posted 02-28-2005 07:49 PM ET (US)
I replaced a defective gauge that came with my (new to me) 1987 Montauk.The parts counter staff explained the wiring and drew me a diagram noting colors.
To mount the gauge in an area that is fiberglass, check behind the intended location to ensure nothing is in your way.
Purchase the correct diameter hole saw (for your drill)with the drill bit in the center. (check the gauge instructions for the correct diameter of the hole.) You can find this at any hardware store.
Mark center of the hole with marker.
Mask the area of the edge with masking tape (go 1/2 inch inside and out side of hole)
Go slow and make sure you drill straight (straight according to console).
Once 1/2 way through, drill the rest from the inside of the console OUT. This allows a clean hole on both sides.
Wire and test. If not working, check wiring.