running temp. carburated 351w
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=42765
Printed Date: April-28-2024 at 1:22pm
Topic: running temp. carburated 351w
Posted By: shierh
Subject: running temp. carburated 351w
Date 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? |
Replies:
Posted By: Lakeview
Date Posted: May-10-2018 at 1:38pm
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I've been running 143 degree stats forever, never an issue. ------------- Lakeview 1992 Barefoot Nautique 1967 Barracuda SS 1967 Chris Craft Cavalier |
Posted By: WakeskateNW
Date Posted: May-10-2018 at 11:51pm
| 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. |
Posted By: gt40KS
Date Posted: May-12-2018 at 2:34am
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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. ------------- JCCI 1995 Ski Nautique GT40 |
Posted By: Gary S
Date Posted: May-12-2018 at 11:10am
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It is my understanding that fuel injected engines prefer the 160,carbs the 143. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |
Posted By: gt40KS
Date Posted: May-12-2018 at 11:53am
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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. ------------- JCCI 1995 Ski Nautique GT40 |
Posted By: Hollywood
Date Posted: May-12-2018 at 12:49pm
| You don't need to go to a nautique dealer to get a thermostat. |
Posted By: KENO
Date Posted: May-12-2018 at 1:28pm
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. |
gt40KS wrote:Posted By: shierh
Date Posted: May-14-2018 at 1:55pm
| is there any benefit to going up to 160 on these engines? |
Posted By: gun-driver
Date Posted: May-14-2018 at 3:33pm
No |
Posted By: MrMcD
Date Posted: May-14-2018 at 6:49pm
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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. ------------- |
Posted By: gt40KS
Date Posted: May-14-2018 at 9:54pm
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  ------------- JCCI 1995 Ski Nautique GT40 |
Posted By: KENO
Date Posted: May-14-2018 at 10:07pm
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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Posted By: gt40KS
Date Posted: May-14-2018 at 11:41pm
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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  %20" rel="nofollow - ------------- JCCI 1995 Ski Nautique GT40 |
Posted By: KENO
Date Posted: May-15-2018 at 12:04am
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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. |
Posted By: gt40KS
Date Posted: May-15-2018 at 12:28am
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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. ------------- JCCI 1995 Ski Nautique GT40 |
Posted By: KENO
Date Posted: May-15-2018 at 12:39am
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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 |