Good day. I have a very small water leak from the freshwater circulating pump Bavaria 42 2000. . This is behind the plastic covers on my MD22 55hp. I have started the job and removed the cam belt, with all pulleys locked in position but cant remove the main crankshaft pully. Is there a secret to getting the main lock nut off. The boat is in the water so I cant put it in gear and lock the prop. How do you lock crankshaft so I can undo the nut. Also I cant figure out how to lock the fuel injector pump once the injector drive wheel is off. Is there any U tube videos. Thanks Terry.