Those 470's were excellent engines. Total Mercury design, block and castings. If I remember they had Ford tractor crankshafts, turned around 5000 rpm's @WOT. Not sure why Mercury abandoned the design, I think they also had a 485 as well. 4 cylinder 185 hp and light weight.
I actually like Amberjacks! Beauty boat!!!
Sweet
Quote from: "seabob4"I actually like Amberjacks! Beauty boat!!!its one of the few searays i like, we did have one in our marina last summer that was done even more than ours, it had new 350 mags and bravo 3 drives, radar arch with outriggers... man that thing was nice
Your pitting? Corrosion. Remember, the zincs are attached to the motor, the motor comes in contact with the aluminum trim, hence, guilt by association, the corrosion, or electrolysis, shows up in the aluminum...