Outboard Switch Over

[2knots]

I rewired a 1975 115 Merc a couple of years ago- $235 and 2 hrs of my time. If I can do it anyone can. I have a brother who is a guide on Lake Eire he says the mechanics there say you will find parts for your rude/john until you die. I wish I could help on your question but there are forums out there that could answer your question.

I think I was just done with that motor, it had a habit of not working when I needed it to and when Lee's said the motor needed new wires and the electronic ignition should be replaced and etc. etc... (which probably wasn't true because the engine still ran) anyway I was just done with it, so I sold it cheap and cut my losses...

I did find a youtube video on rewiring the older (Pre 96) Johnson motors to the newer controls... I think it doesn't look too bad, but I need to see what I'm up against when I get the motor... not sure how many wires are there to work with...  Here's another question, My Humminbird fish finder has a screen that has all the boat gages and controls on it.  What do you have to do, to get your motor to talk to your fish finder?  Is it difficult to hook the two units together while I'm already having to rewire the harness?  I'm thinking it is possible, but I need to know what you need to have to connect to the fish finder... is this a time to find a good boat forum too?  Thanks Jeff

It may also be possible to hook it up with the NEMA 0813 which is all low voltage cable, the 2 extra wires that come out of your fish finder power cord that nobody typically uses is the 0813 cables. You would need to check in your fish finder manual to see what system they are using for the “gauges”. 0813 uses limited codes in sentences and some time won’t read what is coming from the motor or other devices on the boat and can be manufacture specific hence the move to NEMA 2000. Motor age could be an issue also to tie into the FF as it may be strictly analog out put to a typical gauge. Let me know if you need a hand putting any of it together Jeff