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Tempature

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mwpdrp View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mwpdrp Quote  Post ReplyReply Direct Link To This Post Topic: Tempature
    Posted: July-19-2017 at 5:03pm
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 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jonny Quest Quote  Post ReplyReply Direct Link To This Post Posted: July-19-2017 at 5:19pm
Many will say 140 for carburetor boats and 160 for EFI boats. My carb boat has a 160 thermostat.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: July-19-2017 at 5:51pm
Originally posted by mwpdrp mwpdrp wrote:

   I was told that was to hot,

Thanks
Mike

By whom?


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Post Options Post Options   Thanks (0) Thanks(0)   Quote GottaSki Quote  Post ReplyReply Direct Link To This Post Posted: July-19-2017 at 6:06pm
160 is just fine
"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."

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mwpdrp View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mwpdrp Quote  Post ReplyReply Direct Link To This Post Posted: July-19-2017 at 6:18pm
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote Hollywood Quote  Post ReplyReply Direct Link To This Post Posted: July-21-2017 at 3:44am
He's dead wrong
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Duane in Indy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Duane in Indy Quote  Post ReplyReply Direct Link To This Post Posted: July-21-2017 at 7:06am
Originally posted by Hollywood Hollywood wrote:

He's dead wrong


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
Keep it as original as YOU want it
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Post Options Post Options   Thanks (0) Thanks(0)   Quote phatsat67 Quote  Post ReplyReply Direct Link To This Post Posted: July-21-2017 at 11:11am
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote Hollywood Quote  Post ReplyReply Direct Link To This Post Posted: July-21-2017 at 11:51am
Pull a KENO and swap your "going bad" impeller with your friend and see how they run.
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KENO View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KENO Quote  Post ReplyReply Direct Link To This Post Posted: July-21-2017 at 12:10pm
I like it

Swap thermostats too
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KENO Quote  Post ReplyReply Direct Link To This Post Posted: July-21-2017 at 12:32pm
Maybe he doesn't have a thermostat in his
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MrMcD Quote  Post ReplyReply Direct Link To This Post Posted: July-22-2017 at 12:33am
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote ArtCozier Quote  Post ReplyReply Direct Link To This Post Posted: July-22-2017 at 12:41pm
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.
"Art"
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