery to the tractor battery? Or can I run power directly from the car battery to the starter to see if that would work? If I can, how would I do that safely?

I'm really at a loss on what to do. Any help would be very welcomed. The grass is getting tall!!!

Thanks in advance for any help.





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