25 HP Mercury won't restart

[MARK T.]

25 hp Mercury serial# 6425504. Starts fine on earmuffs and when i first put in the water. After cruising to the fishing hole and shut it off it will not restart with the switch. The pull rope will start it fine. When I get it home it starts fine with the switch. When I try to restart at the lake all I get is a click at the motor.

 

[Barnacle_Bill]

Re: 25 HP Mercury won't restart

If all your electrical connections ar clean and tight, you have the common symptoms of a bad solenoid. You can verify this by jumping the 2 big wires at the solenoid the next time it just clicks.

 

[Yepblaze]

Re: 25 HP Mercury won't restart

Maybe it's just not charging and the battery has run down. Check for 14 or more volts while running briskly.<br /><br /><br />I think I'd wiggle the battery connections and take voltage readings at the <br /><br />Battery<br /><br />All three posts of the solenoid<br /><br />And the starter post<br /><br />Both during the times it starts and times it doesn't.<br /><br />The battery should have at least 11 or more volts at all times even when cranking over that motor. Almost 13 volts just sitting there fully charged.<br /><br />The little terminal at the solenoid should have 12 volts when in the start position.<br /><br />One side of the solenoids big connectionds should be 12v all the time and the other 12v when starting.<br /><br />And 12v at the starter post while in the start position.<br /><br />Also there should be zero volts between any metal part of the motor and the negative terminal on the battery during attempts at starting.