I am looking for some advice from you learned ribnetters. I bought an ancient Yamaha 5hp (5C6E3 single cylinder water cooled, integral fuel tank) off fleabay for refurbishing as an auxiliary for my Avon. The engine runs fine, but the gear changer is seized. I have taken the lower unit off, and thankfully the gearbox is fine, it is the connecting rod from the gear change lever that is seized. I have tried lots of WD40, but to no avail.
I think I need to dismantle the top end to get to the mechanism that changes the rotation of the lever shaft on the side of the outboard to the up and down of the shaft connecting to the gearbox.
I loosened off all of the bolts I could see on the underside of the powerhead casing, but nothing seemed to move, and I did not have the courage to remove all the bolts completely in case the whole powerhead fell off!
Any advice gratefully received.