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  #11  
Old 08-28-2021, 07:55 PM
glennjr glennjr is offline
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Join Date: Apr 2019
Location: New York
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Well Folks, I checked the compression today and it was 90 lbs. cold. I may do a hot compression test tomorrow. I also noticed when it it was cranking there was a lot suction at the exhaust pipe when the intake stroke was happening. Couldn't tell if any blow by on the compression stroke. I have a "whistler" that I am going to try to determine if any is present on the compression stroke. Also with that kind of compression it's hard to believe there is an exhaust valve issue, but I realize the engine was cold and the problem doesn't start until the engine is hot. I'll keep you posted as I progress. Thanks to all that have made suggestions.
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Old 08-28-2021, 08:26 PM
finsruskw finsruskw is offline
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Add a dose of Marvel Mystery Oil to the gas and some to the crank case.
That just may help.
Or remove the valves, inspect and reface and clean the stems as needed.
You can check for proper ACR adjustment then as well.
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  #13  
Old 08-28-2021, 09:26 PM
glennjr glennjr is offline
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Checked compression today and it was 90 lbs. cold. Will do a hot test tomorrow. 90 lbs. seems to be adequate, but the hot test should indicate a stuck valve problem because it only acts up when it's hot.
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  #14  
Old 09-10-2021, 10:36 AM
glennjr glennjr is offline
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Update on K 241 Kohler in 108. Have the engine apart and found a lot of carbon build up on the intake valve. Also a "blue" spot on the stem of intake valve. I presume that would indicated the valve was sticking and maybe why the carburetor felt very warm to the touch (vapor lock)? Going to replace valves (lap them in), springs also. Are the valve guides supposed to be protruding a small amount into the valve chamber? They don't appear to be worn.
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

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