Author Topic: Kohler 25hp hard starting and back firing  (Read 6172 times)

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Offline palskidoo

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Kohler 25hp hard starting and back firing
« on: September 22, 2022, 09:13:52 am »
Hello all,
I have been having issues with my command 25hp starting. The first start is always the worst, it will crank and crank and crank, all the while backfiring in the intake with flame coming out the carb.

I am running a nikki black tube carb which was cleaned thoroughly
valve lash is .004 on the intake and .006 on the exhaust
fresh spark plugs
stock internals (aftermarket rods and pistons)
stock timing (per ARC flywheel) ---could the timing be off?

I was able to run a buddies "stock" BP and it would just fire right up and purr. I'd like to get mine to start as reliably.

Offline fordman21

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Re: Kohler 25hp hard starting and back firing
« Reply #1 on: November 10, 2022, 05:38:44 pm »
Did you end up getting the engine to start?
Ryan Kerr  519-332-9532
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