Reply To: 1956 Johnson 15HP Rod bearing clearance

[olcah]

Fleetwin,
Yes, I am looking at clearance on the wrist pin end. The motion I have been seeing is between the rod and the wrist pin.

I have not noticed any slop between the wrist pins and the bore in the piston. That might be difficult to see unless the piston was out of the motor.

Good thought about possibly using rods from the 18HP (1957) motor. However if I installed some NOS rods they would probably last a long time.

I have a couple of MOV files that show the movement but they are too large to post here.

I think that the excess clearance is about 0.020 inch on the upper rod and 0.010 inch on the lower rod.

Thank you.