Lawnmower blade bolt


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Old 05-05-16, 05:24 PM
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Lawnmower blade bolt

Is there a special type bolt I need to get to replace my bolt on B&S model 92900 3 1/2 hoss, vertical shaft lawnmower engine?

The mower is a 1971 Snapper V21 if that matters.
 
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Old 05-05-16, 05:36 PM
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Probably not special. But you'll need to have the correct size, along with a washer and most likely a lock washer. Maybe a spacer also. Google for a parts list and get the right number. Or go to Jacks small engine repair and give model number and make of mower for exact fit.
 
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Old 05-05-16, 06:18 PM
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Well, not sure of my Snapper's model number, the decal on top of deck is encrusted with 45 yrs of dirt, looks hopeless to clean it enough to read. It's a bit of a Frankenstein mower as I replaced the original engine in 1986 when the original threw a rod. Looks similar to the V21P 83053 diagram I see on Jack's though. I have a square mounting block on the shaft though.
 
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Old 05-05-16, 07:05 PM
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Googled it like you suggested and found the Snapper parts list. It spells out the type of bolt. 3/8-24x1 5/8 Hex Head Cap Grade 5, I'll look for one at HD tomorrow. Thanks!
 
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Old 05-05-16, 07:12 PM
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Do yourself a favor and get a Grade 8 bolt. TSC has them for cheap. I bought some for 4.99 a pound Got 5 for a buck and some small bolts too ~!~!
 
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Old 05-05-16, 07:24 PM
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I would stick with the grade 5. Grade 8 is harder but if you hit something, the grade 5 can give, twist, or bend a bit more where the grade 8 is too hard/brittle and may snap and let the blade go.
 
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Old 05-05-16, 08:01 PM
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I agree with Cheese. The spec for a grade 5 is designed for a reason. Maybe cost, maybe hardness and strength. But who knows? Go with the original.
 
 

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