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 Why is my engine back firing? 
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Joined: Mon Aug 02, 2010 11:06 am
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Post Why is my engine back firing?
I have a 25 Kohler LT. Has 22 hours on it, and it tends to back fire when I am slowing down, or idling after a long run....

What would be causing this??


Tue Oct 19, 2010 7:18 am
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Post Re: Why is my engine back firing?
Water in the fuel?

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Tue Oct 19, 2010 7:56 am
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Post Re: Why is my engine back firing?
Make sure your valves are set correctly.


Tue Oct 19, 2010 1:56 pm
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Post Re: Why is my engine back firing?
The valves on the kohler should not need adjustments. If you start screwing with them, be carefull. You do not set them like a motor with solid lifters...


Tue Oct 19, 2010 2:00 pm
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Post Re: Why is my engine back firing?
Do you have any additives in the gas? I hear that if you have octane booster or water remover in the fuel it can cause that. also, when was the last tune up? can you tell if its blowing out of the carb or the exhaust?


Gee


Wed Oct 20, 2010 12:22 am
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Post Re: Why is my engine back firing?
There was some fuel stabilizer in the gas tank.....

It is blowing a small flame out of the exhaust


Wed Oct 20, 2010 8:04 am
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Post Re: Why is my engine back firing?
dump it out and clean it put fresh gas

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Wed Oct 20, 2010 1:41 pm
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Post Re: Why is my engine back firing?


Thu Oct 21, 2010 1:02 am
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Post Re: Why is my engine back firing?
Hmmmmmm, blowing flame out the exhaust, excessive backfiring............ Sounds to me like a very rich mixture. Is the air filter dirty, wet or oiled up? Is the float in the carb set too high? Is the choke open all the way? Are you hitting on both cylinders?
Kohlers are good at backfiring, but I've never seen one that was running right blow flame.
Good luck and let us know what you find.

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Thu Oct 21, 2010 6:58 pm
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