Merc engine swap electrics

[DJS]

Hi all

I am swapping a carburetted mercury 90 hp 4 Stroke (year 2000 model) and a 90 hp 2 stroke (year 2002) from one boat to another. One is in an older speed boat with a side mounted control box which includes the ignition switch/fast idle lever etc.

The other boat is a little more modern with the newer control box with the ignition switch is on the dash.

Can anyone advise if the complete wiring harness has to be transferred with each engine.

Cheers

[Under the Thumb]

I cant say for sure, but we have the manuals for both those engines as pdf's here, you can compare the wiring diagrams to check

Boating Resources


it will be the in the complete Yamaha. Mercury. Mariner manual 1995 to 2004 book, bottom of the page.

Will

[9D280]

FWIW I have my Merc running to Yam 703 electrics mounted in my console.

The big hassle I had on engine swap was the multi plug connection in the engine.

If they are both Mercs you might be lucky.....but I don't have a manual to hand...

[Nos4r2]

If the main loom plug on the motor is the same, they'll swap almost straight over depending on gauges.

[DJS]

Had a good look at the connector block on each engine and both are 8 pin with the same configuration.

Thanks for the help folks and the signpost to the wiring manuals etc, its a great resource.

D