1965 33hp super seahorse

[imported_Matt_P]

Ok I have my engine all hooked up, starts fine choke works great all electircal works but when I turn the key off the engine doesn't shut off. Does this have something to do with the vaccum cut off swtich? I don't know I am stumped any help would be greatly appreaciated. oh and does the Vaccum cut of swtich have to be hooked up or can it be bipassed some how cuz I only have 2 wires that say thats what there for there is no cut off switch.

 

[Paul Moir]

Re: 1965 33hp super seahorse

The vaccum cutout is a necessary item. If you disconnect it, when you chop the throttle (suddenly close it) the carburetor runs rich. If you chop the throttle in neutral, that extra fuel will feed a run-away, which is where the engine spins up to incredible RPMS all by itself. Often, the only way to stop it is to pull the choke & fuel and wait for it to run out. That is to say, often the kill switch won't have an effect.<br /><br />The vaccum switch cuts spark to the bottom cylinder, which stumbles the engine until the vaccum clears. It also functions somewhat as an overrev limiter.<br /><br />If it's not functioning properly, do not operate the outboard in neutral.<br /><br />Here's a wiring diagram for a '64 28hp I drew. Yours should be the same (exclude the regulator, fuses, and generator if not present). Follow the thin black wires that come from the ignition system, up underneath the flywheel. Those need to be shorted together by the two M terminals on the keyswitch to stop the engine. Never let them see +12v.<br /><br /> http://www.files.bz/files/3414/28schematic.PDF