My 1984 40hp Yamaha had a bad oil pump in 1994. That is when I bought it with a bad hole. That is before Wesco even had pistons for them. Had to wait on them to make them. But, we bored all 3 holes .30 over. That was in 94. She will turn bout 6k rpm and fly.

Call Glenn at K&K Marine, Hot Springs AR. 501-767-9128. Pull power head and ship it to him. They can hook you up with it. Mill the head, port it. You name it.

My website. Page 1 boat racing in Hot Springs.