JD 170 wont fire / start


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JD 170 wont fire / start

Ron My 170 has been acting up , starting hard, a few eeks ago it ran a bit, then wouldnt start. I removed the plug cleaned it, it then started. Still started hard after that. It started this morning, ran enough to back it out of the garage, flipped the mower switch and it died. From that point on, it will not start. I have replaced the plug gapped it to .030 and by cranking the engine, I will most times see spark when grounded against the frame. I have tried spraying starting fluid into the air intake but I get nothing .. a backfire once in a while...I would think if I have spark at the plug, and shotting starting fluid in .. it should at least burn that ... (could the ignition coil / flywheel gap change and cause this ?)
any help would be appreciated.

ross I would check the flywheel key to see if it is sheared or broken just enough to throw the engine out of time. Also take the spark plug out of the head and turn the engine over and put your thumb over the spark plug hole. The compression should push your thumb off of the hole. If it doesn't then you have other issues with the valves or cylinder rings and walls.


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