Larry, I am not sure where to connect the gauge to your outboard, but it is installed by connecting a plastic tube to a brass fitting that is screwed into a water jacket on the power head. The other end of the tube goes to the back of the gauge. You would be best off to check with a local technician for connection location(s). It is my personal opinion that you should have a pressure gauge installed regardles of the use of the boat, or trim habits. Outboards just cost too much to be smoking one because some idiot threw a ziplock bag in the lake that ended up around the intake of your motor. I have on more than one occasion sucked silt into my motor when running in shallow water. The pressure gauge gives almost immediate notification of a flow problem (if you pay attention to it of course). A pressure gauge coupled with a temp gauge (or onboard warning system) can save lots of money down the road. A temp gauge or an outboard equipped with a warning system can help you determine if a steam pocket is causing a false pressure reading. If you do suck something into the motor that plugs the water jacket, steam can form and cause an inaccurate reading on the pressure gauge. If my pressure gauge reads ok, and the engine alarm is sounding (or temp gauge shows hot!), I am going to go with the alarm and shut the motor down. This may be overkill, but I'd rather spend a few bucks on instrumentation than a few grand on a rebuild....
