Re: Beginning a CD-12 adventure – Antique Outboard Motor Club,Inc

May 24, 2015 at 2:56 am #16763

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Fleetwin,

This engine’s story is that it was purchased from an older AOMCI member that had it sitting in his garage with probably a hundred others for years. He didn’t know if it ran or what the compression was. My intent was to learn how to work on a 1950s OMC before I tackle a ’58 SSH 35 that I want to get running again. This little CD is my learn the basics test motor, but it is in decent shape so I hope to get it running.

I checked compression (which wasn’t good in the top cylinder), rebuilt the carb but had a leak in the bottom of the carb which I believe is due to a crack in the bottom of the filter yoke assembly and/or a leaky gasket. I now have another donor carb to pull a replacment part and a new gasket for the fuel filter bowl so I guess I could fix that issue and try again. Maybe I need to put it back together and try to start it again. The mag assembly looks pretty good and it has spark to both plugs.

I didn’t remove the head gasket from the cylinder head. It is still on there in the photos. I removed the exhaust port cover…screws were easy to remove…lots of carbon build-up in there. I also wiped the inside of the cylinders with a soft cloth and ran my fingers on the cylinder walls. Even though a dark streak makes it look like there is a gouge in the top cylinder, I certainly don’t feel one. It feels smooth to me. Looking at the pistons, the rings just look like stripes on the piston. Do they look correct?