A
Al Johns
Guest
" On my mercruiser 3.7 190hp f
" On my mercruiser 3.7 190hp fresh water cooled at idle my temperature goes up to 180-185 and running at 3500rpm goes up to 200+ range in a very short distance. I'm using a 160 thermostat which, through testing, begins opening at 160. I replaced the waterpump and water hose in the outdrive and have good water flow. The temp of the coolant in the riser is 143 at idle so the heat exchanger is cooling the coolant by 40 degrees at idle. The exhaust and riser doesn't appear to have an excessive amount of corrosion. I guess my question is are these temp too high and if so what could be the problem? How would you test the temp sensor and or test for the correct temp at the thermostat. "
" On my mercruiser 3.7 190hp fresh water cooled at idle my temperature goes up to 180-185 and running at 3500rpm goes up to 200+ range in a very short distance. I'm using a 160 thermostat which, through testing, begins opening at 160. I replaced the waterpump and water hose in the outdrive and have good water flow. The temp of the coolant in the riser is 143 at idle so the heat exchanger is cooling the coolant by 40 degrees at idle. The exhaust and riser doesn't appear to have an excessive amount of corrosion. I guess my question is are these temp too high and if so what could be the problem? How would you test the temp sensor and or test for the correct temp at the thermostat. "