Re: 64 johnson 5.5 help
If you're saying that the engine is very hard to turn over such as grabbing the flywheel with your hands and turning it..... drop the lower unit to determine if the problem is a dragging lower unit or if you've assembled something incorrectly.
You don't explain if your problem is as above or if the engine cranks over normally (rotates) but simply won't start.
If you by any chance resurfaced the sealing surfaces of the crankcase halves excessively, that would apply pressure to the crankshaft. If this isn't the type problem you're having, it will require a more defined explanation.