Bubba I have a 1979 100hp johnson that has 3 bad cylinders. I thought about building it but got another engine instead. I dont think the 100 is worth keeping but I hate to throw away a good lower unit. My question is how to remove it. I have removed every visible bolt and can move the lower unit from side to side and it will seperate some but refuses to come off. There were two bolts on each side and one under the trim tab. I also tried to remove the power head but same results. The head will turn but wont come off. I am sure there are no bolts left in it. I even suspended it on a cherry picker and it wont come off. I feel like Im missing something really simple. I've replaced several water pumps before with no problem. I dont have the model #. Thanks.