hello. i hope i am in the correct fourm. i have a 1958 johnson 35 hp motor. the problem i am having is when i start the motor it runs for about three seconds and then misfires so hard it sheers the key in the flywheel, its not a misfire like (BANG) (POW) OR (BACKFIRE) its more of a hard yank on the motor, almost like it tries to fire both cylinders at once, or turning the key off and on real fAST. i have not ran this motor in sometime but when i did it always yanked like this at idel just not as bad, if i remember correct it stoped when i got moving. any help would be appreacited. also does anyone know where i can buy more of these keys, i have been making them and ther a pain in the butt! THANKS AGAIN