1992 150hp XR6 gauge setup

1992 Merc XR6 150hp

I've added all new Faria engine gauges in my boat after a successful splash back in May. It takes me a (very) long time to get anything done, but I've been poking along.

The gauges are all installed and wired up to power and ground.



This morning I went out to connect and test the tilt/trim sender, temp sender and water pressure loss warning light. I plan to add a beeper/buzzer for the pressure loss indicator light too.

1. When the engine was installed last year, the brown/white wire for the tilt sender was cut to allow moving the engine from the donor boat to this one. Today I tightly twisted the 2 brown/white wire ends together and tested. No joy. When powered off, the gauge is about full up. When I switched power on, it drops to full down. However, when I raised/lowered the engine, the gauge only twitched, but didn't move up or down.
I can't find where the sender is located.



2. I connected the temp gauge to the tan wire and when it powered up, the gauge went to full hot. I don't know if that's normal or not, but it seems backwards to me. I haven't tried running the engine yet though.

3. I connected the pressure loss tan/blue wire to the warning light and it came on dimly. But! I think it wasn't connected to the sensor. I tried jumping from the sensor to the gauge and got nothing. Disregard the spark plug wire. I just moved it out of the way for the pic. It doesn't touch anything.


So, that's where I am now. I have a Service Manual and will be checking that, but so far no joy. Any ideas?

So, I Googled a couple of the issues and the AI gave me step by step instructions on what to do.

Ain't technology great?

Your trim gauge sender wiring must be wired up thru the transom clamp. The way it is now will likely cause it to be physically damaged by the water.

I never saw a water pressure gauge sender like that. It sure looks like a water temp gauge.

A lot of Merc V6 motors had an overheat switch on one head and a water temp sensor on the other. The temp gauge sensor usually has a tan wire.

A mechanical water pressure gauge is pretty easy to install, and real foolproof. You might consider replacing your temp gauge with a mechanical pressure gauge.

look on tha port side of clamp bracket.. you should see tha end of tha rod that tha center tilt cylinder attaches too.. it will have a slot in tha end of it.. there should be two holes for tha screws that hold tha sensor on.. your sensor will look like #24 in tha diagram attached.. it will have a brown (or maybe a brown/white, don't remember for sure) and a black (black ground can go under one of tha mounting screws).... good luck findin' a sensor.. they are gettin' really scarce............


below is tha complete parts page for your motor..