Thanks for all that, Bushwacker!! All very valid checks before acting. Yes, all that was just done, since at first I thought a motor issue. Tach is very close, height is right, compression good, timing, spark and throttle adj. is good. This is what finally led us to the propping......when all the rest checked out okay.
I do not have a factory manual, but saw one where stated 5000rpm is right. It did not indicate a range. This factory manual covered only a couple hp engines of this vintage, which included the 150hp. My model is E150EXETG.
Thanks for covering these items.......I should've mentioned steps I'd already taken to get to the idea of the prop being the cause.
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