Home › Forum › Ask A Member › 1959 10 HP Evinrude Sportwin › Re: 1959 10 HP Evinrude Sportwin
The wear will usually be in the wrist pin bosses of the piston. Boring put the bosses & rods to use an over size wrist pin would work for a while, but just weaken a bad situation & make it worse. I believe it is the duty cycle the motor is run in that pounds out the bores. Running WOT at low RPM near peak torque is hard on components. Since boat loads change in small boats constantly it just depends on how long the motor runs this way as to amount of damage? The wear is cumulative. My experience with larger engines that have full compliment bearings has proven this out.
If you have the Common parts reference guide it shows you the parts for the later QDs will fit back to the original 1949 motors.
Dan in TN