Home › Forum › Ask A Member › Sportwin Crankseal help › Re: Fastwin Crankseal help
The O ring, which fits inside the carbon seal, is probably the culprit. It gets hard and cracks making a good seal impossible. The carbon seal rides on the bearing housing and seldom gives any trouble. If you replace the O ring, make sure to use an original OMC/BRP part for proper fit.
Both upper and lower crank seals can be replaced without splitting the cases. A snap ring holds the bottom assembly together while the top one can be serviced after removing the points cam. The carbon seal has two notches in it which can be used with two small picks to lift it out. I find small dental picks work good. Just don’t force anything or be too rough as the carbon seal can break quite easy.