Kuler64

Kuler64

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exmark 27hp kohler pings under load and starts missing after a time then picks back up 20 minutes or so later
 

ILENGINE

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Get us the model and spec number off of the engine tag so we can see what configuration of engine you have.
 

RDA.Lawns

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exmark 27hp kohler pings under load and starts missing after a time then picks back up 20 minutes or so later

First thought is bad gas. Sounds like what is referred to as labor knock . could be a few different causes . First replace the gas with good fresh gas. Check for results .No improvement your carb could be to lean .
 
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