75 johnson 115 sparks one day and nothing the next

[lonnie]

this is a project boat that set for years. at first it had no spark at all then it just fired off the next day. the last time i had it running i took it to the lake , it started and ran great.i took it home did some work on the boat,not the motor, and now i can not get it to spark on any of the 4 cyls.info i am starting with the batt from my truck,cleaned all the connections i find and looked for bare or broken wiring .dont have a meter yet but would'nt know what to look for exactly.trying to help out mom,dont know much about marine motors.T I A lonnie.

 

[Joe Reeves]

Re: 75 johnson 115 sparks one day and nothing the next

Lonnie.... Remove the s/plugs. Crank the engine and double check to see if there's spark. If not, remove the black wire that has a yellow stripe from the powerpack. Now, recheck the spark. If you now have spark, in all probability, the ignition switch has failed. Let us know what you find.<br /><br />Note, you can crank and check for spark by having the s/plugs out, the ignition key on, and use a small jumper to connect from the battery side of the starter solenoid to the small 3/8" nut terminal of the solenoid (but not the 3/8" ground nut).

 

[lonnie]

Re: 75 johnson 115 sparks one day and nothing the next

mr reeves, i disconnected the black wire with yellow stripe and it did not help. is that the kill wire ? i cant seem to confirm which wire is. i tried a few things yesterday , im not sure it helped ,but i took apart the shift box and cleaned the wires and tried to make sure there were no bad wring ,didnt find anything but corrosion. when i put it all back together the first time i turned it over it started , and started the rest of the day. this morning i tried to start the motor and nothing!!