1968 Johnson 9.5hp

[cary00silve]

I am going to look at a 68 johnson 9.5 this weekend and was wondering if there is anything in particular I should look for other than the usual compression, gearbox, coils, etc?

 

[JB]

Re: 1968 Johnson 9.5hp

If there is a "common" problem with the 9.5s it is exhaust gasket failure that leaks exhaust into the cowling and kills the engine.

 

[cary00silve]

Re: 1968 Johnson 9.5hp

If there is a "common" problem with the 9.5s it is exhaust gasket failure that leaks exhaust into the cowling and kills the engine.

Ok, well how would I determine if this motor is leaking exhaust into the cowling? Does this destroy the motor, or just kill it while running?

 

[pgdignan]

Re: 1968 Johnson 9.5hp

look for evidence of exhaust gas in the cowling (e.g. smoke/oil stains)

 

[iwombat]

Re: 1968 Johnson 9.5hp

It's not so much the exhaust gasket as it is the shift shaft seal. It's going to be tough to figure out in a barrel, since that motor will almost always suck up exhaust gasses in a confined space. Also, that seal is just about impossible to see w/ disassembling the motor.

Run it in a barrel. If you experience some, but not a lot, of effect from exhaust gasses you're probably okay.