Ok I just received a Johnson SeaHorse. My buddy had it running last year when he put new plugs and propeller. He ran it for a bout 5 mins and then put it way in his basement till he dropped it off. The problem is that the pull rope is not wanting to move, I took the cover off and tried turning it by hand and no luck wont move. A neighbor said that I would take the plugs out and spray WD-40 in the plug holes. he said to really hammer it and then let it sit that it could be scale in the piston walls. Any help would be great I know the motor ran a year ago. I'm kinda lost here.