I am looking at purchasing a 50HP mariner for one of my future projects Of course I want to run it beofre I purchase it. When I put on the adapter to get water thru the engine nothign comes out of the water hole. My yamaha 115HP motor goes like a storm at any time, Does the mercuries have tohave the thermostat open up before I get any water out? Or I am looking at having to replace the water pump already? Also how hard is to pull the lower unit and replace the water pump if needed?
Thanks
Dave
Thanks
Dave