Reply To: 2hp knock

[Mumbles]

The rods needles and liners can wear down. I believe they are the same as ones used in the six horse motors and are getting harder to find new. OMC says the lower crank bearing has to be replaced along with its housing but that isn’t true. I’ve pressed them out to change the seal and replaced them with off the shelf bearings. You replaced the piston? Was it used or a new one? A used one could be worn causing piston slap which can be confused with a knock. If the motors was run on 100:1 for a long time, everything inside could be worn out.