Engine Help > Kohler Engines

Kohler 25hp hard starting and back firing

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palskidoo:
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.
 

fordman21:
Did you end up getting the engine to start?

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