"Bob Engelhardt" wrote in message ...

The engine on my leaf vac wouldn't start & I diagnosed low compression.
It's a 5HP B&S. Here's a picture of the exhaust valve seat (after
lapping):
http://home.comcast.net/~bobengelhardt/ValveSeat.jpg

Does it (the seat) need to be replaced? The B&S Repair Manual says that
after replacing a seat, it needs to be cut. How important is the
cutting? I'm not about to buy a cutter & I'll take the engine to a
repairman instead.

Thanks,
Bob

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[reply]

If you're going to take it to a repairman anyway, ask if he thinks it can be
reamed, rather than replaced. If so, have it done, and then lap it again.

It's hard to tell how deep those pits are, from the photo, but it's worth
asking.

--
Ed Huntress