Overheating Problem

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  • FishysTees
    • Dec 2016
    • 47

    • Avon Indiana

    • 2005 Super Air Nautique SV211 TE
    #1

    Overheating Problem

    I got a 2005 Air Nautique SV211. I just bought it, and took it out a couple of weeks ago for the first time. The boat ran awesome, until we idled around a little bit. It began to overheat. Got it loaded back up on the trailer, and let it sit for a couple of days, took it back out, and did the same thing. Runs awesome at a high RPM and speed, but at idle and just sitting, the temp goes up, and begins to overheat. Im guessing its the impeller which is a pain to change out in this boat. Any other things to look for. Someone also said some holes or cracks in some hoses somewhere. Any input or advice would help. Not super tech savy, but do know a little bit about it. Let me know if you have any input. Thanks all!

    Its also taking in quite a bit of water. Alot for as little time as I had it on the water. Any suggestions there? Packing??
    Tags: None
  • wakejunky
    Senior Member of PLANETNAUTIQUE
    • Jul 2003
    • 679

    • Ca

    • 2003 SAN
    #2
    If you've blown an impeller, you will more than likely have bits and pieces getting caught in parts of the block and/or cooling components. And since it's a new boat to you, it more than likely happened to the previous owner. It might be worth removing hoses in a few areas, transmission cooler, hose to the water pump etc. just to make sure nothing is floating around. Another place for the pieces to get stuck are at the thermostat housing. It's at the top of the engine where both the exhaust riser hoses attach. Removing the thermostat housing isn't a big task but, is a piece of mind once you get back on the water. And you might as well change out the thermostat while you're at it.

    Comment

    • charlesml3
      1,000 Post Club Member
      • Jan 2008
      • 2453

      • Lake Gaston, NC

      • 2022 G23
      #3
      Originally posted by FishysTees View Post
      until we idled around a little bit. It began to overheat. Got it loaded back up on the trailer, and let it sit for a couple of days, took it back out, and did the same thing. Runs awesome at a high RPM and speed, but at idle and just sitting, the temp goes up, and begins to overheat.

      Its also taking in quite a bit of water. Alot for as little time as I had it on the water. Any suggestions there? Packing??
      You have a worn impeller. These are the classic symptoms. Cools fine running, overheats at idle. Replacing the impeller on a SV-211 isn't that bad. My brother has one and we've done it several times. You need a socket wrench to swing the idler pulley over far enough to get the serpentine belt off. Once it's off, you can position the pulley on the pump to get to the bolts. Get them loose and then the whole front of the pump will come off. Replace the impeller, replace the gasket and put it all back.

      Next you need to figure out where you have water coming in. Get all the water out of the bilge and put the boat in the water and leave the engine off. Use a flashlight and look around for anywhere water could be coming in. It's usually around the prop shaft or possibly the rudder shaft..

      If you don't see anything coming in, start the engine and let it idle. Look around again with the flashlight.

      If it's coming in around the driveshaft, you need to make a call on how much. If it's just dripping then the best thing you can do is just leave it. A drip is NOT a problem. If it's a steady stream you probably need to either SLIGHTLY tighten the packing or possibly replace it. Again, the goal is NOT to keep it from dripping at all.

      -Charles

      Comment

      • FishysTees
        • Dec 2016
        • 47

        • Avon Indiana

        • 2005 Super Air Nautique SV211 TE
        #4
        Ok Great. The dealership I bought it from gave me a 5 hour warranty on it when I bought it and they are standing behind it and going to fix the problem. Just wanted to make sure that I am getting all the possibilities crossed off.

        Charles, It definately isnt just a drip. You are correct, it is supposed to drip something, but definately not what I have been taking in.

        Comment

        • Quinner
          1,000 Post Club Member
          • Apr 2004
          • 2245

          • Unknown

          • Correct Crafts
          #5
          It is only supposed to drip if it has a conventional packing, if dripless, hence the name, no drip. Air leaks will also cause the overheating you described primarily at idle, you would want to check/clean the strainer, make sure gasket is still there, check and tighten (with nutdriver) all hose clamp connections. If unsure age of impeller replace and keep the existing one as a spare assuming it still looks OK. Hopefully they check all these things under the 5hr warranty.

          Comment

          • Coyotefox
            • Mar 2017
            • 8

            • Florida

            • 2000 Super Air Nautique 210
            #6
            Any other ideas on what else could possibly be causing this overheating issue? I have a 2000 210 with the gt40 in it, I ran it all last summeramd worked perfectly. Over the winter I installed new impeller, thermostat, and did a tune up as maintenance, and no for no reason it dose the same thing, perfect temp while running, and temp creeps up while at idel.

            Comment

            • charlesml3
              1,000 Post Club Member
              • Jan 2008
              • 2453

              • Lake Gaston, NC

              • 2022 G23
              #7
              Originally posted by Coyotefox View Post
              Any other ideas on what else could possibly be causing this overheating issue? I have a 2000 210 with the gt40 in it, I ran it all last summeramd worked perfectly. Over the winter I installed new impeller, thermostat, and did a tune up as maintenance, and no for no reason it dose the same thing, perfect temp while running, and temp creeps up while at idel.
              First thing I'd do would be to check that impeller. I know you just replaced it, but it's possible it got too hot somehow and melted a bit which would create this problem. It could also have accidentally been an impeller for a different pump. It's a cheap part to replace.

              It could also be a defective thermostat. Not opening all the way and when you slow down the waterflow slows and it doesn't cool enough.

              -Charles

              Comment

              • H2O
                • Jul 2006
                • 247


                #8
                Running hot at idle then cooling as RPM increases is the classic symptom of a small air leak in the cooling system. The most common culprit is the water strainer not fully tightened or a missing/defective water strainer gasket. Also, make sure all cooling hose clamps are tight.
                Last edited by H2O; 03-13-2017, 11:00 PM. Reason: If it gets too hot the impeller may then be damaged, also.

                Comment

                • Quinner
                  1,000 Post Club Member
                  • Apr 2004
                  • 2245

                  • Unknown

                  • Correct Crafts
                  #9
                  Coyote read what I posted earlier and h2o's comments as well.
                  Hopefully u used a quality oem impeller not one of those pos Sierra's or that could also be your problem.

                  Comment

                  • Coyotefox
                    • Mar 2017
                    • 8

                    • Florida

                    • 2000 Super Air Nautique 210
                    #10
                    Thank you guys. I'm out here checking everything that is a possible air leak culprit now. I'm hoping its that, as it worked perfectly till I did all of the maintenance stuff on it. I used a Jabsco impeller, which is the same 1 and part # as the impeller I pulled out of it. If I cant find any air leaks I will probably try another brand new impeller and thermostat, obviously 1 at a time so I know what the cause was.

                    Comment

                    • kcoben
                      • Sep 2016
                      • 33

                      • Akron,Ohio

                      • 2009 SANTE 210
                      #11
                      A cracked block could explain both.

                      Sent from my SM-G930P using PLT Nautique mobile app

                      Comment

                      • Fgroce
                        • Dec 2016
                        • 179

                        • Middle Georgia

                        • 2002 Ski Nautique
                        #12
                        Man talk about raining on a man's parade, hopefully there is not anything major wrong.

                        Comment

                        • ski4evr
                          Senior Member of PLANETNAUTIQUE
                          • May 2010
                          • 613

                          • Bowling Green, KY

                          • 2005 SV 211
                          #13
                          Read the caution about the gaskets on this page from NP
                          http://www.nautiqueparts.com/product...impeller-1210/
                          2005 SV-211

                          Comment

                          • Coyotefox
                            • Mar 2017
                            • 8

                            • Florida

                            • 2000 Super Air Nautique 210
                            #14
                            Cracked block is very very slim chance. I'm the 3rd owner, know the second owner pretty well, and its been a Florida boat all of its life. I'm thinking more about it being a small air leak. Any tips on how to trace down an air leak?

                            Comment

                            • rossrips7
                              • Feb 2010
                              • 233

                              • Unknown

                              #15
                              Tighten every hose clamp you can find and make sure your strainer cup is threaded on perfectly with the gasket.


                              Sent from my iPhone using PLT Nautique

                              Comment

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