Re: I need help finding the part number for my trim sending unit please.
Thank you to everyone for your replies. Here is how it went. Part number 3849411 does work on my 2004 Volvo Penta drive unit SX-M. The one that came off of the boat had 2 wires, one black and one white. Part number 3849411 has three wires, white, solid black, and black with a stripe. The directions said to use the white and solid black wires. That made sense so I went for it. The comment about using a piece of string is a great idea, I have used that trick working on aircraft, however I would suggest to all using it when you remove the clip as well as installing it because I dropped it when I removed it. I searched for over an hour and never found it, luckily I had a spare. Tying a knot in the wires worked great. I installed the new sender and no joy, it didn't work. The directions had a check to see if the sender was working by using an ohm meter, it said to look for 600 +/- 25 ohms between the wires, the new one was at 750. I was about to give up and get angry. I tried switching some of the wires around and turns out you have to use both black wires, which works. I used a piece of thread when I installed the grommet clip this time. Getting to everything inside and outside the boat was a bit tricky, I ended up removing the carpeted board in front of the trim motor, it was only held on with 2 screws, which made it a lot easier to get around the engine. I hope this helps someone down the road and thank you again to everyone who helped me.
