Yup, AVB has it. The BPMR7A is a fair bit 'colder' plug than the correct BR2-LM, and will foul easily.

Some more detail on static setting the governor, from the Briggs FAQ:

Quote
Adjusting The "Static" Setting On A Mechanical Governor

The following procedure eliminates play in a mechanical governor between the governor crank (the arm that protrudes from the crankcase) and governor system components inside the crankcase. This procedure does not apply if your engine has a pneumatic governor.

1. Loosen the clamp bolt on the governor crank until the governor lever moves freely.

2. Move the throttle plate linkage until the throttle plate is wide open. (To find the wide-open position, first position the throttle lever against the idle speed screw or a fixed stop plate. The throttle is wide open when it is all the way in the opposite direction.) Note the governor arm's direction of rotation as you move the throttle plate to the wide-open position. This is important for the next step.

3. With the throttle plate wide open, use a nut driver or wrench to turn the governor shaft in the same direction that the governor arm traveled.

4. Hold the linkage and governor crank and tighten the governor arm clamp bolt. Move the linkage manually to make sure there is no binding.

You are correct on the air cleaner gasket too; the primer relies on a good seal there, to pump air into the float chamber via the vent.

Cheers,
Gadge

"ODK Mods can explain it to you, but they can't understand it for you..."

"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."