1985 Chris Craft Scorpion 186. 230hp 305. I bought recently and was told thermostat was removed and restrictor installed . no cooling issues. runs between 140 - 160 depends on load. My question is if restrictor is working is thermostat needed?
So I put new 160 thermostat in . Running on muffs in driveway it will stay at 150 degrees idle. If I put rpm up to about 1500 for a bit the temp keeps creeping higher . I no that's normal but figured would level off , it went little past 180 before I let idle back to 150. Question is if on muffs is there not enough flow of water at higher rpm ? Whats difference in temp from hose to floating boat? If weather good I will try tomorrow.
