Reply To: 1955 Johnson 5.5 HP CD-12

[Harmattan1]

The compression was 75-80 when I did my readings. I did a couple reads and that was what I was getting. As far as the impeller, how can I determine if this is an aftermarket one or OMC? When I looked at the PO order at Amazon, it referenced OMC on the listing so I thought it was the right one. As far as the carb, where would I get another one? Best source?.
As far as the cylinders, i believe I did put some seafoam in both and turned the engine by hand to work it into the cylinders and just let it sit a few days before doing anything further. I think the instruction to do that was in the post I was following when I first started last spring.
When I looked at the cylinder walls, they appear smooth with no scoring that I could see. I will double check them again using the procedure you suggested.
I will open the screws and let the gear case drain tomorrow and see what the fluid looks like.
I do have the new head gasket and will review the manual before I do anything. I will get back in touch as soon as I find out more and take more steps. First thing I have to do is locate a replacement carb. If you have a suggestion to find one, let me know and I will look there first.

Thanks so much for all your info and suggestions. One day this thing will be as good as new. Cant wait..