Flywheel not turning stuck

I tried turning on the boat today, but the flywheel seems to be stuck and therfore engine didn't start. Does anyone know how I can fix this problem?

 

I take it this is the old V4 Evinrude ? The flywheel cannot be turned (clockwise !) with your hands ? Not at all ?

 

I had that problem with an old Sea King 2 stroke. I solved it with a length of pine and a hammer. I set the end of the board in the teeth of the flywheel at a nearly tangential angle in the direction it was supposed to turn and tapped the other end with a hammer until the flywheel worked itself free.

 

I was not clear as to whether the starter hasn't the ability to crank the engine, because of battery or starter problems, or the engine is seized.

 

A screw driver on the flywheel teeth is typical, pull the plugs first. I wouldn't force it with a hammer, as you'll just tend to break stuff (knuckles first usually). A locked up engine is cause for serious concern, so run through the basics first, such as checking the starter drive. Now this can be cured with a healthy shot from a hammer, to un-freeze a worn out and stuck Bendix. The better option is to remove the plugs and starter, so the only thing that can prevent the engine from turning is something frozen to something, like rings rusted to cylinder walls or broken cranks.

 

With the plugs removed, spray plenty of penetrating oil in the cylinders, wait at least half an hour, then proceed as hoytedow describes. Work in both directions until the flywheel moves.

Next autumn put some oil in the cylinders before you store the engine!

 

It seems likely that saltwater ingress has occurred, if that is the situation it is a pull-down job, and likely not worth repairing. Once rust forms on the crank journals, it is goodnight !

 

After I freed the flywheel I got several more years out the previously dis-used engine. I only used light taps on wood until it moved. The hammer never touched the flywheel.