Bought a compression tester because I like owning the tools I am using. Readings were taken before and after injecting a little oil in the cylinder. Cold engine. I don't like burning myself on that hot manifold.
#1 85 --- 85
#2 90 ---95
#3 105 ---110
#4 90 --- 95
Looks like maybe the valves may be leaking a little.
I was right about the carb. When I idled it down and pulled the drain plug the gas flowed free.
That is a counter intuitive test. Opening the carburetor and dumping out raw gas with the engine running isn't a test I would ever perform on a car or truck engine. Just sounds like a good way to blow something up in a ball of fire.
Put new plugs in it and started it with no choke, and standing on the ground beside it. Sounds like it is running good. Going to take it out and see how well it will pull the brush hog through ironweed.