Re: 40 hp Johnson
I believe that is an electric shift model. Those are a pain (and expensive) to fix if not working. If the motor was tuned up, tested and running good/shifting good, it may be worth $250-300 around my area - maybe a little more if you have all the controls. A lot depends on the area you live and who may be interested in that particular motor. In unknown condition, I wouldn't pay more than $100 for it.
