Announcement

Collapse
No announcement yet.

PCM 303 overheating

Collapse
X
Collapse
 
  • Page of 2
  • Filter
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
    #1

    PCM 303 overheating

    Hey guys, first time out this year and I'm overheating. I changed the impeller a few weeks ago, so I thought that may be the problem but I just checked it and it looks great. When I took out the housing a bunch of water drained out, so it is sucking some water it seems.

    So, I'm checking out the strainer (I think) and I'm seeing some drops coming from hose clamp. See the pic. The hose clamp itself is tight, and the drips seem to come from the grey plastic end cap part

    Do you think this could be the problem? If so do you think I can fix it?

    Thanks!

    Tags: None
    #2
    Well I tightened everything up so it's not dripping anymore, but I'm still overheating. I can't think of anything else

    Comment

      #3
      Stuck thermostat?

      Sent from my VS995 using Tapatalk
      "I think I am pretty smart for an idiot"

      Comment

        #4
        Temp reading gradually goes up after a cool off period, not sure if a stuck thermostat would do that

        Comment

          #5
          What did the old impeller look like?? Any pieces missing off of it when you pulled it out?? Can you see your strainer filling with water?? Does strainer still have big black gasket in it??
          Last edited by freeheel4life; 06-18-2017, 06:24 AM.

          Comment

            #6
            Originally posted by freeheel4life View Post
            What did the old impeller look like?? Any pieces missing off of it when you pulled it out?? Can you see your strainer filling with water?? Does strainer still have big black gasket in it??
            Old impeller was fine, no missing pieces. Strainer seems to fill, although I did see some air bubbles in it. I did not see any black gasket in the strainer.

            My guess is and I'm hoping it's the thermostat . First time out this year, we launched in a clean weed free area, heater was properly winterized, and the boat has never had overheating issues before.

            I dropped it off at the shop, I'll report back the diagnosis !

            Comment

              #7
              when I bought my boat a few years ago the dealer had just changed the impeller. When we took it out the boat it was overhearing, turns out the center of the impeller was spinning inside of it and causing the impeller to spin slow.

              Comment

                #8
                I would check the rest of the lines between the thru hull and impeller to make sure there isn't a blockage. It may be getting water but is it getting enough?

                Comment

                  #9
                  Also, double check to see if the gasket is in place between the strainer bowl and top. If the pump can draw air through this location, it could easily minimize the am out of water being drawn in. In any pump application, if it can draw air over fluid it will.

                  Sent from my VS995 using Tapatalk
                  "I think I am pretty smart for an idiot"

                  Comment

                    #10
                    A drip from the strainer can be normal. i did not like the idea of dripping fitting. i redid mine with PVC thread seal tape and new bands. has been good since. This is not the cause of an overheating problem.

                    here is the real dumb check - make sure your valves are all open to the strainer and engine.... I missed one once and it took a while to find the issue.

                    Also is your serpentine belt shot? that could cause a problem with overheating.

                    Also i have heard if the vanes of the impeller are backwards of direction it could cause a problem.... i have no direct knowledge of this issue though.

                    Comment

                      #11
                      Super off chance, but you said that you didn't find a gasket in strainer. There should be one
                      https://www.nautiqueparts.com/produc...rainer-gasket/

                      Totally off chance but without it you can get air on suction side of water pump loop and could be starving your engine for water at higher rpms. Again this is a small chance..but if that gaskets not inside your strainer it could be possible. Also verify that you put in the correct size impeller. Can look at pcm part # in shop tomorrow.

                      EDIT- missed that dandy said exact same thing
                      Last edited by freeheel4life; 06-20-2017, 01:20 AM.

                      Comment

                        #12
                        Thanks for all the replies. I did not see that gasket, but I could have easily missed it. the strainer has never been opened before so not sure why it would be missing. I was in a weed free lake so really don't think anything could have lodged in the lines. Serpentine belt seams normal and rotating everything just fine. 99% sure the impeller was correctly placed and sized right.

                        I should have really inspected the strainer and gasket more. Anyway it's in the shop now so we'll see what it is soon. I needed them to replace the steering cable anyways

                        Comment

                          #13
                          Update: 3 trips to the dealer and we still cannot find the source of overheating. This is how events have played out since the last episode:


                          • Dealer looks at the obvious things first (strainer, impeller, blockages etc) then hooks it up to fake a lake and cannot get it to overheat. Seams fine!

                          • I take it on vacation and enjoy 2 hours of riding and surfing. Then the temp started to rise again. get towed in.

                          • Bring it to a second lake on way back from said vacation and give it another chance. Now it's keeping temperature between the boat launch and our dock! Shut it off for an hour, grilled some meat and headed out for a surf. Overheats again.

                          • Dealer then replaces thermostat, thinks it was sticking due to the condition of it. hooks it to fake a lake and it maintains temperature

                          • Bring it to lake, overheats right away

                          • Back to dealer. He replaces impeller (slight wear from past week), checks and tightens strainer and something else that was a little loose near the motor. Runs it on fake a lake and it maintains temperature

                          • Back to lake. Runs great for 2 hours, then temp rises again. Get towed in by fellow Tige owner with a sweet new R21.

                          • Now it’s back at the dealer. He is checking everywhere for air leaks at this point. The impeller housing bearings are normal, belt looks fine, no sign of blockage, oil is normal.

                          Any Tige owners out there with more good ideas on what the problem could be? My hope is that it’s just sucking air from somewhere.

                          Comment

                            #14
                            Have hoses been removed from trans cooler and visually inspected for blockage?? Shouldn't be as strainer should catch debris, but who knows. Worth looking at everything.
                            Been down this road on a 343 and that ended up being the problem. Has your dealer contacted PCM?? Sherwood Starbird works over there and has helped me out more than once on some stuff.

                            Comment

                              #15
                              Lost my gasket on my strainer. Overheated every time until I got it replaced. Took me a while to figure out that was the problem.


                              Sent from my iPhone using Tapatalk Pro

                              Comment

                              Previous 1 2 template Next
                              Working...
                              X