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anodes size on Rotax (Chap/Scarab...)

Discussion in 'Rotax Engine Topics' started by BobJohnson, Apr 11, 2018.

  1. BobJohnson

    BobJohnson Jet Boat Addict

    Messages:
    409
    Location:
    Highland Park, il
    Ratings:
    +285 / 1
    Boat Make:
    Chaparral
    Year:
    2015
    Boat Model:
    VR
    Boat Length:
    22
    Looking to order replacement anodes before getting boat out of storage. Either to put on if needed or have on hand for future.

    anyone with a Rotax boat know the size of the anodes on our boats? I know there is on on each of the cooling plates under the boat, and it appears there is one on the side of each pump. Little round guys. I know I need Magnesium for my lakes, but just want to get the right size.

    if anyone has access to their boats and can either measure size or let me know if there are any item numbers / descriptions imprinted on them, that would be great... couple pics from on line showing location of anodes...
    pump.jpg anode cool plate.jpg
     
  2. JetTech72

    JetTech72 Jet Boat Addict

    Messages:
    179
    Ratings:
    +102 / 0
    Boat Make:
    SeaDoo
    Year:
    2012
    Boat Model:
    Challenger
    Boat Length:
    23
    Rotax Anode is #461805
    Dimension is 1" dia X 1/2" thick with 1/4" dia hole.
     
  3. BobJohnson

    BobJohnson Jet Boat Addict

    Messages:
    409
    Location:
    Highland Park, il
    Ratings:
    +285 / 1
    Boat Make:
    Chaparral
    Year:
    2015
    Boat Model:
    VR
    Boat Length:
    22
    any idea where to find these online? Been searching for a little while here and coming up empty.
     
  4. JetTech72

    JetTech72 Jet Boat Addict

    Messages:
    179
    Ratings:
    +102 / 0
    Boat Make:
    SeaDoo
    Year:
    2012
    Boat Model:
    Challenger
    Boat Length:
    23
  5. BobJohnson

    BobJohnson Jet Boat Addict

    Messages:
    409
    Location:
    Highland Park, il
    Ratings:
    +285 / 1
    Boat Make:
    Chaparral
    Year:
    2015
    Boat Model:
    VR
    Boat Length:
    22
    @JetTech72 Thank you! Placing order now. That is a dangerous website. Lots of goodies. Gonna save that site for sure. Thanks again!
     
  6. BobJohnson

    BobJohnson Jet Boat Addict

    Messages:
    409
    Location:
    Highland Park, il
    Ratings:
    +285 / 1
    Boat Make:
    Chaparral
    Year:
    2015
    Boat Model:
    VR
    Boat Length:
    22
    well, almost bought these... they turned out to be Zinc anodes. I need magnesium. Search goes on. Still a great site for parts, thanks...
     
  7. Darrell

    Darrell Active Member

    Messages:
    12
    Location:
    01950
    Ratings:
    +4 / 0
    Boat Make:
    Other
    Year:
    1995
    Boat Model:
    X
    Boat Length:
    19
    What would be the reasoning between zinc or magnesium?
     
  8. Compatico

    Compatico Member

    Messages:
    36
    Ratings:
    +9 / 0
    Boat Make:
    Other
    Year:
    2000
    Boat Model:
    Other
    Boat Length:
    19
    Magnesium anodes react at lower electrical potentials which means they will corrode faster and easier than zinc or aluminum - this is a good thing in freshwater, especially if you slip your boat in a marina where electrical potentials are typically worse causing higher rates of galvanic corrosion. Magnesium is a bad choice for saltwater because they will react and corrode very quickly which could leave your boat unprotected from corrosion if you forget to check the anodes. If you trailer your boat, or use a lift at a slip, aluminum is typically adequate. I believe BRP uses aluminum anodes for their drives so no need to change unless you slip your boat. Check your anodes once a month to see how fast they corrode and replace when half worn.
     
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