What temp should the engine run at on a 1998 Mercruser with a Chevy 5.0? What is the thermostat rating?
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Impossible question to answer without more info!
Which 5.0L fuel delivery system?
FI with temp sensing.... or carbureted?
Salt water.... or River/Lake water use?
Open or Closed Cooling system?
You are correct by asking, and correct by running a thermostat.
DO NOT run without a Thermostat.... no matter who may suggest otherwise..... and/or what you may read!
No boat nor engine builder will suggest running our engines without the correct temperature thermostat installed.
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Rick E. (aka RicardoMarine) Gresham, Oregon
2850 Bounty Sedan Flybridge model
Twin 280 HP 5.7's w/ Closed Cooling
Volvo Penta DuoProp Drives
Kohler 4 CZ Gen Set
Please, no PMs. Ask your questions on forum. -
1998 5.0 Chevy, carb, open cooling in fresh water
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My 2000 runs right at 172 degrees
Boatless at this time
A veteran is someone who, at one point in their life, wrote a blank check made payable to "The United States of America," for an amount of "up to and including their life."Comment
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I've found online that the thermostat is a 160. My gauge says 175 so I might be running hot. I will first install a new tstat and if that doesn't work, what next? What all can I do without pulling the boat out of the water? Can I flush / clean out the cooling system with the boat in the water.
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You should be running ~175 with a 160 thermostat. You don't need to do a thing.seasam wrote:
I've found online that the thermostat is a 160. My gauge says 175 so I might be running hot. I will first install a new tstat and if that doesn't work, what next? What all can I do without pulling the boat out of the water? Can I flush / clean out the cooling system with the boat in the water.
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