1956 Johnson Javelin 30HP Question #1 etc

gjonz

Petty Officer 3rd Class
Joined
Sep 20, 2008
Messages
76
Okay...here we go. I tore into my 1956 Javelin tonight, which still needs one "Javelin" script logo incidentally (should you have a spare lying around.:D),and found the following (Being a novice to this type of thing.)

1. Pulled the lower unit and the spaghetti type gasket is "vaporized". Not much left. The gear box shifts well and turns nice and quietly by hand. It had lube in it still which I drained. Anything else to check while I'm in the neighborhood?

2. Pulled the head which had obviously been leaking just a tad at the gasket, which I wanted to replace anyway. I found the following of which I am not sure how to clean up;

a. Pistons and inside of head crusted with oil. Cylinders are clean. What do I use to clean this caked on oil off?

b. Cylinders each have very minor scoring...about the same place in each cylinder (lower right hand side). The compression tested well, and the pistons seem "tight". Do I worry about this?


3. It would appear the coils, condensers and points have been replaced at some point. IE; the coils are greenish looking plastic with OMC on them, and the condensers and points look very clean. I will still need to pull the flywheel to replace the plug wires. How can I tell if these other parts are new? Or should I just replace them anyway?

Thats all for now, but I will close with a picture or two.

Thanks for any help in advance!

Greg
 

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Basher

Petty Officer 3rd Class
Joined
Oct 8, 2007
Messages
82
Re: 1956 Johnson Javelin 30HP Question #1 etc

While you have the lower open check the clutch dog for wear and might as well go ahead and change the water impeller, unless you know when it was last changed I would make sure that your cooling system functions properly.

In regards to your electrical system did you check for spark prior to opening the flywheel, if everything is functioning you can check for spark without starting the motor.

In regards to your grungy looking cylinders don't worry about it a good decarb with seafoam will clean your motors internal parts up nicely as well as probably increasing your compression.

Other then that, a good once over of the motor checking everything is tight is a good idea and probably a carb rebuild will be in order.

Good luck and enjoy I rebuilt a '56 FD-10 last winter and I love it

Basher
 
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