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16 hp Tecumseh valve timing


brntkndll's Avatar
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10-11-04, 04:43 PM   #1  
16 hp Tecumseh valve timing

HELP !! I've got a 16hp Tecumseh from an old Sears ST/16 garden tractor.This engine was given to me in pieces and I am trying to reassemble it for a friend I have no idea how the valve timing should be set up. There is a mark on the case that I assume corresponds with the mark on the cam gear but nothing on the crank.I couldn't find any numbers on the engine but the Sears model # is 143.650012 it's an overhead valve engine and also has two balance shafts. Any help would be greatly appreciated. Thanks.

 
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cheese's Avatar
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10-12-04, 12:25 AM   #2  
Hello brntkndll!

Line up the mark with the keyway on the gear that drives the camshaft if I remember right.


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10-12-04, 12:11 PM   #3  
Thanks for the reply Cheese. I'm unable to see the key for the cam drive gear because of the pressed on roller bearing in front of it.

 
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10-13-04, 12:17 AM   #4  
Look for a beveled tooth on the gear on the crankshaft.


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10-13-04, 12:18 PM   #5  
Cheese, You are the man !!!!!!! Thanks so much for your help.Watching the cam followers while turning the engine over looks much better now. There appears to be a mark in the case by the cam shaft gear but it must just be a casting flaw. What do ya think? Again thank you so very much.

 
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10-16-04, 02:21 AM   #6  
Glad you got it! There are almost always casting marks of wierd sizes and shapes inside a small engine block. Probably nothing to worry about.


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