I just recently purchased a "new to me" 2004 pontoon boat. It has a 2005 90HP Mercury outboard, model number 1F90412DD, serial number 1B008689. Since I am new to outboards (previously have had I/O) and am attempting to get everything functioning as it should, I have a couple newbie questions. Where I get stuck is the speedometer. I believe, from my research, that the pickup tube for speed is in the lower unit on the motor. I currently have a small piece of rubber tubing sticking out of the front of the motor approximately 3" but it's not connected to anything from there. It comes out of the front just under the lower steering connection. Is this the tube for the speedometer?
I also found what appears to be an insulating sleeve that is tied together with the wiring harness that has nothing in it. I'm wondering if that might be for the trim gauge since the sender is .not installed.(Bolts are there, but the sender appears to have been broken off)
Is there a diagram anywhere that shows the connections on the motor and gauge ends? I had one for my I/O but can only find ignition diagrams for the outboard.
Any assistance would be greatly appreciated! I can provide pictures of the two tubes mentioned if needed.
Thanks!
I also found what appears to be an insulating sleeve that is tied together with the wiring harness that has nothing in it. I'm wondering if that might be for the trim gauge since the sender is .not installed.(Bolts are there, but the sender appears to have been broken off)
Is there a diagram anywhere that shows the connections on the motor and gauge ends? I had one for my I/O but can only find ignition diagrams for the outboard.
Any assistance would be greatly appreciated! I can provide pictures of the two tubes mentioned if needed.
Thanks!