B&S 13hp engine on a chipper

[MichaelSwan]

Hi, I have an old Troybilt chipper shredder that the previous owner installed a 13hp Briggs on. Came with a 10hp Tec that blew. Anyway, it is hard to start because of the way he ran the belts and I want to put a centrifugal clutch on it to make it easier to crank. So, I bought the clutch and it is supposed to be attached to the crank by a bolt going through the middle of it. For the life of me, I cannot find a bolt that will screw in there. The numbers on the engine are Model 245432, Type 0235E1 and Code is 00011949. Local dealer said I could go to the Briggs site and it should have that information. Well, I wasted 2 hours yesterday searching everywhere there and could not find any info on it. No idea if it is SAE or metric. It does look like right hand thread from what I can see. But certainly could be wrong. Any suggestions? Bolt needs to be about an inch and a quarter long to hold in the clutch properly. Thanks for any help
Michael

 

[slomo]

If you can't find the specific bolt, make one. If you have a grinder....... Bolts are cheap.

 

[ILENGINE]

Appears it should be a 7/16-20 tapped 1 inch deep

 

[MichaelSwan]

Appears it should be a 7/16-20 tapped 1 inch deep

Thank you, that is the ticket. I had to get a tap and once I was able to clean it out, should work just fine. Michael

 

[Auto Doc's]

Sorry a centrifugal clutch was never designed for this application, then engine does not run at high enough RPM quickly like a chainsaw.

Give it a try and you will find out fairly quickly with any considerable working torque trying to chip. If the chipper unit has a heavy flywheel (besides the engine flywheel) for inertia that would be ideal to make it work. Otherwise, it will burn up the centrifugal clutch pretty quickly.

On a hard shock load, at high RPM, like a big branch, it may shear the engine flywheel key.