Johnson 115 high voltage

[jeremyeasen]

I have a 1991 Johnson 115 and have been having tach problems. The tach has power, but doesnt register correctly. My first check was the regulator/rectifier and checked voltage at the battery cables, while disconnected from the battery. I am reading about 25 volts while hooked up directly to the cables and eliminating the battery. any advice? Also, if something had gone wrong with the regulator/rectifier, could that have fried my overheat warning horn, because it quit working at the same time. thank you for any advice.

 

[Trent]

Re: Johnson 115 high voltage

First If I understand you correct...DO NOT disconnect the battery to test while the engine is running! You will be buying a new powerpack if you do! You might get lucky once or twice...Dont do that! <br /><br />Your problem looks like a classic case of the rectifier gone bad. It is connected electrically to the tach and does show up as the tach going crazy. Replace the regulator/rectifier and see what happens for this problem.

 

[Yepblaze]

Re: Johnson 115 high voltage

Do not disconnect the battery when engine is running as it can cause engine electronic components to fail due to the high voltages. <br /><br />Hook the battery back up and hope it's ok. <br /><br />Disconnecting the battery while running could lead to component failures unrelated to your initial problem.<br /><br />Many times the outboard will charge at a rate higher than would be prefferred but without problems.

 

[Trent]

Re: Johnson 115 high voltage