Have Boat Questions? Ask a Boat Repair Expert.
Hello my name I Jason, whom am I speaking with? Will the engine spin over any easier with the plugs out? Did you check to see if there was gear lube in the lower unit?
If there is no oil in the lower unit and that is seized up that would make the engine hard to turn over as the lower unit is coupled to the engine via a driveshaft. So you would definitely need to check that. Did you have any further questions for me?
There are seals under the water pump assembly. Chances are the oil seals, and most likely the driveshaft as well, are shot.