Author Topic: 87 cv23 trim sender?  (Read 1643 times)

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Offline 87glasfun

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87 cv23 trim sender?
« on: September 06, 2023, 05:57:06 PM »
Hello,

I recently purchased a 87 cv23 with a mercruiser lower unit with a trim gauge not working. Replaced the trim sender rotor as the old one was shot. I adjusted the rotor per manual and now the gauge is either full up or full down when trimming. Any ideas?  Thanks in advance for any input.
« Last Edit: September 06, 2023, 06:18:31 PM by 87glasfun »

Offline Plugcheck

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Re: 87 cv23 trim sender?
« Reply #1 on: September 06, 2023, 08:58:10 PM »
Did you buy the kit with two sensors?   One is a contact to limit the tilt, the other is like a volume control to provide signal to the trim gauge.   It's possible you installed the wrong one.    Open the cap of the sensor, one has a slider, the other has a switch that opens.   
Michael
1979 CVZ-18 388 CI Vortec Mouse
1980 CVX-16SS 140 Mercruiser
1979 CVX-16 Johnson 175
2002 Bennington 2275CC 90 Mercury
1985 Intimidator project
1989 Lowe 200 Redneck fishin Toon
2001 Godfrey Sweetwater pontoon 115 Rude

Offline 87glasfun

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Re: 87 cv23 trim sender?
« Reply #2 on: September 07, 2023, 06:43:55 AM »
The part I installed was identical to what I  removed.

Offline 87glasfun

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Re: 87 cv23 trim sender?
« Reply #3 on: September 07, 2023, 06:47:14 AM »
The part I replaced was identical to what I removed. Also both the old and new rotor are very warm when the key is left on for any period of time, does that seem right?

Offline 87glasfun

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Re: 87 cv23 trim sender?
« Reply #4 on: September 07, 2023, 06:51:59 AM »
I did not replace the sender, just the rotor as everything else looked to be in good shape with no corrosion.

Offline Plugcheck

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Re: 87 cv23 trim sender?
« Reply #5 on: September 07, 2023, 12:35:50 PM »
It should not be getting warm, at least I've never seen one do that before.    I think a close inspection of the wiring is in order, maybe a short or possibly chewed wiring?   
Michael
1979 CVZ-18 388 CI Vortec Mouse
1980 CVX-16SS 140 Mercruiser
1979 CVX-16 Johnson 175
2002 Bennington 2275CC 90 Mercury
1985 Intimidator project
1989 Lowe 200 Redneck fishin Toon
2001 Godfrey Sweetwater pontoon 115 Rude

Offline 87glasfun

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Re: 87 cv23 trim sender?
« Reply #6 on: September 07, 2023, 02:27:13 PM »
I didn't think it should be getting hot. Once the wires are through the hull the trim sender wires are hooked up as follows: Male plug goes to hot terminal up by the fuel filter and the female end goes to ground. Does that sound right? The limit sender wires: one male end goes to purple wire by the trim pump and the other male goes to the blue/white wire. Is the correct?  Thanks again for taking the time to answer.

Offline Plugcheck

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Re: 87 cv23 trim sender?
« Reply #7 on: September 08, 2023, 08:09:22 AM »
There are many electrical schematics online or possibly your owners manual might have some info?    One side to ground is correct, but the other side of the trim sensor should go to the trim gauge itself.     The system works by the trim sensor varying the amount of current going to ground through the gauge.   One mercruiser schematic I saw has this as the brown/white wire.   
Michael
1979 CVZ-18 388 CI Vortec Mouse
1980 CVX-16SS 140 Mercruiser
1979 CVX-16 Johnson 175
2002 Bennington 2275CC 90 Mercury
1985 Intimidator project
1989 Lowe 200 Redneck fishin Toon
2001 Godfrey Sweetwater pontoon 115 Rude