running temp. carburated 351w |
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shierh
Gold Member Joined: April-29-2015 Location: Florida Status: Offline Points: 605 |
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Posted: May-10-2018 at 1:18pm |
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Review of another post brings this question to mind.
I always wondered why the 140 thermostat for the carbureted 351w engines. I would think the 160 to 170 would be a better range. I seem to remember all my other boats ran in this area, at least the Crusader 454's did. Any thoughts and experience with raising the temp? |
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Lakeview
Senior Member Joined: January-06-2004 Location: Branchville NJ Status: Offline Points: 247 |
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I've been running 143 degree stats forever, never an issue.
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Lakeview
1992 Barefoot Nautique 1967 Barracuda SS 1967 Chris Craft Cavalier |
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WakeskateNW
Groupie Joined: December-08-2016 Location: Lake Tapps, Wa Status: Offline Points: 65 |
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My local nautique dealer does not stock nor will sell me the 143 thermostat for my 89’ SN. It may not be the preferred part among forum members here but I have been running the 160 since last season with no known issues.
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gt40KS
Gold Member Joined: August-05-2017 Location: Wichita Kansas Status: Offline Points: 943 |
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According to the PCM parts manual the 351w was offered with both. Don't know what the difference was - climate maybe? Year or fuel/ ignition type maybe? Makes me wonder which one mine is suppose to get now.... Had been running the 143, which seemed fine.
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JCCI
1995 Ski Nautique GT40 |
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Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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It is my understanding that fuel injected engines prefer the 160,carbs the 143.
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gt40KS
Gold Member Joined: August-05-2017 Location: Wichita Kansas Status: Offline Points: 943 |
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Good to know Gary, I never could find a distinction. I bought a replacement for mine last year at Nautique Parts and if memory serves the 143 is what was indicated so that's what I got. I'll have to order the correct one now.
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JCCI
1995 Ski Nautique GT40 |
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Hollywood
Moderator Group Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13512 |
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You don't need to go to a nautique dealer to get a thermostat.
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10748 |
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Don't trust your memory, read the number that's stamped on it and see what it says If you read the Nautiqueparts website description you would have bought a 160 last year. |
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shierh
Gold Member Joined: April-29-2015 Location: Florida Status: Offline Points: 605 |
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is there any benefit to going up to 160 on these engines?
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gun-driver
Grand Poobah Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4117 |
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No |
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MrMcD
Grand Poobah Joined: January-28-2014 Location: Folsom, CA Status: Offline Points: 3610 |
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I was told the original reason for the 143 thermostat was the engines corroded faster at higher temps in marine applications. This may have originally related to salt water cooling applications, I don't know for sure.
Engines actually perform better at 195 for emissions but you need a closed cooling system to maintain that reliably. Passenger cars all use this as base temp now. The 143 has proven to work fine for boat applications and allows some wiggle room against overheat when you work it really hard. I would stay with the factory set up. |
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gt40KS
Gold Member Joined: August-05-2017 Location: Wichita Kansas Status: Offline Points: 943 |
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The original thermostat I took out had no stamp or markings ... one of the PO's must have used a generic Chinese replacement or something. I did get it from NP, but in all honesty I'm not entirely sure what I typed in for the search - could have just grabbed the first one that said 351w |
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JCCI
1995 Ski Nautique GT40 |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10748 |
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Who cares about the one that came with it? You're saying you don't know what you bought from Nautique Parts, you think it's a 143 so why don't you look at what's stamped into that one? Here's a visual aid |
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gt40KS
Gold Member Joined: August-05-2017 Location: Wichita Kansas Status: Offline Points: 943 |
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Ha ha ... funny funny
No Ken, guess I didn't explain it right. What I was meaning was when I first replaced it early last fall, I looked at the one that came out of it for that "visual clue" but it was not stamped - Chinese or whatever - and that's why I just typed it in the search bar at NP, but apparently got the wrong one. So, now you can razz me about reading the ENTIRE description before adding stuff to the cart |
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JCCI
1995 Ski Nautique GT40 |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10748 |
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So the one you have now must be stamped 143.
Not razzing (this time anyways) It sounded like you weren't sure what you had now and I figured you could look at the stamping. |
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gt40KS
Gold Member Joined: August-05-2017 Location: Wichita Kansas Status: Offline Points: 943 |
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Yep - because it's the one I bought from NP to replace the old generic one that the boat came with. Nothing wrong with it ... only ran it 3 or 4 times in the fall. But knowing now that it's not the right one, I'll get the correct one in there.
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JCCI
1995 Ski Nautique GT40 |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10748 |
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Have I got a deal for you Joe
I'll trade you a brand new 160 PCM thermostat for your "lightly used " 143 if you want. I'll throw in a gasket too |
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