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MikeG

Valve Seats for Briggs

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MikeG
I was having trouble with my Yeoman 616 engine, not starting and it didn't seem to have much compression. I removed the head and found that the intake valve seat had come out and was holding the valve in the open position. Upon inspection I discovered that this had happened before because there is centerpunch marks all around the valve seat, someone tried to do a quick fix. Is this block salvagable or do I need a new one? How are valve seats originaly held in the block, are they shrink fit? MikeG

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Scott Salmons
That is the way that valve seats are replaced, the metal is peened over to hold the seat in. Maybe all you need to do is take a punch and re-peen it. The Briggs manual says to peen three equal spaces to center the seat then peen several times around the total perimeter.

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Bunky
I had this same thing happen on a Yeoman I had i just repeened it and it seemed to be ok I sold it so can't tell you if it's still holding up ....

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davejs
I had a 16 Briggs redone last year for the same problem. After checking the cam (looked worn) lifter,cam and valve all had to be replaced. Shop said one took out the others in domino style. Open it up and start to measure parts.

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MikeG
Thanks for the info guys. I'm going to try and put it back together with some Loctite retaining compound and re-peen. Hope it holds, the engine is pretty worn. I'm working on an 8hp replacement for it, but probably won't have it ready until fall. MikeG

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