Kohler 19hp spark but no start...Please help

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  #1  
Old 03-28-10, 12:20 PM
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Kohler 19hp spark but no start...Please help

Relatively newer lawnmower with little use. Since new, it's always cranked for quite a while before starting. After sitting this winter used starting spray and it started but wouldn't keep running. After several attempts with spray, it finally quit starting at all even with spray. I have spark. I did get a strange sound possibly a backfire once. It seems to have good compression. Grass growing and wife pressing. Any help very much appreciated.
 
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Old 03-28-10, 01:38 PM
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Please post the tractor model number and the engine model number.
 
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Old 03-28-10, 01:56 PM
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Craftsman Mod#917-274660
Stamped on engine - 20-499-01 CAV-1
Thanks!
 
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Old 03-28-10, 04:23 PM
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Kinda sounds like a sheared flywheel key to me. I'd check... I've been seeing that lately on kohlers.
 
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Old 03-28-10, 05:07 PM
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Cheese.....You nailed it!

Removed flywheel cover and the key is definitely sheared. Now....How to remove flywheel? Applied penetrating oil and pried enough to determine that it is on there good. Will look around online....anyone having advice....thanks. God Bless You!
 
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Old 03-28-10, 05:09 PM
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Sears # for the keyway X-42-15-S.
You may also need to clean the carb.
 
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Old 03-28-10, 05:12 PM
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Originally Posted by gwp28542 View Post
Removed flywheel cover and the key is definitely sheared. Now....How to remove flywheel? Applied penetrating oil and pried enough to determine that it is on there good. Will look around online....anyone having advice....thanks. God Bless You!
Using a block of wood, hit the carnkshaft with a hammer a couple of times. It should pop right off.
 
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Old 03-28-10, 05:30 PM
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Got it......

Didn't think through last post....DUH....Came right off with a puller. I'll hopefully get the part tomorrow at Sears. You guys are great. THANKS SO MUCH!!!
 
  #9  
Old 03-29-10, 06:26 PM
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Sheared another Flywheel Keyway?? What the......!!

Just installed another keyway, engine started momentarily, backfired and sheared again! What the heck is going on here? Any ideas appreciated.
 
  #10  
Old 03-29-10, 06:39 PM
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One other thing......

I might have not torqued the flywheel nut sufficiently. Also, (like a dummy) I put a little oil on the inside of the flywheel. I now realize I might have "encouraged" the flywheel to slip. Anyone know the proper ft.lbs. of torque for the flywheel nut? I predict that when the engine started and began to rev, the flywheel couldn't keep up and sheared? The nut was not very tight after this happened. Any ideas? thnaks again
 
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Old 03-30-10, 12:32 AM
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Yep, the flywheel bolt should be very tight and the mating surfaces should be clean and dry with no oil or grease. I don't have the torque specs on hand this moment, but I use an impact gun to tighten them.
 
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