SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: Hddaddy on June 09, 2012, 01:37:04 PM
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I have a Indmar 454 w/ a Legend pump in my boat. Seems as if the engine temp never goes above 120. Should I add a thermostat? There is no valve coming off of the water inlet from the jet. My set-up puts the water through my exhuast manifolds then into the motor and back out through the exhaust risers.
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Put a gate valve on your inlet line off the pump. Then adjust it to control water flow and temp.
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I have no t stat and my boat never hits 100 and I have been fine for the past 4 years.......the cooler the better 😃
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No not the cooler the better. Our engines are happy around 160-180.
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Always run mine wide open.
Was told along time ago not to control temp with the gate valve.
Even in our Rogers and it turns 6700 rpm's, never an issue.
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👍👍👍
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I would adjust the flow/temp on olds or chevy but not ford. A gate vale is a good idea just in case you blow a hose.
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I have a Indmar 454 w/ a Legend pump in my boat. Seems as if the engine temp never goes above 120. Should I add a thermostat? There is no valve coming off of the water inlet from the jet. My set-up puts the water through my exhuast manifolds then into the motor and back out through the exhaust risers.
To be honest, The only reason to choke down water to the engine would be for a serious over pressure situation. Requiring a pressure guage on the water system to indicate that. I doubt it's even needed. I've installed them, but they've all run wide open anyway.
Oil temp is what you SHOULD be monitoring. 120*-140* water temp is pretty normal in these things, provided the engine was built with that in mind, but understand the thermistor sending unit is getting whacked with new water constantly, so is REALLY not that accurate a reading. Oil temp IS.
Ray
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Thanks for all the input. Looks like i am just going to leave it be. have not had any issues with it. Was told that it might run better if the temp was around 140 or so.. but i guess thats just a matter of opinion...
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At idle is when you want the temp to come up to around 120-140 but when cruising the temp. will go all the down cause of the constant flow of fresh water from lake/river/etc. being pumped in faster through the engine and no time to warm it up. like IRReble said the oil temp and pressure is more important to keep and eye on but glance at water temp too. I just look at all mine very often just out of habit. :)
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i am with ...(the rebel) . i have heard that you want to run right around 130 water temp because you are really wanting the oil temp to run at a lowwer temp.. i am no pro and am looking for info.. but i do know the KINGS won tonight so the devils can lick it.. ;D
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no band wagon here i have been a super fan for years.. stickers on the truck and all.... :beer: :beer: :beer: yes i am drinking some