Posted by T.R.K. on October 09, 2021 at 18:58:26 from (71.31.64.233):
In Reply to: Kawasaki 23 HP engine posted by lenray on October 09, 2021 at 13:34:59:
Why not invest in two of those in-line spark testers from Harbor Freight and put them between your spark plug wires and the spark plugs. Then the next time your mower pulls this half-power stunt, look and see if both the light bulbs are still lit. If they are, that should eliminate the spark question.
If one is 'off' that coil on that side is not firing that cylinder. (But with certain Kawasaki engines the real problem may be in the opposite coil. The diode in the coils on some of their engines is in the coil instead of in the 'kill' or stop wire between the coils. Like it is on Briggs and Kohler. So a bad diode in one coil can stop the spark in the opposite coil.)
It apparently doesn't matter if those testers are left on there. I left a couple on one mower and only got them back several months later when that mower returned to the shop for some other repair.
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