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Tempature |
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mwpdrp 
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Joined: July-12-2016 Location: Michigan Status: Offline Points: 26 |
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 Topic: TempaturePosted: July-19-2017 at 5:03pm |
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Have a 1994 Sport Nautique and a 1989 Ski Nautique. Both run at 160 degrees. I was told that was to hot, and that 140 was what it should be. Is that correct???
Thanks Mike |
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Jonny Quest
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Joined: August-20-2013 Location: Utah--via Texas Status: Offline Points: 2979 |
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Posted: July-19-2017 at 5:19pm |
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Many will say 140 for carburetor boats and 160 for EFI boats. My carb boat has a 160 thermostat.
JQ |
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2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: July-19-2017 at 5:51pm |
By whom? |
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GottaSki
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Joined: April-21-2005 Location: NE CT Status: Offline Points: 3363 |
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Posted: July-19-2017 at 6:06pm |
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160 is just fine
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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
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mwpdrp
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Posted: July-19-2017 at 6:18pm |
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The person that told me has a 1994 . His done run at 140.
I'm fine with mine at 160. He just keeps telling me my impeller is going bad. Mike |
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Hollywood
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Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13515 |
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Posted: July-21-2017 at 3:44am |
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He's dead wrong
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Duane in Indy
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Joined: October-26-2015 Location: Indiana Status: Offline Points: 1578 |
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Posted: July-21-2017 at 7:06am |
Agreed! Takes 5 minutes to prove him wrong, pull the cover and look. Gauges are inaccurate anyway. Shoot the sender with an IR thermometer and see. Or just ignore it. Mine reads 155 and shoots 143 
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Keep it as original as YOU want it
1978 Mustang (modified) |
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phatsat67
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Joined: March-13-2006 Location: Indiana Status: Offline Points: 6157 |
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Posted: July-21-2017 at 11:11am |
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Usually carb boats have a 143 degree thermostat in them and efi boats run a 160.
143 always runs 145-160 degrees on the gauge and the 160 runs 160-175. As the gauges and wiring age they become slightly inaccurate. Doesn't sound like anything is amiss on either boat as long as temp stays steady. |
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Hollywood
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Posted: July-21-2017 at 11:51am |
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Pull a KENO and swap your "going bad" impeller with your friend and see how they run.
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KENO
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Joined: June-06-2004 Location: United States Status: Offline Points: 11125 |
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Posted: July-21-2017 at 12:10pm |
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I like it
Swap thermostats too |
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KENO
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Posted: July-21-2017 at 12:32pm |
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Maybe he doesn't have a thermostat in his
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MrMcD
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Joined: January-28-2014 Location: Folsom, CA Status: Offline Points: 3750 |
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Posted: July-22-2017 at 12:33am |
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I read years ago that Marine engines were held to 140 degrees to help slow corrosion inside the block. I believe it was mostly for salt water engines but all marine engines were given the 140 stat. FI engines perform better at 160 so a new temp was introduced.
I have not heard of any corrosion issues at 160 and they have been out over 20 years now. |
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ArtCozier
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Posted: July-22-2017 at 12:41pm |
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A 140 t-stat yields a 160 outlet temp because the t-stat bypass allows some raw water to mix with the recirculating hot water from the circulation pump.
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"Art"
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mwpdrp wrote: