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Old 06-12-2018, 11:02 PM   #1
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Default Trim Gauge adjustment

I have a 05 Maxum 1800 MX
3.0 engine

Mercruiser Alpha One

My trim gauge doesn't show it all the way up. but I can see the drive is all the way up.

is there a way to adjust the gauge?
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Old 06-13-2018, 12:25 AM   #2
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The trim sendor is on the side of the gimbal ring; outside transom assembly. It’s a round puck that has two screws that you loosen to rotate to adjust.

Does the gauge move at all? The wires are know to break and the gauge will not move at all.
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Old 06-14-2018, 02:29 AM   #3
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thank you!

I have one on each side.. one I can read trim.. are they both for that?
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Old 06-14-2018, 02:29 AM   #4
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Old 06-14-2018, 03:05 AM   #5
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One is the trim limit switch that prevent the drive from being trim up to high when operating the boat. The trailer button is then used to bypass the limit switch to raise the drive for trailering.

The other is the trim position sendor.

Don’t recall which side is which.
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Old 06-14-2018, 03:20 AM   #6
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The port side is the limit switch for adjusting the trim on my boat and says “trim” on it....would think it would be the same but....


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Old 06-14-2018, 03:22 AM   #7
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Quote:
Originally Posted by Overboard View Post
The port side is the limit switch for adjusting the trim on my boat and says “trim” on it....would think it would be the same but....


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I usually have to reply to my own reply.......

The starboard one is the gauge sender and the port “trim” is for the limit switch


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Old 06-14-2018, 11:18 AM   #8
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Quote:
Originally Posted by Overboard View Post
I usually have to reply to my own reply.......

The starboard one is the gauge sender and the port “trim” is for the limit switch


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Thanks, this is the standard so the OPs will be the same.
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Old 06-14-2018, 11:05 PM   #9
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thanks guys..

I found the one marked trim sender,

its adjusted all the way.

the reading is just below the mark for all the way up

does that mean I need a new one? or is it just not that accurate?
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Old 06-14-2018, 11:29 PM   #10
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Quote:
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thanks guys..



I found the one marked trim sender,



its adjusted all the way.



the reading is just below the mark for all the way up



does that mean I need a new one? or is it just not that accurate?


The one marked trim is just the limit switch, if you are looking to adjust the gauge you will need to adjust the one on the other side of the gimbal ring if either of them is beyond adjustment you can remove it and adjust the centre of the switch.


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