Re: 25hp evinrude 1971
Or it's running on just one cylinder. Pull the sparkplugs and see how they're burning. If one looks significantly unlike the other, it usually indicates a problem.<br /><br />Could also be a spun prop hub if the motor is fully revving but going no place fast. They (hub) can be replaced, but a new prop isn't much more expensive.<br /><br />Welcome to iboats.
