Craftsman LT 1000 with Kohler 16HP engine - Lawn Mower Forums : Lawnmower Reviews, Repair, Pricing and Discussion Forum
 
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post #1 of 7 (permalink) Old 09-23-2019, 04:36 PM Thread Starter
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Craftsman LT 1000 with Kohler 16HP engine

Hello,



Has anyone ever experienced an issue with periodic rough idling ( nearly wants to stall, but doesn't )?



After about 10 mins. of running, this engine acts as though it is running out of fuel...but, then will begin idling well, once again.



I've changed the spark plug & ignition coil, but to no avail. Am going to change the fuel filter in a day or two.



Could this be a carb issue or simply just a fuel filter problem? When acting up, putting more strain on the engine (engaging blades)...will only cause the problem to get more severe...wanting to spit, stutter, etc.



Any opinions out there? Thanks!
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post #2 of 7 (permalink) Old 09-23-2019, 05:13 PM
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It could certainly be a fuel starvation problem caused by a bad filter; if that doesn't resolve the issue, you might have to clean the carb out and check that the float is not sticking. Also, make sure that the gas cap vent is not restricted.

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post #3 of 7 (permalink) Old 09-23-2019, 06:09 PM Thread Starter
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Thanks...I loosened the gas cap and even removed the cap ( with engine running ) which yielded the same results.



I'll replace the fuel filter and see where that leads.
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post #4 of 7 (permalink) Old 09-25-2019, 09:35 PM Thread Starter
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Quote:
Originally Posted by Craftsman2959 View Post
Hello,



Has anyone ever experienced an issue with periodic rough idling ( nearly wants to stall, but doesn't )?



After about 10 mins. of running, this engine acts as though it is running out of fuel...but, then will begin idling well, once again.



I've changed the spark plug & ignition coil, but to no avail. Am going to change the fuel filter in a day or two.



Could this be a carb issue or simply just a fuel filter problem? When acting up, putting more strain on the engine (engaging blades)...will only cause the problem to get more severe...wanting to spit, stutter, etc.



Any opinions out there? Thanks!

Update...changed fuel filter, but did not remedy the issue. Stator is putting out 30 VAC as well.



I am next going to remove bowl from carb and inspect for any debris...I do add Seafoam to my gasoline, so hopefully it looks clean once I remove the bowl.
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post #5 of 7 (permalink) Old 09-26-2019, 06:51 AM
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It does sound like a needle/float sticking issue (however the usual fail on Kohler is leaking/poor sealing needle and seat) ,but check the solenoid also. Those commands have a removable tip on the fuel solenoid plunger. Sometimes I've seen those fall off in the bowl and cause the issue you are having. Other issue could just be the solenoid is not getting 12 volts all the time caused by chaffed wiring from age and vibration. Or the solenoid itself is starting to fail and intermittently closing.
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post #6 of 7 (permalink) Old 09-27-2019, 05:06 PM Thread Starter
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I removed the carburetor bowl and it had sediment within. Sprayed it out well with carb cleaner and it seems to have cured the problem. I never realized that sediment in the carb bowl could cause an engine to run poorly. I've always been one to change the fuel filter, regularly. But, I guess seeing sediment is believing.



When engaging the blades, the mower would struggle to keep running. After the carb cleaning, it now seems to run normally.



Thanks for the tip...looks as though this did the trick!
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post #7 of 7 (permalink) Old 09-29-2019, 12:08 AM
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Thanks for letting us know what you found out.

Mark - 2002 John Deere LT150H

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