Re: Doral TRX Bowrider
What's the length of the boat? Under or over 20'?
Edit.
Looking at some Kijiji ads, it appears to be a 16/17 ft bow rider? If so, there should be a capacity plate on her somewhere. If it has been removed, this could be a problem for you if you are stopped by the OPP

There is an old formula that will give you a ROUGH idea of maximum capacity.
Multiply the length (in feet) by the width, and divide that figure by 15. That gives you max # of people. Round that number down and multiply by 150 - that gives you max weight ( which includes weight of gas and all "stuff" on board).
So for example, if the TRX is 16.5' long and 7.0' wide - that gives 115/15 = 7 people or 1050 lbs. NOTE that you will reach 1000lbs typically with 3 or 4 adults plus gas & gear.
For troubleshooting those gauges, this link may help
http://www.boatinghowto.com/content/troubleshooting-those-pesky-marine-gauges-124/