My son bought a Massey 8H and after doing an engine transfer with another 8hp Tecumseh, we are having trouble getting the RPM's out of it. Right now, with the governor set up according to the manual, when you lift the throttle lever to full open, we are lucky if we have 800 RPM's. It appears that the governor is open all the way, the same goes for the carb throttle. Any ideas as to what might be wrong?
We get plenty of gas to carb, as with the air cleaner removed, you can literally feel and see the gas on your hand while holding it in front of the carb. I should also mention that I put a cap full of seafoam in the gas tank to try and clean the internals a little. One concern I have is, the gas tank only had a little bit a gas in it, and I'm wondering if the cap full of seafoam was too much? Could the seafoam have removed that much corrosion already, to clog up the carb already? Might be a dumb question, but if the throttle needle is clogged, would this keep the engine from producing the higher RPM's? It's hard to set the air intake adjustment without the engine running it's full RPM's, so I'm eliminating that adjustment for now, as I really don't see that interfering with the RPM's, correct?
I'm not much of an engine guru as some of you guys are, so if these are dumb questions, then I accept the classification. I'm getting frustrated as this isn't a brand that I'm used to working with. Any help and advice would be greatly appreciated.