Timing could be one of the problems, but that is only 1 of a hundred things that could cause your problem.
Low battery, loose (wing nuts by hand are not tight), corroded battery cables (check both ends of both cables)
(The battery only reads 11 volts, I tried jumping it but it still spun slowly. Even with the battery charger it will only get to 11 volts it needs to be replaced.I tried using another deep cycle battery from my trailer that was fully charged but it still spun slowly)
Water in the cylinders. Pull the plugs out and see if it cranks faster.
( I will try that)
Might try pulling the upper gear box off the drive to make sure it's not the drive. Could also be the bearings in the flywheel housing if there was water in the ujoint bellows. If they are really rusty, it can slow the engine down.
(I am not sure how to pull the upper gear box but I will look into that. When I took the starter out the flywheel did not look rusty from what I could see)
Just curious, why did you replace the coil if you can't even crank the engine over at full speed?
