I justbought a 85hp rude 76 model (85693G) Sereal# (J0007213) Motor sat for about a year. So i got it all working and running good. >BUT< It will run great for about an hour (and then it starts) Loosing power when in max throttle its like i let up on the throttle and starts to surge up and down...But still idle's perfect and has a great hole shot. Could this be a fuel pump problem? and is it possible to bypass that pump and put in a small electric pump (mountng inside the boat) d