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Donald, Small Engine Technician
Category: Small Engine
Satisfied Customers: 2075
Experience:  I have 25+ years of experience repairing 2 & 4 cycle engines
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I already did once. My new briggs & stratton 16 hp

Customer Question

I already did once. My new briggs & stratton 16 hp vanguard engine has holes for the mounting bolts that are not the same diameter all the way down. 3/16 at the top 3/8 at the bottom. All the bolt holes are the same . Whats going on???
Submitted: 1 year ago.
Category: Small Engine
Expert:  Donald replied 1 year ago.

Thank you for requesting me. Can you get the type numbers from your engine? I will pull the specs up for your engine.

Customer: replied 1 year ago.
briggs 16 hp vanguard engine
model 305447
type 0568-f1
code 14100311
Expert:  Donald replied 1 year ago.

Thanks for this information. Are your holes already tapped?

Customer: replied 1 year ago.
The bolt holes are not threaded neither top nor bottom part.
Expert:  Donald replied 1 year ago.

I do apologize for the delay in responding to you. I was away from my computer. I am back now.

Customer: replied 1 year ago.
still wating
Expert:  Donald replied 1 year ago.

Hello. How are you today? There are two ways to resolve our bolt situation.

  • You can use a good quality 3/8" self tapping bolt. Although your holes are 3/16" at the top , this size bolt will work for you. Just make sure the bolt is a good grade, hardened steel bolt. Also, use plenty of lubricant, as you are tapping your holes. Take your time, and this will work well for you.


  • Or you can also use a good grade, hardened steel, 5/16" bolt, with two flat washers, a lock washer, and a nut. This will work for you as well. Just put a flat washer under your frame, and a flat washer, and lock washer on top of your block , before you put your nut on.
Expert:  Donald replied 1 year ago.

We can continue from here. Thanks!