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Broke A Bolt. How Deep Is The Hole?


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#1 New.Canadian.DB.Owner OFFLINE  

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Posted June 30, 2013 - 11:23 AM

I have a 16.5 hp Briggs Twin (401707 0111 04) on a B165 Wheel Horse.  I snapped the bolt that holds the points cover on (#12-24 x ???).  I think someone used Red Loctite on it.  Now I need to drill & tap it, but how deep can I go? Also, is the hole square with the front of the engine or does it go in on an upward or downward angle?

 

Alternatively, how long is the bolt (minus the head) (Briggs 93854)?

 

 

IMG_0223.JPG IMG_0220.JPG

 

 

Points diagram from manual.png Part numbers from manual.png

 


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#2 Texas Deere and Horse OFFLINE  

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Posted June 30, 2013 - 11:38 AM

Can you weld a nut onto it? I have had great luck in doing this and the heat from the weld helps loosen up the broken bolt.


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#3 New.Canadian.DB.Owner OFFLINE  

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Posted June 30, 2013 - 06:41 PM

That's how the bolt got this short.  I've welded 3 nuts on to it and they have all snapped the bolt (even with the gentle back & forth trick) without loosening it at all.  The bolt was super brittle.  



#4 olcowhand OFFLINE  

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Posted June 30, 2013 - 07:25 PM

I would drill no deeper than the slot between this screw boss & the push pin tower.  Place a piece of copper tubing or similar over the bit that will only allow that much bit to stick out so you can't over drill.


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#5 New.Canadian.DB.Owner OFFLINE  

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Posted July 01, 2013 - 08:42 PM



I would drill no deeper than the slot between this screw boss & the push pin tower.  Place a piece of copper tubing or similar over the bit that will only allow that much bit to stick out so you can't over drill.

 

Thanks for the advice.  Worked perfectly, once I got the carb & intake manifold off.  I re-sized the hole to #10 and used a #10-24 x 1" bolt.  I went to #10 because 1) I couldn't find any #12-24 bolts, 2) I had #10-24 bolts, and 3) it allowed me some room if I got the hole off centered a little.  

 

done.jpg

 

On the up-side, the Briggs Twin lives again.  Very satisfying, hearing it come to life and run under its own power.  Runs well enough I don't think it will even need a carb cleaning, despite what the PO said in his ad.  Does smoke something fierce, but that's tomorrows problem ...






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