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NMEA trim data: Yamaha to Garmin

Old 05-31-2021, 05:12 PM
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Default NMEA trim data: Yamaha to Garmin

I just added a Garmin EchoMap UHD 73cv MFD to my G3 Suncatcher tritoon. The factory gauges are a combination tach/trim gauge and a combination speedo/fuel gauge. The trim gauge moves as expected when the engine is trimmed in and out. Before connecting the pink wires under the cowling that allow digital trim data to be sent to the MFD, the trim indicator on the MFD was all the way at the top. Initially after connecting the pink wires, the analog gauge pegged at the top and the trim indicator on the MFD would move (but not proportionally to the actual trim position) but it only move a couple times then pegged out. It was on a lift with the engine out of the water and I wondered if that made a difference so I waited until I took the boat out to look at it again. With the engine running and the boat underway, the analog trim gauge was working again and the trim on the MFD was pegged and wouldn't move. I've read that I might need to disconnect the wire to the analog trim gauge before the MFD trim indicator will work. True? If so, is that a matter of tracing the wires from the trim sensor, or is there standard color(s) for a Yamaha trim sensor? The wiring going into the back of the analog gauge connects through a multi-wire connector so it would be nice to have some idea which wires to cut.
Old 05-31-2021, 06:14 PM
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JJR
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You can't have analog and digital trim data transmitting at the same time from a single sender. It is one or the other.
Old 05-31-2021, 08:28 PM
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Originally Posted by bighorse View Post
is there standard color(s) for a Yamaha trim sensor? The wiring going into the back of the analog gauge connects through a multi-wire connector so it would be nice to have some idea which wires to cut.
Yes, the wire for the analog trim signal - its just one - is also pink,
Old 06-11-2021, 05:59 AM
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Thank you for the input. I’ll be working on this later today.

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