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  #1  
Old 12-22-2017, 02:17 PM
Walker1940 Walker1940 is offline
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Default Engine backfires on shutdown
I have a Cub Cadet zrt 42inch deck mower. bought in 2010. Runs fine except when it is shut down the engine backfires one time. Engine is a Kohler SV470-SV620. Tried shutting down at different engine speeds, no change. Carbon Buildup in engine?
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  #2  
Old 12-22-2017, 03:07 PM
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Shut down solenoid my be bad. One thing that you may try is to pull the choke as you turn the key off.
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  #3  
Old 12-22-2017, 05:15 PM
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Once you park, try letting it idle for a whole minute before shutting it off. Letting my 1864 cool off helped it.
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  #4  
Old 12-23-2017, 08:55 PM
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Slow engine down and shut off at half throttle is the correct procedure according to the Kohler book
Oz
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  #5  
Old 02-04-2018, 05:32 PM
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I'm with Shrewcub on this! Bring down to idle and cool off a minute before shutdown.
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  #6  
Old 02-15-2018, 09:35 PM
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Quote:
Originally Posted by Billy-O View Post
I'm with Shrewcub on this! Bring down to idle and cool off a minute before shutdown.
I am with the manual Billy O , me thinks they might have a rough idea how to turn off the engine
Oz
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  #7  
Old 02-15-2018, 09:40 PM
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Simple,
try both, go with what works
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  #8  
Old 02-15-2018, 09:51 PM
J-Mech J-Mech is offline
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Simple,
try both, go with what works
What if neither work?
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  #9  
Old 02-15-2018, 10:02 PM
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If niether works, you've got a great way to scare the neighbor when he least expects it!
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  #10  
Old 02-27-2018, 10:02 PM
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Shut off fuel supply and let the carb burn out any remaining fuel. My 2008 zero turn did the same, but I had a flame thrower on startup. I could feel the heat on my left arm and the flame was at least 4 feet out with the plastic fuel tan right above it.....Oh, what a ride! It had a hole in the carb bowl and the entire carb needed a rebuild. So, how does the carb hole get a hole in it, damned if I know, but I suspect sloppy work and a wild screwdriver from the shop when I took it in last. My questions to the owner were like a train with no wheels, ......soon get nowhere!

Sounds like you need a carb rebuild...

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