motor turns over on its on

I have 90hp mariner outboard motor. I turn key on to start motor after i turn key to off positions the motor keeps trying to start on its on. starter or wiring.any suggestions?

Re: motor turns over on its on

Likely to be a bad solenoid or bad key switch. I'm thinkin' solenoid!

You can check to see if the switch is causing problems by disconnecting the yellow wire (solenoid 'hot' wire) from the small terminal on the solenoid and measure for voltage with a meter or test lite. Turn the switch on and off a number of times and see if you get voltage on the wire with the key in the "off" position. If so, replace the switch.

But I'd bet on the solenoid. Usually the contacts burn out and then they just "click" without energizing the starter, but it's not unheard of to have them stick like you described. Sometimes you can give the solenoid a sharp 'rap' on the side with the handle-end of a screwdriver and it'll jar the contacts loose. But they'll stick the next time no doubt!

HTH, let us know what you find........ed

Re: motor turns over on its on

I'm no expert but it's either the starter solenoid or the key switch. One of them is sending current to the starter. Search this forum for how to check both of these. Hope this helps.
KS