Ring Gap Specification

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  #1  
Old 05-20-03, 04:42 PM
TrackerSD
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Ring Gap Specification

I am working on a Tecumseh 4.5 Horse on a Craftsman Lawnmower, and I need the ring gap. I had to go to a .010 over piston. I usually don't work on lawnmowers and I really don't want to buy a book for a one time use. Thanx.
 
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Old 05-21-03, 01:34 AM
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Do you have the model# of the engine?
 
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Old 05-21-03, 05:15 PM
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I'm sorry, I spaced it
The mower number is 917-376250
The engine number is 143-964504
As far as I can tell it is a TVS-115 from crossing the part numbers back and forth. The TVS number was close enough to get me the piston, valves and oil pump from a local dealer.
I have gotten used to fudging numbers over the years from working on my bike
Since the pistons are close to the same size, I was concidering going with the same ring gap. But I would like to get the right settings in case it doesn't like brit.
Thanx again for any help.
 
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Old 05-21-03, 10:44 PM
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My book here doesn't show that sears# for reference, so I'll check my other tecumseh books to see what I can find out. You are probably right with your guess, but it would be best to find out for sure. I'll try to get that info for you tomorrow.
 
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Old 06-03-03, 04:51 PM
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Had to cut the grass (the dogs in the back yard were disappearing)
so I took the gap from an A65L BSA twin. It had the same piston size. Thanks for your help tho.
 
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Old 06-04-03, 09:32 AM
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Oops...I spaced this time, lol. I forgot to get that info for you. Sorry. Glad you got it going!
 
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