Motor won't shut off

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Daniel19

Cadet
Joined
Apr 16, 2006
Messages
11
My boat has a 50 HP Mercury that won’t shut off when I turn off the ignition switch. I have to pull the gas line to let it run out of gas before it will stop. I’ve replaced the ignition switch to no avail. The problem used to be intermittent but now happens every time. Sure seems like something electrical in the motor – maybe the magneto has to be grounded in order to shut the motor off…? I don't know much about the insides of these. Are there some wires I can check? <br />Additionally, the shift linkage won't allow me to increase throttle without engaging the prop... <br />Thank you for your time!<br />Daniel
 
B

Beacham

Seaman Apprentice
Joined
Mar 20, 2006
Messages
46
Re: Motor won't shut off

have a look at my thread from about two-three weeks ago, titled "engine won't shut off!" the powerpacks have to go to ground via a black wire with stripe when you turn the key off. if there is a disruption in that circuit, it is likely at the power pack, but could be anywhere anong the line to or from the key switch
 
W

Walker

Captain
Joined
Jun 15, 2002
Messages
3,085
Re: Motor won't shut off

Post this on the Mercury forum for more detailed answers from Merc people.
 
D

Daniel19

Cadet
Joined
Apr 16, 2006
Messages
11
Re: Motor won't shut off

Thanks for the tip - I'll go have a look at that thread. I'm new to the forum and am not sure how to find the thread, but I'll see if I can find your user name and search that way. Thanks again!
 
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Daniel19

Cadet
Joined
Apr 16, 2006
Messages
11
Re: Motor won't shut off

Thanks for the tip - I'll try to find that forum - didn't see it the first time around...
 
M

Mod2

Senior Chief Petty Officer
Joined
Jun 19, 2003
Messages
713
Re: Motor won't shut off

Moving to Merc/Mariner forum.
 
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