Kohler Twin Backfire

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  #1  
Old 06-15-19, 04:01 PM
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Kohler Twin Backfire

I was looking for help last year on a 1989 Kohler 16hp twin that was backfiring when starting. Cheese said it probably was fuel leaking from the Carb back into the engine. I took the carb apart and found the float was way above level. I adjusted it so it was level and 3 things happened. It stopped backfiring on initial cold start, It ran a lot better, but if I shut the mower down and then had to restart it, it would backfire loud enough to wake the dead. Before I take the carb apart and set the float lower, is there anything else that your experience I should look into as a cause of this? If I wait for it to cool down completely, it starts just finewith no backfire. The engine was completely professionally rebuilt last year with new rings, valves, seats, guides, gaskets etc.
 
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Old 06-15-19, 08:09 PM
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Have you serviced the points and condenser lately?
 
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Old 06-16-19, 12:19 PM
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Chuck I thought I replied to your post this morning but I dont see it here. This Kohler has a Solid state ignition which was replaced right after I did all the other work last year. I did not see a twisted flywheel key, and don't know what else would affect the timing (Just when it is HOT) It really runs well otherwise.
 
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Old 06-16-19, 01:19 PM
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Slow cranking (low battery or dragging starter) can make it more likely to backfire. Also you might try a different spark plug, just a regular champion. Closely mounted muffin type mufflers can also increase chances of backfires.
 
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