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TexasTexas95

Boat Running better???

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TexasTexas95

So my boat typically runs at about 160-176 on any given day pulling surfers and boarders or cruising. I'll notice it climb to 179 for a bit when I turn the boat off which makes sense since the water in the block is just sitting. When I turn the boat back on, it will go down significantly down in the 160's unless I really start pulling a lot of weight surfing and then it's back in the low 170's. Today for some reason, I noticed the boat won't climb past 145 even when the boat is at a halt with motor off. Surfing, boarding, it's down as low as 129. What gives, I have changed the impeller exactly 40 hours ago and just check the oil level. Normally, the block is honestly too hot to touch. Now I can touch it. Is my boat about to explode or should I enjoy the cooler temps? Oh, and who can tell me how to fix the broken studs in my dash. This is a 2011 23LSV with the 350 Monsoon. 

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Rednucleus

Maybe the thermostat is sticking open? Not dangerous but may not perform as well at lower temperatures. Also can never rule out a bad sender or gauge, except you say it feels noticeably cooler.

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TexasTexas95

Yes, it's absolutely noticeably cooler. My first thought was a stuck open thermostat also. 

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Nitrousbird

You should pull the thermostat and replace it.  Too cheap of a part to just check it.  I'm guessing you don't have a saltwater series - open cooling systems have more chance for thermostat damage.

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Bozboat

you can test the thermostat by putting in a pot of water and using a kitchen theremometer. It should be closed until the water temp rises to 160. 

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Chatty21VLX
4 hours ago, Nitrousbird said:

You should pull the thermostat and replace it.  Too cheap of a part to just check it.  I'm guessing you don't have a saltwater series - open cooling systems have more chance for thermostat damage.

+1 it's like a $12 part

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oldjeep
Just now, Chatty21VLX said:

+1 it's like a $12 part

more like $30-$40 if you are using the brass marine thermostats

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Chatty21VLX
Just now, oldjeep said:

more like $30-$40 if you are using the brass marine thermostats

+1 it's like a $35 part ;) 

I have had a few beers tonight...

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Bozboat
9 hours ago, Chatty21VLX said:

+1 it's like a $12 part

Yes, but testing the old one will let you know if you found the problem and testing the new one before installing will prevent a bunch of swearing when it dawns on you that the new one might be defective.

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