'72 50hp Evinrude outboard won't shut off!!

[Jmanq]

Hi, I am new to this forum so please bear with me and thanks in advance. Just bought a boat recently and owner said it had been run 3 times this year. Boat was not idling (kept on putting out), so I brought it to a mechanic, who told me to replace the fuel pump and fuel hose with primer bulb.
So, I replaced the primer bulb and fuel line and seemed to be ok. Also opened up the fuel pump and re-assembled and all seemed to be ok. Also cleaned the 2 carbs completely, and replaced fuel in tank with new fuel.
I got her running, however now I can't get the engine to shut off with the key. In a panic, I pulled the fuel line off and disconected the battery, but it still ran for about 2 mins before finally putting out. Is there something wrong with my ignition swich? Is there a way to put in my own kill swich? How can I prevent this from happening in the future if it is my ignition swich? I looked at the swich and all seemed to be ok. Any advice? Thanks again. -J

 

[phipps]

Re: '72 50hp Evinrude outboard won't shut off!!

Do you have a hydro-electric drive? If so, the blocking diode in the control is likely bad. Do you have a manual for your motor?

 

[Jmanq]

Re: '72 50hp Evinrude outboard won't shut off!!

First off, its a '73 2cyl 50hp evinrude, sorry. I'm really not sure about the drive, I don't have a manual or anything except for serial # and model # which I'll have to post another time. Does anyone know about the wiring in the control box? Which wires shut off the engine when I turn off the key? Where are they connected to in the engine? (power pack? under the flywheel?) thanks -J

 

[tashasdaddy]

Re: '72 50hp Evinrude outboard won't shut off!!

NEVER disconnect the battery on a running motor. Never get the cables backwards, it will blow electronics. it probably has a bad ignition switch. Black W yellow tracer is the kill wire. see this one, http://forums.iboats.com/showthread.php?t=341160

 

[phipps]

Re: '72 50hp Evinrude outboard won't shut off!!

First off, its a '73 2cyl 50hp evinrude, sorry.

If its a 73 then I dont believe it would have a hydroelectric drive, think 72 was the last year for those.

My comment only applies to hydroelectric drives so you can disregard.

 

[wilde1j]

Re: '72 50hp Evinrude outboard won't shut off!!

Shutoff using choke or disconnect fuel until fixed. DON'T panic!