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Garden Tractors / Mowers / Scooters

Briggs and Stratton Model N That Smokes. What's the fix...


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  #21  
Old 01-15-2018, 05:20:29 PM
R Davis R Davis is offline
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Default Re: Briggs and Stratton Model N That Smokes. What's the fix...

Thanks gdstew, it could be worse, eh? lol

I guess the first thing to do is find what the difference is supposed to be between the piston's diameter and the bore's ID, then hone the bore 'til it's clean first, then to fit an oversized piston.

Telescoping bore gauges aren't a lot of money, so I can gear up to do the measuring myself.

Thanks again...

---------- Post added at 04:20:29 PM ---------- Previous post was at 03:59:58 PM ----------

Ok, I can buy a set of telescoping bore gauges for 15 bucks, that's what I'll do next. Maybe someone will chime in with what the fit's supposed to be between the piston and bore.

Sounds like I need to know what the bore looks like, then I can go from there...
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Old 01-15-2018, 05:27:59 PM
Andrew Mackey Andrew Mackey is offline
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Default Re: Briggs and Stratton Model N That Smokes. What's the fix...

Yes, bore will have to be compared to specifications. With the piston .005 out, the cylinder probably is worn at least to the point where it will have to be oversized. You have to look at availability of oversized pistons before machine work is done. Won't due to bore .020 over, if you can't get 20 over pistons! I believe that the original bore was 2", with the piston slightly under to allow clearance.
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Old 01-15-2018, 07:52:16 PM
R Davis R Davis is offline
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Default Re: Briggs and Stratton Model N That Smokes. What's the fix...

Andrew Mackey... I've already looked at piston availability. From standard to .030 over in .010 increments are in stock.
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Old Yesterday, 12:36:33 AM
gdstew gdstew is offline
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Default Re: Briggs and Stratton Model N That Smokes. What's the fix...

Cylinder is suppose to be bored to 2.010, 2.020, or 2.030" The pistons are made under size to fit.
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Old Yesterday, 03:03:30 PM
Andrew Mackey Andrew Mackey is offline
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Default Re: Briggs and Stratton Model N That Smokes. What's the fix...

Stock bore 2", as posted earlier. Mic the bore and see what you come up with. These old cast iron engines were pretty tough if only one or 2 thousandths out, a honing/glaze breaking and a standard piston may work. If more than that, an overbore is warented. All depends on what you come up with on the bore diameter.
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Old Yesterday, 04:39:07 PM
R Davis R Davis is offline
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Default Re: Briggs and Stratton Model N That Smokes. What's the fix...

I've ordered a set of bore gauges, so I'll know within a few days what I'm dealing with. I'll check back in when I've got some numbers...
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