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Boat Trim Sending Unit compatibility? #4809277
07/09/18 01:12 PM
07/09/18 01:12 PM
Joined: Jun 2009
Posts: 1,846
Wisconsin
wallyuwl Offline OP
wallyuwl  Offline OP

Joined: Jun 2009
Posts: 1,846
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,.

Re: Boat Trim Sending Unit compatibility? [Re: wallyuwl] #4809379
07/09/18 03:13 PM
07/09/18 03:13 PM
Joined: May 2018
Posts: 174
California
Dave1027 Offline
Dave1027  Offline

Joined: May 2018
Posts: 174
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!

Re: Boat Trim Sending Unit compatibility? [Re: wallyuwl] #4809622
07/09/18 07:30 PM
07/09/18 07:30 PM
Joined: Mar 2004
Posts: 21,575
Upstate NY
Donald Offline
Donald  Offline

Joined: Mar 2004
Posts: 21,575
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)
Re: Boat Trim Sending Unit compatibility? [Re: wallyuwl] #4811883
07/11/18 10:33 PM
07/11/18 10:33 PM
Joined: Jun 2009
Posts: 1,846
Wisconsin
wallyuwl Offline OP
wallyuwl  Offline OP

Joined: Jun 2009
Posts: 1,846
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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