Irreplaceable trim sending unit

[Dan Hargrave]

I have an 1989 Evinrude 150 XP Model # E150STLCEM (on a VIP Fish and Ski boat) that has a bad trim sensing unit (583358). The gauge tests just fine using some resistors (50 ohms = dead center). But sending unit reads up around 50K ohms. The problem is I can't find this part anywhere. Including eBay. My options seem to be:

1. Go without a trim gauge.

2. Try to fix the existing sending unit. It will not be easy but I've done this kind of thing before with some success.

3. Replace both the sending unit and the gauge. Not sure how feasible this is.

4. Other ideas?

Thanks for your input.

 

[kevinj]

Will this unit not work? https://www.marineengine.com/newparts/part_details.php?pnum=OMC0433462

Also, check to make sure you're grounding straps for the sensor are clean and making good contact. Maybe you have a corroded connection that is causing excess resistance and is sending a bad signal.

 

[Dan Hargrave]

Thanks Kevin!

That unit does not have the same external configuration. This unit on ebay does in fact look exactly the same externally. But I don't know what the resistance of the pot is.

Evinrude Johnson 60 HP 2 Stroke Trim Sending Unit Assembly 0583361 583361 | eBay

This is a working part that was removed from a 1987 Johnson Evinrude 60HP 2 Stroke [E60TLCUC].

www.ebay.com

I may try that one. Roll the dice.

My understanding is that the gauge is just measuring resistance which was confirmed by my placing resistors across the wires. So ground would not play a roll. Good suggestion though.