Motor won't shut off

[Daniel19]

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

 

[Beacham]

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

 

[Walker]

Re: Motor won't shut off

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

 

[Daniel19]

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!

 

[Daniel19]

Re: Motor won't shut off

Originally posted by Walker:<br /> Post this on the Mercury forum for more detailed answers from Merc people.

 

[Daniel19]

Re: Motor won't shut off

Originally posted by Walker:<br /> Post this on the Mercury forum for more detailed answers from Merc people.

 

[Daniel19]

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...

 

[Mod2]

Re: Motor won't shut off

Moving to Merc/Mariner forum.

 

[studlymandingo]

Re: Motor won't shut off

Move your cursor over the red search button at the top right hand side of the page.<br /><br />Have you checked your ignition switch to see if it is the offending part?

 

[Motor Boater Bill]

Re: Motor won't shut off

Post your serial number and we can be of more help. Wire color for the kill switch varies from one model to another.

 

[andy6374]

Re: Motor won't shut off

I bet it is your kill switch, if it is damaged you can't "electrically" kill the engine. Does your kill switch have a good ground?