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Cooling water impellar replacement

Discussion in 'Yamaha AR240, SX240, 242 Limited / S / X/ E-Series' started by John Greenlund, Jul 9, 2018.

  1. John Greenlund

    John Greenlund Member

    Messages:
    13
    Location:
    Table Rock Lake, MO
    Ratings:
    +6 / 1
    Boat Make:
    Yamaha
    Year:
    2011
    Boat Model:
    Limited
    Boat Length:
    24
    My boat mechanic says that my starboard engine is overheating with extended idling because the rubber impellar needs to be replaced. I have no idea how old it is as I got the boat used. At speed or short idling periods it runs fine. Is it a big deal to replace them? I have pulled the drive out once to clear a chunk of wood but haven't gone in any deeper than that.
     
    • Funny Funny x 2
    • Dislike Dislike x 1
  2. McMark

    McMark Jetboaters Lieutenant

    Messages:
    1,227
    Location:
    Monongahela, PA
    Ratings:
    +1,193 / 25
    Boat Make:
    Yamaha
    Year:
    2015
    Boat Model:
    AR
    Boat Length:
    24
    There are no rubber impellers. Maybe need thermostats or a descaling? Clean out the little strainer where the cooling water enters maybe?
     
    • Agree Agree x 3
  3. Scottintexas

    Scottintexas Jetboaters Captain

    Messages:
    2,871
    Location:
    Corinth, TX (DFW)
    Ratings:
    +1,824 / 43
    Boat Make:
    Yamaha
    Year:
    2007
    Boat Model:
    AR
    Boat Length:
    23
    I'd ask him to see the part # on the schematic for that, or I probably wouldn't even go back, you're better off with a jetski mechanic,

    Did the previous owner use the boat in salt water?
    Do you have all four indicator holes pumping water at speed,
    Do any of the clamps in the engine bay look rusted?
    How long is "extended idling"? 2 minutes, 5minutes, 20 minutes ?
    Do you have shutoff valves installed?
    What is your oil level at?

    You might want to consider buying a YDS unit to read your engines and help diagnose on the water,
     
    • Agree Agree x 2
  4. John Greenlund

    John Greenlund Member

    Messages:
    13
    Location:
    Table Rock Lake, MO
    Ratings:
    +6 / 1
    Boat Make:
    Yamaha
    Year:
    2011
    Boat Model:
    Limited
    Boat Length:
    24
    Thanks for the insight McMark So where or how does water get circulated without impellars? Here in the picture is what I assume is the water intake which is clear. IMG_0670.JPG
     
  5. boudin

    boudin Well-Known Member

    Messages:
    291
    Location:
    Lake Livingston, Texas
    Ratings:
    +213 / 8
    Boat Make:
    Yamaha
    Year:
    2008
    Boat Model:
    AR
    Boat Length:
    21
    Agreed. If the mechanic thinks the boat has an impeller for cooling, then you need a new mechanic. There is no cooling impeller on the Yamaha boats. He's going to be throwing parts at it.

    Intake strainer is going to be that little rectangular box on the side of the pump.



    -Greg
     
    • Agree Agree x 2
    • Informative Informative x 1
  6. Neutron

    Neutron Jetboaters Lieutenant

    Messages:
    1,123
    Location:
    New Bern, NC
    Ratings:
    +1,106 / 7
    Boat Make:
    Yamaha
    Year:
    2016
    Boat Model:
    AR
    Boat Length:
    24
    That is your exhaust outlet
     
    • Like Like x 1
    • Agree Agree x 1
  7. John Greenlund

    John Greenlund Member

    Messages:
    13
    Location:
    Table Rock Lake, MO
    Ratings:
    +6 / 1
    Boat Make:
    Yamaha
    Year:
    2011
    Boat Model:
    Limited
    Boat Length:
    24
    The boat was previously owned in Wisconsin and is super clean with no sign of salt water useage. No rust on the clamps and both pee holes are pumping water fine. The only time it showed over heating was at the dock after about ten/fifteen minutes and when I winterized it in the driveway as I was flushing it with antifreeze. Running it normally there doesnt seem to be a problem. A YDS should help me figure out what is going on.
     
  8. Scottintexas

    Scottintexas Jetboaters Captain

    Messages:
    2,871
    Location:
    Corinth, TX (DFW)
    Ratings:
    +1,824 / 43
    Boat Make:
    Yamaha
    Year:
    2007
    Boat Model:
    AR
    Boat Length:
    23
    the video above should be a great help to you,

    running on a hose isn't uncommon to throw a temp warning as the water pressure at some homes isn't enough or people use a splitter to try to do both at once even further reducing pressure,

    if you only had one other overheat occurrence around your dock I wouldn't worry about this problem until it shows up 4-5 more times while on the water, theory is that the engines actually cool better at higher rpm because they're getting more water pumped through them than at idle or no-wake speed,
     
  9. John Greenlund

    John Greenlund Member

    Messages:
    13
    Location:
    Table Rock Lake, MO
    Ratings:
    +6 / 1
    Boat Make:
    Yamaha
    Year:
    2011
    Boat Model:
    Limited
    Boat Length:
    24
    I see the screen now. So the next step is to check/clean the screen by accessing it from the outside as shown in the picture?
    Thinking back on my brief conversation with my mechanic who is IMG_0671.JPG very fair and honest I think he was probably thinking about my Bayliner not my jet boat.
     
    • Agree Agree x 2
    • Like Like x 1
  10. Scottintexas

    Scottintexas Jetboaters Captain

    Messages:
    2,871
    Location:
    Corinth, TX (DFW)
    Ratings:
    +1,824 / 43
    Boat Make:
    Yamaha
    Year:
    2007
    Boat Model:
    AR
    Boat Length:
    23
    yes but it's the inside of the nozzle portion where the screen that it sucks water from and that needs to be clear, you don't have to take that apart unless you see some indication, it probably won't have anything noticeable on it, I would run it again at the lake and intentionally leave it at idle to see if you can duplicate it, I'm thinking you won't, there probably just happened to be something in the impeller or screen that just happened to be enough to cause an issue and then was blown out when you increased rpm's.

    It's good you have someone you have faith in for maintenance, being big jet skis some boat mechanics aren't familiar with issues like cleanout plugs, cavitation or loose silicone and end up leading people down an endless road of fixes or over filling the oil,

    .
     
    • Agree Agree x 2
  11. Scottintexas

    Scottintexas Jetboaters Captain

    Messages:
    2,871
    Location:
    Corinth, TX (DFW)
    Ratings:
    +1,824 / 43
    Boat Make:
    Yamaha
    Year:
    2007
    Boat Model:
    AR
    Boat Length:
    23
    at the :59 second mark in the video is what needs to be clear,

    .
     
  12. John Greenlund

    John Greenlund Member

    Messages:
    13
    Location:
    Table Rock Lake, MO
    Ratings:
    +6 / 1
    Boat Make:
    Yamaha
    Year:
    2011
    Boat Model:
    Limited
    Boat Length:
    24
    Thanks everyone for help and explanations. I'll watch for any overheating issues but when running it normally for almost a week after the overheating incident I had no problem. I feel better now!
     
  13. Scottintexas

    Scottintexas Jetboaters Captain

    Messages:
    2,871
    Location:
    Corinth, TX (DFW)
    Ratings:
    +1,824 / 43
    Boat Make:
    Yamaha
    Year:
    2007
    Boat Model:
    AR
    Boat Length:
    23
  14. John Greenlund

    John Greenlund Member

    Messages:
    13
    Location:
    Table Rock Lake, MO
    Ratings:
    +6 / 1
    Boat Make:
    Yamaha
    Year:
    2011
    Boat Model:
    Limited
    Boat Length:
    24
    Dang. Thanks for the heads up on the oil coolers. Sure enough, both my number 3 bolts are missing. There is a miniscule bit of oil on the bottom of each but that may be a remnant from the last filter change. I'm not quite yet at 100 hours. I'll clean the bottom of each and then monitor them.
     
    • Optimistic Optimistic x 1
  15. Julian

    Julian Jetboaters Fleet Admiral Staff Member Administrator

    Messages:
    11,434
    Location:
    Raleigh, NC 27614
    Ratings:
    +8,494 / 120
    Boat Make:
    Yamaha
    Year:
    2016
    Boat Model:
    242X E-Series
    Boat Length:
    24
    My guess is that you picked up some weeds and this was what caused your cooling issues. It can't hurt to pull of the square caps of the intake strainers just to check that you don't have some obstruction in there (its good to get to know the inner workings of your boat anyway- and this is an easy check to make).
     
  16. boudin

    boudin Well-Known Member

    Messages:
    291
    Location:
    Lake Livingston, Texas
    Ratings:
    +213 / 8
    Boat Make:
    Yamaha
    Year:
    2008
    Boat Model:
    AR
    Boat Length:
    21
    Okay because you are from MO and a freshwater boat. Don't try this with a saltwater boat without plenty of heat. Those 10mm bolts on the strainer snap easily.

    -Greg
     
  17. Julian

    Julian Jetboaters Fleet Admiral Staff Member Administrator

    Messages:
    11,434
    Location:
    Raleigh, NC 27614
    Ratings:
    +8,494 / 120
    Boat Make:
    Yamaha
    Year:
    2016
    Boat Model:
    242X E-Series
    Boat Length:
    24
    Which reminds me....I should remove mine since I was in salt water just to be sure they don't sieze in place. This is regular maintenance that all salt water boaters should probably do yearly - remove the pumps and any external fixtures that they might want to remove in the future. Probably is something that Yamaha should include in their service manual for salt water boaters. @Cobra Jet Steering LLC curious if you do this routinely, or if you dismantle yours regularly enough not to need to?
     
  18. boudin

    boudin Well-Known Member

    Messages:
    291
    Location:
    Lake Livingston, Texas
    Ratings:
    +213 / 8
    Boat Make:
    Yamaha
    Year:
    2008
    Boat Model:
    AR
    Boat Length:
    21
    I use a light coating of marine grease on all pump, pump shoe or ride plate bolts.

    I'm sure there are differences of opinion here, but IMHO I think you are asking for trouble removing them just for the sake of removing them. I would just wait until you need to, and then use plenty of heat.

    -Greg
     
  19. Cobra Jet Steering LLC

    Cobra Jet Steering LLC Jetboaters Admiral

    Messages:
    2,935
    Location:
    Florida
    Ratings:
    +2,687 / 53
    Boat Make:
    Yamaha
    Year:
    2014
    Boat Model:
    Other
    Boat Length:
    Other
    I rinse my pumps vigorously after each outing, I also use zinc in several places around the pump and ride plate and spray everything except the anodes with white lithium grease.
    If you want to prevent bolts from sticking use bees wax it works better than anything I have used and it is readily available and inexpensive , I use it for sanding and grinding aluminum also .
    Bees wax is commonly found in the pluming section of your hardware store, they make toilet bowl base gaskets from it . truth is stranger than fiction, I always used that wax on my outboard water pump impellers as well because water won't wash it off.
     
    • Like Like x 2
    • Informative Informative x 1

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