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Briggs advice on cylinder bore


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Well for those of you who might be wondering what became of my odd sized piston/bore combination, (per my earlier post this week), I ended up calling Briggs' tech line, and this is what I found out. They assured me that I did in fact have a .020 over piston, despite the fact that it only measured 3.009". They told me what Dave told me in his reply to my earlier question. "Tell your machinist to cut the bore to 3.020" and quit worrying about fitting the piston to the bore. If it's bored to the correct dimension the clearances will be right. So I took it back to the machine shop and told the machinist to cut it all the way out to 3.020" He shook his head, but he did it anyway, and what do you know, now the rings fit with the correct end gap. When I asked the Briggs tech about what I considered excessive skirt clearance, (.011") he laughed and said, "It'll be fine, that's the way it was designed to run". So there it is, just wanted to share my experience, cause it was a first with me. I've had three Kohler's bored this summer, and never had a problem. Learn somthing new every day I guess. Thanks to everyone who answered my call for help, you guys were right!
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