I can not get my egine up hight speed. I have a 15 hp evinrude twin cylinder worktwin engine and a 12 ft. aluminum boat. The max speed I acn get it up to 5.5 miles per hour. I need help.
I have an Evinrude 15hp Worktwin. It starts great and run OK. The problem is when I put it to fast it does not rev. up to high speed. I also have an 7.5hp evinrude and it seams to twice the power. What can I do to fix the problem.