Reply To: 1956 Johnson 15HP Rod bearing clearance

[olcah]

I tried to compare the 56 FD 10 parts list to the Gale list that Frank provided above:

The Gale list shows that the crankshaft numbers differ.

The piston pins on the FD 10 and Gale have the same number, 203238

The con rod big end retainers on the FD 10 and the Gale have the same number 203244

The conn rod assembly on the FD 10 and the Gale have the same number but only for early Gale motors. 277205

Later Gale motors incorporate a needle bearing assembly 378251 on the small end of the con rod.

But that does not say the later rods are interchangeable.

I should just remove the rods/pistons from my motor and see if there is wear between the pistons and the wrist pins.

If there is wear on the pistons/wrist pins I would need to replace the pistons and pins and either replace the rods or bush the existing worn rods.

I need to find out if NOS parts are available. .

Then I need to decide about continuing to try and fix this motor.