Wiring Diagrams for Outboard Motors

Updated: March 2022 | Category: Diagrams | Type: Free Downloads

New for 2022! - We are building up a repository of Free Wiring Diagrams for outboard motor engines for manufacturers such as Johnson, Evinrude, Mariner, Mercury, Honda, Suzuki, Tohahsu and more. Troubleshoot your outboard starting or ignition system problems with this essential resource.

Free Outboard Wiring Diagrams

We add new wiring diagrams all the time so check back regularly if you can't find one for your outboard. Need help interpreting an outboard wiring diagram? - drop me an email

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11 Comments

  1. Hi John, thanks for loading these up.

    Did you start this because BBB Industries no longer provide wiring diagrams? I used their resources section of the site for years but now can’t seem to access it anymore.

    Do you know what happened to them?

    Scooter

  2. Hi, I’m looking for a wiring diagram for a smokercraft pro tiller 50Hp. I’m trying to troubleshoot boat side electronics issues not the motor. Not original boat owner and something fishy is going on. Fuel gage reads full with power on, always. Nav switch has Both red and green switch lites illuminated, and blows the 20A main fuse.

    • Hi John, thanks for the comment. Not sure I can help with any manual content but if you have multiple electrical quirks as the same time that usually means a fundamental issue such as a short in the circuit. You might have to take components out one at a time to troubleshoot to isolate the root cause.

      Sorry can’t be more helpful.
      John

  3. I am looking for a wiring diagram for a 2003 Yamaha 115 two stroke outboard motor. Could you please let me know if you have this wiring diagram.

    • Hi Tommy, thanks for the commment.

      I’ve had a look through the manuals not yet on the site and unfortunately I don’t have one to cover the Yamaha 115hp. Will keep and eye out for it on my travels though.

      John.

  4. Hi I am looking for wiring information for a 30hp Zongshen outboard motor.
    I got it with the boat and it came with every wire disconnected.
    Or if you an direct me to a diagram that I can base things from.
    Many thanks

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