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#4809277 - 07/09/18 02:12 PM Boat Trim Sending Unit compatibility?
wallyuwl Offline


Registered: 06/02/09
Posts: 1780
Loc: Wisconsin
I have a new-to-me 1985 boat, with a 1985 90HP Johnson V4 outboard. It needs a new trim sending unit, part number 583358. It was discontinued a couple years ago and I have only found one place that has it, but it is $180 shipped (about double the price it was just a couple years ago before being discontinued).

I've seen there is a part number 583359, and have read most of these are interchangeable with the only major differences between all of these sender units being some have a ground wire (that isn't needed on all). Anyone know about these motors and know for sure?

Thanks,.

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#4809379 - 07/09/18 04:13 PM Re: Boat Trim Sending Unit compatibility? [Re: wallyuwl]
Dave1027 Online   content


Registered: 05/02/18
Posts: 62
Loc: California
Are you sure the sending unit is bad? Usually it's a connection problem. For that kind of money I'd just look back at the motor instead!

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#4809622 - 07/09/18 08:30 PM Re: Boat Trim Sending Unit compatibility? [Re: wallyuwl]
Donald Online   content


Registered: 03/21/04
Posts: 20549
Loc: Upstate NY
Take it apart. I will bet you can clean it up and get it working.
_________________________
2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)


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#4811883 - 07/11/18 11:33 PM Re: Boat Trim Sending Unit compatibility? [Re: wallyuwl]
wallyuwl Offline


Registered: 06/02/09
Posts: 1780
Loc: Wisconsin
I found a new one at a large dealer about 100 miles away. Got lucky, as it isnt even on ebay. I replaced it today and now the gauge works. It only goes 3/4 up on the gauge, though, so there must be some way to calibrate it.

I also replaced the rectifier/regulator and that fixed the charging system and tachometer not working.

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