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I think what Guy is referring to is that not only do the shims set your pump timing, but the rotational setting of the pump is important for balanced fuel delivery and proper fuel shut-off. This can be adjusted using the thermal gun. If you have a machine that smokes after start up ( for a...

We're dying to know what the problem ended up being?? Did you have a lift pump issue or something else?

One thing that comes to mind, if the pump itself is good would be a problem with the cup under the pump that rides on the camshaft. Make sure it isn't either missing or stuck in the bore and not allowing full motion of the pump. The other thing to do would be to swap the pumps and verify if the...

Best thing I've found for the metering pumps is to get a gallon of the "soaking style" carburator cleaner and soak them for a couple days, that usually fe=rees everything up, but if you disassembled them and reassembled incorrectly you'll have to take it apart again. Unfortunately the few I've...

I don't think I've ever seen a schematic for the pumps.

It's difficult to say as far as the oil mist and crankcase pressure, without seeing it in person, but keep in mind, both pistons move up and down in unison not 180* apart, so pulsating air is somewhat normal. If the motor sounds like it is cranking too freely ( lack of compression resistance...