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
Recent Wiring Diagrams
- Johnson 1977 Outboard Wiring Diagram 9.9Hp and 15HP (Electric Start) Added: May 2022 | Category: Diagrams | [...]
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- Yamaha Outboard Wiring Diagram 4HP & 5HP (1980) Added: March 2022 | Category: Diagrams | Manufacturer: Yamaha [...]
- Tohatsu 25HP C2 30HP A3 Wiring Diagram (1996) Added: Dec 2022 | Category: Diagrams | Manufacturer: Tohatsu [...]
Outboard Wiring Diagrams by Manufacturer (Quicklinks)
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Do you have a wiring diagram for an 1986 Mariner 40HP?
Thanks
Hi Jim, thanks for the comment.
I think the owner handbook for the Mariner 40HP has one but you can also check the Mariner Model Guide to see if the service manual is shared across models as they often were.
Check here: https://outboardmanuals.net/outboard-manufacturers/mariner-outboard-motor-model-identification/
Let me know if you can’t find what you’re after and I’ll do some digging through the archive.
Thanks
John.
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
Hi Scooter, yeah I heard it either got pulled down or went behind some kind of restricted access section.
There is a bit of thread on Reddit here: https://www.reddit.com/r/cars/comments/f6bcx9/bbb_industries_is_no_longer_offering_wiring/
Not sure if it will come back again but I know lots of people used it.
Let me know what you need.
Thanks!
John
I need the wiring diagram for a 150 Mariner outboard for the trim motor and how it is hooked to solenoid
Hi Adam, thanks for the comment. What year is your motor?
Let me know and I’ll take a look.
Thanks
John
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