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Cub 1550 with kohler courage. Runs fine and then loses power, runs erratic and starts to backfire. Cleaned carb and fuel pump and ran fine for 30 minutes and then problem started again. When this occurs, enabling choke does not change engine performance. Changed fuel filter, plugs and air filter when problem started late last year. Ran fine for a period of time and then problem started again.

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  • Garden Master
  • 813 Answers

Replace fuel filter after cleaning tank thouroughly, to clean tank remove fuel line at carb. Drain all fuel then leave line loose until you flush tank with carb. Cleaner then blow out tank with compressed air. Now install new fuel filter and check your fuel can for trash and water better yet just add fresh fuel.

Posted on Aug 12, 2017

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Runs good for about an hour, then needs 15-30 minute rest period

When it's about to quit, quickly undo the gas cap. If it roars back to life, you have a vacuum problem, where the vents aren't letting air into the gas tank to replace the used fuel, so after a while, gravity isn't sufficient enough to pull gas from the tank until is sits and equalizes for a while.

Posted on Jun 30, 2009

  • 61 Answers

SOURCE: engine runs but sputters after engaging blades

ck for water in carb bowl. also ck for filter in gas tank, or something in gas tank.

Posted on Sep 06, 2009

  • 79 Answers

SOURCE: 02 yamaha vstar 1100, ran fine. started it the

Sounds like it may be drawing air around the intake somewhere. Let it idle and spray around carefully with wd-40 until it speeds up. This will reveal the leak.

Posted on Oct 11, 2009

  • 5603 Answers

SOURCE: kohler 19 hp runs then backfires and stalls when heated up

Check that the keyway for the flywheel to the crankshaft hasn't sheared. This is a common problem that throws timing very far off causing backfire and no-starts.

Posted on Nov 02, 2009

huffman49
  • 235 Answers

SOURCE: MY NEIGHBOR KOHLER COURAGE 20 LTX1045 WILL TURN

check and see if it's getting spark by removing the plug from the engine and keeping it plugged into the wire,lay the plug on the head and turn the engine over and look to see if the spark is jumping accross the gap. if it's blue your ok if it yellow you'll have to replace ignition modual..good luck

Posted on Apr 10, 2010

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