[Toyorider]

i have a 65hp mercury i want to install on my boat but not sure how to wire it up. From looking around online it looks likes its a mercury 650 (found a picture below). its a black mercury with blue letters on the case. Anyways coming from the control box there is a square square harness that connects on the front left side of the motor (looking forward at the prop). What other wires do i need to connect and where. i know i need power and ground and probably a ignition. thanks

[Toyorider]

anybody? how is your mercury 65hp wired up?

[ThumbPkr]

You need to do a little legwork here before you can expect any assistance I think.
Find out what engine you have from the serial number and from there it is a small step to get a wiring diagram for it.Merc made quite a few engines with blue trim on them.The serial number should be on a plate between the transom clamps.Ron G

[elark7]

Wiring is selfcontained in the harness and control box, including battery cables. You can get a control box and harness with cables on ebay or other such sight for anywhere from $50 up to $180. Make sure you know the length you need, measuring on your boat and adding 2 feet worked for me. You can go to www.maxrules.com/, it has all the info you will need to find out what year your motor is and has the wiring diagram in color. You can also find most of the parts you need for repairs here on iboats. There is also oldmercruiser.com that you can get info off of and many more sights that sell parts, google mercury parts for sale, most are very expensive overall compared to this sight or ebay. You should also search your motor on this sight forum as you can read old posts about every concievable problem you might have and not repost a question that has already been asked/answered thus putting you two steps ahead. I have saved a lot of this info in word documents for future reference. No offense to ThumbPkr but I always thought this sight was here to cut down on the amount of leg work needed for newbies. Help them out with solid advice and get them to help support this sight through purchases. I went through a lot of useless web sights before falling on this sight by accident. I wish I had found it and the great wealth of info it contains sooner then I did.