In regard to a couple areas on the carb where I might find it necessary to do some slight corrosion removal, I am wondering whether the particular compound I have would be appropriate for either area. I understand that Briggs has a product available, a fine valve lapping compound (part #94150) but that is not readily available in my location. Instead I happen to have a Permatex product, a valve grinding compound 34A, which is described as “not having a grit rating but uses silicon carbide for abrasive action. It starts out coarse and with continued use from an application the silicon carbide breaks down and begins to produce a smoother surface”.
Referring back, these two areas are at (1) the lower nozzle seat, and (2) the float needle seat, mentioned (and quoted below) in previous responses this thread:
(1)
sometimes older carburetors developed leak problems at the lower nozzle seat due to corrosion. The 1996 briggs update detailed a repair. using a spare nozzle, the threaded area was ground off. Valve grinding compound was applied to the seat area and the nozzle inserted into the lower carburetor body. Using a screwdriver, the nozzle was turned in an attempt to polish the corroded area.
(2)
If viton tipped needle/seat leaks, the seat can sometimes be burnished/polished with a Q-Tip and some valve lapping compound (extra fine 220 grit or better) if necessary - if you don't want or don't have a replacement seat for that needle.
Any comments appreciated.
