i am new to thi forum and just recently bought a john boat with a 1979 johnson 55 hp. the problem is i do not have any spark i pulled the fly wheel off and emery clothed the magnets but still nothing. i used a multimeter to check if there was any power coming from the coil wires but nothing. could these magnets go bad over time or the coils?
If your coils have any goo leaking around them or are cracked you won't get spark. It is odd that they would all go at once. The magnets are probably not your problem. Have you had this engine running in the past or is it new to you?
ok taking the black wire with yellow stripe off made the spark work on the bottom cylinder. thank you very much. the top cylinder still has no spark could this be a coil? i swapped the spark plugs and both work on bottom cylinder.
i switched the coils and both work now. loose wiring maybe on the bottom one maybe. i switched them back and the spark works now. i got the motor to run by pull starting it the starter wot turn the motor over fast enough to make spark. i am going to try cleaning up the terminals. thanks for the hep. where is the cheapest place to get a service manual?
Ebay. Get a used factory service manual. Do not get a clymer or seloc. They are junk. Glad you fixed it yourself, now hit the water.
Take all the wiring connections off pertaining to the starting circuit, and file them to a shine, then re tighten. This includes at the battery, starter, solenoid, and engine ground. Also check for nicks, cuts, and abrasions in the wiring. "Crunching" when you flex it is a sure sign of corrosion. VOltage drop testing is a good way to troubleshoot this.