Excessive voltage when running 1992 Johnson 115SPL

[wgkelly]

Batteries are good; I pulled them and brought them in to check and they're fine. When idling I get a good reading on my voltmeter at ~13.5, but when I am running it slowly starts climbing as high as 16+. This happens with either battery and verified by my multitester. It sounds like the voltage regulator or rectifier is going bad, but I don't know how to test this or even where they are on this engine. I admit I don't even know enough to be dangerous, so any help that keeps me from being dangerous would be greatly appreciated. Thank you.

 

[sam am I]

Sounds like you have covered your bases and you do in fact have a bad rec/reg, this isn't that uncommon, but unfortunately CDI (hiss, boo....Over priced Chinese rebrands) seems to have the after-market on Johnson battery charge stuff............Appears that you have a combo and the OEM part is rectifier/regulator all in one here at iboats. To replace, just follow the yellow brick wires out from under the flywheel. Do double check I have the right part though before you drop $250

 

[racerone]

Factory unit appears to be less than $150.------Need a new gasket too.----If you can pull the flywheel yourself you can save $100 shop fees.

 

[wgkelly]

Factory unit appears to be less than $150.------Need a new gasket too.----If you can pull the flywheel yourself you can save $100 shop fees.

Thank you-- I'll probably let the pros take care of it. I appreciate the help and advice!

 

[wgkelly]

Factory unit appears to be less than $150.------Need a new gasket too.----If you can pull the flywheel yourself you can save $100 shop fees.

Sounds like you have covered your bases and you do in fact have a bad rec/reg, this isn't that uncommon, but unfortunately CDI (hiss, boo....Over priced Chinese rebrands) seems to have the after-market on Johnson battery charge stuff............Appears that you have a combo and the OEM part is rectifier/regulator all in one here at iboats. To replace, just follow the yellow brick wires out from under the flywheel. Do double check I have the right part though before you drop $250

I meant to thank you both-- it's great having this resource to help out us mechanical cripples! Thanks and have a great holiday!