I have a Scag Freedom Z with a Kawasaki FH580V-AW00 that is 14 years old with less than 700 hours. I've changed the oil and filter regularly and run only non-ethanol 87 octane. Never had any problems until now. Recently it wouldn't start and seemed the cranking speed was slower than in the past. I never really paid much attention to the cranking speed because it always started quickly. Because the battery was old, I went ahead and replaced it. Same problem. On one attempt it did start with the use of some starting fluid. Experienced a couple of backfires in the process. I shut it down after a few minutes and it restarted fine. After returning from a trip and no activity with the mower for a couple of weeks, again it won't start. Slow turn over.
I removed both plugs to see if there would be any change with no compression. Still slow. I had replaced the plugs 5 months ago. I can see some spark with the plugs in place and the plug wire held near the plug terminal. I know an ignition coil can be "bad" and still produce a spark, albeit inadequate, but it doesn't seem like both coils would fail at the same time. And of course defective coils wouldn't cause a sluggish crank. I've wondered if a hotter spark would result in a good start up at what I think is a sluggish crank.
Is it safe to assume that there is no issue with the starter because it does engage and turn the engine?
Any suggestions will be appreciated.
Mike
I removed both plugs to see if there would be any change with no compression. Still slow. I had replaced the plugs 5 months ago. I can see some spark with the plugs in place and the plug wire held near the plug terminal. I know an ignition coil can be "bad" and still produce a spark, albeit inadequate, but it doesn't seem like both coils would fail at the same time. And of course defective coils wouldn't cause a sluggish crank. I've wondered if a hotter spark would result in a good start up at what I think is a sluggish crank.
Is it safe to assume that there is no issue with the starter because it does engage and turn the engine?
Any suggestions will be appreciated.
Mike