Since I bough the 1986, 150HP, V6, Johnson outboard, the reveres never works. As I read here I take the shift cable off at the motor, and shift it manually, it didn?t works, each time I can hear load teeth noise. I think the problem with the gears. I did open the lower unit but the gears was sealed and I didn't know how to go forward to see if the problem with the gears. Any help will be appreciated and need the parts that need to replace.