Some gauges not working

[Stevie.UK]

Hi guys

First question on the forum.
I've got a 1993 2300SCR the speedo, trim gauge don't seem to work but all the others do.
In simple terms any ideas how to test em and check if it's the sender or gauge?

[mmwjr]

For the trim gauge check the trim sender on the side of the gimbal ring, these are know for broken wires. If they are broken replace the senders when the bellows are done next time.

Regarding the speedo chech that the tube is connected to the drive fitting. Front between where the Rams attach, kind of back in a cavity.

[Stevie.UK]

Thanks Mike,
Fixed the trim tab gauge as it was just a broken wire when I checked.
I will have a go at the speedo then the out drive is serviced, but thanks for the info.
Any idea on the temp gauge? As that has now stopped lol

[mmwjr]

Try grounding the sense wire at the sender to see if the gauge moves, if so replace the sender.