Correct Thermostat for 78 Nautique |
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Tom_Madison
Groupie Joined: May-16-2009 Location: United States Status: Offline Points: 47 |
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Posted: April-25-2010 at 9:50pm |
I just got the boat a year ago, and the engine never seemed to get up to temp - it stayed at the bottom. (I thought the guage may have been busted.) When I winterized the boat I had to chisel the thermostat out - it was rusted open, replacing it with a 170 degree one. The motor is a Chevy 350 with about 470 hours on it. I just noticed a comment from the previous owner that he had used a 142 degree thermostat. Am I right to use the 170 thermostat?
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hotboat
Gold Member Joined: March-28-2009 Location: Conn Lake Pa Status: Offline Points: 814 |
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I have a 170 in mine but you will get some mixed emotions.
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Brian
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Tom_Madison
Groupie Joined: May-16-2009 Location: United States Status: Offline Points: 47 |
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The answer is: 142 degrees.
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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so you know more than the designers of the engine do then? the engine builder and designer spec'd and installed a 143 degree t-stat from the factory for some odd reason? But guess you know more then they do. |
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Tom_Madison
Groupie Joined: May-16-2009 Location: United States Status: Offline Points: 47 |
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I know nothing about engine thermostats. What I did was to check with the most experienced inboard repair place in Madison, Wi, and they right away mentioned the 143. The previous owner was adamant about the 143. And I went on the web and found this article http://www.hiperformer.com/chevy350/marine_engine.html, and another article (actually someone had created a pdf) that had tech specs from that era 350's, and it indicated they were shipped with the 143. So, despite 143 seeming to be wrong in general for chevy 350 engines, that is what I went with.
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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BTW Tom_Madison I wasn't refering to you,
But I do find it odd that you have a Chevy motor in your 78 SN, does it also spin a left handed prop too? |
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Tom_Madison
Groupie Joined: May-16-2009 Location: United States Status: Offline Points: 47 |
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No, it is a right hand prop. The previous owner showed me how the engine stringers had to be cut down about 3/4 of an inch to accomodate the chevy engine. I understand that very few of these were made. So that makes the boat a valuable collector's item?
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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if it was factory engine which I doubt, but regardless it is what it is.
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Chris, It's called a OMC marinization! It was the premium optional engine. Yes, some people will pay more for the Chev!! In fact, Tom's engine was discussed back in 08. Your memory is going!! BTW, it is a RR. |
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WakeSlayer
Grand Poobah Joined: March-15-2006 Location: United States Status: Offline Points: 2138 |
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Hence your screen name ? |
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Mike N
1968 Mustang |
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hotboat
Gold Member Joined: March-28-2009 Location: Conn Lake Pa Status: Offline Points: 814 |
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lol on the name, maybe Chris should change his to hothead
My motor is slightly different than it started out as well but thanks for noticing. It also helps warm the lake up |
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Brian
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