2000 90tlry

[dwc001]

I would like to add a water pressure gauge for a 2000 90TLRY. I was told we had to drill and tap the water jacket.Is this true or can someone tell me where the plug is?

[boats.net]

No there is a water pressure port on engine to install Yamaha water pressure tubing, here is diagram.
50-90 WaterPressure Port.JPG

[dwc001]

Thanks

Thanks, I found it this afternoon.The plug was very hard to get out which means when I got it out the threads were gouged.What is it that you use for that? Not a helicoil. I heard something else mentioned here. Also adding trim gauge, what is the part number for the harness that goes to the console?

Thanks for the info.

[mitch]

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but seems like they are dear

I have not used them as they are not available in Australia but just the engineering is better than heli coils