New boat owner - heard I should replace the lower unit oil. Then one guys says, "Be sure to fill it from the bottom until it runs out the top screw." Seriously? Do I unscrew both top and bottom, but fill it from the bottom hole and just fill it up to the top screw, or what? So, why are...
Everybody has an opinion on this one, but nothing has worked yet....<br />My 1973 Johnson 65 horse starts great, runs at medium speed great, but when we get past the 85% throttle point she starts to bog down and will periodically surge every couple of seconds at full throttle. If we back off...
