Overheating alarm |
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TurboZinke
Newbie Joined: June-19-2017 Location: Fort Smith, AR Status: Offline Points: 16 |
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Posted: June-21-2017 at 10:19am |
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I have a new to me 1987 SN 2001. My overheating alarm is going off when I park after the boat is warmed up. When to boat is running the temperature gauge shows 160-170.
1. I stop the boat to change skiers 2. Turn off the engine 3. Sit for a couple minutes (engine and key off) 4. Turn the key back on to ignition The gauge will show 220 degrees and the horribly loud alarm will go off. Once I start the engine and the cooling pump is going the temperature comes right back down to normal temperature. If I accelerate the throttle it cools off even faster. New to CC and never had this issue on any of my other boats. Does the water in the block get super hot like 220 degrees, specifically where the temperature sensor is located? |
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Never miss a good chance to shut up ~ Will Rogers
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SNobsessed
Grand Poobah Joined: October-21-2007 Location: IA Status: Offline Points: 7102 |
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You might want to verify temp with an IR thermometer. They are about $20. Very useful item. Maybe the sending unit is bad.
What year boat do you have? |
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“Beer is proof that God loves us and wants us to be happy.”
Ben Franklin |
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TurboZinke
Newbie Joined: June-19-2017 Location: Fort Smith, AR Status: Offline Points: 16 |
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It is a 1987 2001 Nautique with a stock 351w. I have an infrared thermometer. Do you have a recommendation about where I should measure and what temperature it should be?
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Never miss a good chance to shut up ~ Will Rogers
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bb12
Senior Member Joined: March-24-2009 Location: Kansas, USA Status: Offline Points: 355 |
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Hit it all over the block and see what it's reading, but more specifically at the water temp sending unit on the top of the intake manifold. Also confirm what type of thermostat you have...should be a 143 for a carbed 351.
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1989 Ski Nautique 2001
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fgroce
Senior Member Joined: July-05-2016 Location: Georgia Status: Offline Points: 350 |
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My dad's 88 2001 would sometimes alarm on restart after a hard run. Is your impeller new?
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FGroce
88 Ski Nautique For 28 years Now 2002 Ski Nautique |
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spiralhelix
Senior Member Joined: August-06-2014 Location: IL/WI Status: Offline Points: 496 |
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Congrats on the new to you boat!!! I'm sure you will enjoy it. any pics?
My boat did this and I searched this site and as others have explained in those posts...when you run the boat hard and then stop, the water isn't "cooling" the engine, so the water in the block will heat up, but shouldn't heat up to dangerous levels. Read TRBenj's second response of the thread: Thread Link As a side note: A former MC employee clarified the thermostat differences in a thread earlier this week. He stated that PCM engines in fresh water environments operate efficiently at 160º, but running in salt water, the optimum temp is 142º (he made a point of saying 142 and not 140) . He said running cooler in fresh doesn't hurt anything, just less optimal. can anyone else confirm or deny this? I couldn't find any sources. |
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-Spiral
'89 Sport Nautique |
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Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Here is skidims take- link
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Cy,
Here's the fix: Seriously, the comments above are correct. Welcome to CCfan, We'd love to see some pictures when you get a chance. |
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spiralhelix
Senior Member Joined: August-06-2014 Location: IL/WI Status: Offline Points: 496 |
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I pulled the harness from the alarm as suggested by these guys. It started having a mind of it's own. If you go this route, just keep a close eye on your gauges. |
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-Spiral
'89 Sport Nautique |
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TurboZinke
Newbie Joined: June-19-2017 Location: Fort Smith, AR Status: Offline Points: 16 |
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OK I think I figured out what is happening. It is getting hot when parked because the exhaust manifolds are leaking. Dang it! I started a new thread and then I finally put it all together
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Never miss a good chance to shut up ~ Will Rogers
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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No it's not!!
I agree with Tim. |
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