Ok I got this 1989 magnum ll 150 from a coworker who is fed up with it ?nd asked me to just get it running and sell it for him. He had overheat alarms a week ago and put a new pump assembly in. When he tried it on the ear muffs it didnt pump right away and he just gave up. He also had a wiring mess and deadbatteries under the hood so I just pulled the 2 batteries along with 2 Perko switches out and wired it to one battery with no switch so I don't have to worry about wiring issues until the motor is running right. I got it running and have a stream coming out the telltale but the right side got noticeably hotterafter a few minutes at idle on my muffs. I pulled the thermostat apart and put the empty shell back in and the right side got cooler but after about 6 or 8 minutes of idle it alarmed. I ordered new stats but they wont get here until Wednesday. I'm thinking I am not getting enough water from the hose right now so I would like to go put the boat in the water and see if it still gets hot. My question is will it hurt to run it a half hour or so with no right side thermostat? The motor is on a winner bassboat and really is a nice powerplant when its working right. Also can anyone think of something else to check? This is my first adventure with a big v6 I'm usually messing with omc twins or maybe a triple. Also I ordered a thermostats kit with 2 stats and 2 gaskets is that all I need to replace the thermostats? And finally please excuse my typing and lack of punctuation I am tapping this out on my wife's kindle since my Pc decide to go in the dumper today.