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#65226 24/06/15 04:48 AM
Joined: May 2008
Posts: 44
Novice
Hi All
Just rebuilding my 11hp Briggs and found the retaining bolt for the drive pulley missing. The Cox number for the bolt is SH0720F but what I'm after is the size and thread pitch? Anyone seen this or will it have to be a genuine Cox part?
BTW The bolt not listed as a B&S part on my drawings.
Thanks

stevea #65243 25/06/15 10:54 AM
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What are the engine numbers?

AVB #65268 26/06/15 08:29 PM
Joined: May 2008
Posts: 44
Novice
253707-0164-01

stevea #65285 27/06/15 09:45 PM
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The 498994 crankshaft was tap at 7/16"-20 tpi UNF-2B 1" deep per Briggs crankshaft drawings.

stevea #65286 27/06/15 09:50 PM
Joined: Jan 2015
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Here is the crankshaft drawing.
[Linked Image from i1329.photobucket.com]

stevea #65287 27/06/15 09:53 PM
Joined: Jan 2009
Posts: 6,926
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Pushrod Honda preferrer
***
So, the thread is 7/16" diameter by 20 threads per inch - in other words, you need a 7/16 UNF bolt. The end of the crankshaft is tapped 1" deep. To select a bolt length you need to know how thick the washer or whatever clamps onto the end of the crankshaft is.

grumpy #65326 28/06/15 09:48 PM
Joined: May 2008
Posts: 44
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Thanks for the info. I'll put the pulley on and do some measuring.


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