Reply To: 1955 Johnson 5.5 HP CD-12

[Don]

OK, sounds like you are going to need another carburetor, at least the upper body. There is nothing you can do to repair the carb body casting if the ears for the float pin are broken….So, the stuck inlet needle seat is an issue you won’t have to worry about. But, you are correct about the throttle/choke shafts, you should not attempt to pull the choke or throttle butterflies of of the shafts…There is no need to do this anyway. A good soaking or ultrasonic cleaning will take care of any corrosion/dried grease.
So tell us everything you plan to do with this engine.
Usually, these engines need the following:
Ignition plate rebuild- new wires, coils, points and condensers
Clean and rebuild carb, replace fuel/air hoses
Remove powerhead, then remove gearcase….Drain and inspect gear lube to determine whether or not it needs to be resealed….Inspect impeller housing and SS plate, replace impeller…
If the gearcase has water in it, or the lube is milky, you will need to pressure test to determine exactly what is leaking. Once the leak area is determined, then the gearcase can be pulled apart. Once apart, it is best to replace both shaft seals, shift rod oring, prop shaft bushing oring, and upper bushing/seal cover gasket. You will need to inspect the seal surfaces on the shafts also. Once the unit is back together, you will need to pressure test to ensure it is sealed properly….Even the slightest leak is unacceptable.
So, post pictures of the parts you have and intend to install. Let us know if you plan to actually rebuild the powerhead, like I say, this is usually not necessary, but pulling the head to have a look inside is a good idea. Did you do a compression test before began?
There are just too many details to post here, but we will try to get you a link to a decent service manual…
I will let someone else advise about repainting, I have zero talent in that area….