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Stuck Impeller

MNshortlinerMNshortliner Posts: 222 Solid Baller
Had a really tough impeller on a V-drive that wouldn’t budge. Last time I changed it was probably 3-4 years ago, this boat doesn’t get used but maybe 15-20 hours a year. Impeller still looked pretty good, no missing fins. I have an impeller puller but that did not work. Ended up taking the water pump off the fly wheel to work on it in a vise.

Tried letting penetrating oil sit over night and still did nothing. Put the pump in a vise to pull with 2 Vise Grips and still stuck. Also hit it with a hammer and punch on the inside of the impeller core but that did not break it loose. So I ended up using a wood chisel to cut slices down the rubber of the impeller and removed all the rubber off the core.



I did not have any short thin saws-all blades so cut down a shorty with a regular tin snips. Carefully cut trough the core about 80-90% thru the brass so not to hit the splined shaft.




Split the core of the impeller with a hammer and screw driver and it popped right off. After the core came off I inspected the splined shaft and could not find one mark on it from the saw blade. I did use some anti seize on the shaft but after a couple of years it may not keep it from doing this again next time.



Comments

  • MinelickskierMinelickskier Posts: 39 Baller
    Wow! Never seen one like that...had you known it was going to be this bad maybe just get a new pump
  • RednucleusRednucleus Posts: 559 Crazy Baller
    Moral of the story - take out impeller yearly and leave it out if you do a winter layup.
    skihackereyepeeler
  • oldjeepoldjeep Posts: 3,761 ★★★Triple Panda Award Recipient ★★★
    edited October 2020
    Why didn't the impeller puller work?
    Chuck P
    Not a mechanic but I play one at home
  • MNshortlinerMNshortliner Posts: 222 Solid Baller
    @oldjeep the shaft of the water pump and the impeller where stuck together. The hooks on the impeller puller would just “slip” on the rubber.

    I posted this to maybe help someone out in the future. Once I decided to cut it out, it was out in about 30 minutes not really a big deal. I don’t plan on pulling the impeller every year and leaving it out.

    oldjeep
  • oldjeepoldjeep Posts: 3,761 ★★★Triple Panda Award Recipient ★★★
    Weird, the puller is supposed to grab the hub. Good you got it out. I replace mine every 2 to 3 years and luckily have not had one get stuck like that.
    Chuck P
    Not a mechanic but I play one at home
  • 2Valve2Valve Posts: 368 Crazy Baller
    Replace yearly independent of hours. It's cheap insurance in the long run.
    eyepeeler
  • oldjeepoldjeep Posts: 3,761 ★★★Triple Panda Award Recipient ★★★
    edited October 2020
    I don't know - in the long run it has been cheap to change it every 150 hours or so and keep a spare in the glovebox for an emergency. Even after 150 they are like new unless you are running them dry. Waste of resources to be throwing away perfectly good impellers.
    Chuck P
    Not a mechanic but I play one at home
  • A_BA_B Posts: 4,297 Mega Baller
    Did you put antifreeze in the pump for winter?
    I always thought that helped keep it lubricated over winter and initial fireup in Spring.
    ab
  • oldjeepoldjeep Posts: 3,761 ★★★Triple Panda Award Recipient ★★★
    edited October 2020
    Some antifreeze might make it into the raw water pump output side, because I fill the engine through the top of J hose on the circ pump. (pour it in)
    Chuck P
    Not a mechanic but I play one at home
  • jpwhitjpwhit Posts: 96 Baller
    I suspect you just needed a better quality puller that grabbed the hub instead of the rubber part of the impeller. Which puller do you have?
  • Jody_SealJody_Seal Posts: 3,170 Mega Baller
    Might have to press the whole pump assembly apart. Change the seal and maybe even bearings while you have it apart. V
    Hobby Boats can be expensive when the hobbyist is limited on their own skill and expertise.


  • MDB1056MDB1056 Posts: 581 Crazy Baller
    At the outset change every other year, regardless of hours or how it looks. You lose one blade into your cooling passages an it’s go fish.
  • A_BA_B Posts: 4,297 Mega Baller
    what does a new pump cost?
  • oldjeepoldjeep Posts: 3,761 ★★★Triple Panda Award Recipient ★★★
    $150 or so for the standard Johnson FB6 type pump
    Chuck P
    Not a mechanic but I play one at home
  • A_BA_B Posts: 4,297 Mega Baller
    I would get a new pump and work on the old one when I found spare time... keep it as a backup for next time!
  • MinelickskierMinelickskier Posts: 39 Baller
    For a pump you could call skidim at 800 345 0996. These guys are a great resource for ski boat parts and they are very knowledgeable. Ask for Vince
  • MNshortlinerMNshortliner Posts: 222 Solid Baller
    @jpwhit This is the impeller puller I have. It is not designed to grab anything but the rubber core and dig its claws into the rubber to remove the impeller. I don’t see how you could get to the back of the impeller to bypass the rubber and get the hooks onto the back side of the metal. In the vise I had 2 vise grip needle nose pliers locked on and it did not budge while giving it a good “yank”. That’s why I ended up cutting it out.




    @oldjeep i also have probably 5 impellers laying around and in boats from pulling them and installing new ones. All look new and great for back ups.
  • jpwhitjpwhit Posts: 96 Baller
    The metal hub molded into the impeller doesn't go all the way to the front and back of the impeller. This is what I use. If you put it all the way in and clamp the jaws down really tight, the jaws will push through the rubber and grab onto the hub.


    Gar
  • pcmcon729pcmcon729 Posts: 87 Baller
    @jpwhit I like that puller design. Where did you get it?
  • oldjeepoldjeep Posts: 3,761 ★★★Triple Panda Award Recipient ★★★
    Chuck P
    Not a mechanic but I play one at home
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