Oday 25' (outbd motor) about 1978-80 Wiring Diagram

May 27, 2026
1
Oday 25 outbd motor swing keel Cheney Lake
Recently acquired our 25 Oday. The wiring is an absolute mess and would love to get a overall wiring diagram. I've read of several sailors with the same problem and would be very grateful to receive a complete Wiring Diagram.....REALLY GRATEFUL!
 

jssailem

SBO Weather and Forecasting Forum Jim & John
Oct 22, 2014
24,455
CAL 35 Cruiser #21 moored EVERETT WA
Welcome to SBO. New members get one freebie. Here is a link to an original diagram posted as available by searching the forum.

Your boat was previously owned, and through the years, you may find that the previous owners did not follow the diagram when remodeling the boat to fit their desires.

Have fun.
 
Jan 1, 2006
7,935
Slickcraft 26 Sailfish
I'm glad John could provide a link to the diagram. But there's no reason to think that an electrical system designed 46 - 48 years ago is relevant today.
 
  • Like
Likes: jssailem

Ward H

.
Nov 7, 2011
3,827
Catalina 30 Mk II Cedar Creek, Bayville NJ
I owned an 83 O'day 25 for about 5 years and did a lot of electrical work. One thing I quickly learned was the wiring diagrams I found were really just a suggestion for the installers.

Forget about trying to pull wires that go up to the headliner and forward. O'day apparently ran the wires before gluing in the head liner. Some other runs were slightly easier to replace but not by much.

I basically ran most wires from scratch. I know on one run, on the port side up to the head and v-berth, I had to go from the panel, back along the port side into the quarter berth, up to the access for the winch bolts across to the port side, then between the headliner edge forward.
The area back by the winch access was the only part of the headliner where there was enough space to allow me to run the wires over the quarter berth above the headliner.

Apart from that, from the panel back is relatively easy access for running wires back for the stern light, outboard and to the battery.

I found the O25 to be a great boat and know you'll enjoy yours.