SBT Jetski Engines, Parts & Accessories

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  1. #1
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    Default Sea Doo engine longevity

    Hi All

    Iím new to this site and to this sport.
    I have a question, that for some reason will not post. I only get about the first three lines. Any Ideas?

    Dino Doo
    Last edited by Dino Doo; 09-21-2004 at 04:30 PM. Reason: missing most of body

  2. #2
    Joined
    Nov 2003
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    Glendora, CA
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    6,846

    Default Re: Sea Doo engine longevity

    Write the question in three lines or less.
    Bill O'Neal <br>
    WCM
    <a href="http://www.watercraftmagic.com"

  3. #3
    Joined
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    Default Re: Sea Doo engine longevity

    Stop trying to use formating and just type. I don't know what you're doing wrong, but all you need to do is type and hit submit.
    SBT Tech Support is here to help with your problems.
    We try to answer each question quickly and accurately.
    Please do not use Private Messaging for Tech Support, use the forums.

  4. #4
    Joined
    Aug 2004
    From
    Ohio
    Posts
    134

    Default Re: Sea Doo engine longevity

    Quote Originally Posted by Bill O'Neal2
    Write the question in three lines or less.
    LMAO!!!!!:p

  5. #5
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    Default Re: Sea Doo engine longevity

    Thanks Bill for your wisdom.
    Iím new to this site and to this sport.

    I recently purchased some project SeaDooís , a 92 XP, 94 SP and a 95SP. All with broken 580ís.

    I have 5 years and over 100 hours of ultralight (UL) flying experience. In ultralights, the Rotax engine is common and reliable power. Probably 80% of the ULís have Rotaxís. That is one reason why I chose a SeaDoo.
    I have been doing research and looking for parts over the last month. One of the surprising things that I have noticed is the difference in the reliability of the Rotax. The UL version of the 587 is a 582. This engine in an UL will last +300 hours if maintained well.

    I spoke to my guru friend in ULís and asked him how to avoid the rotary valve surface gaulding and the brass gear failure. He did not have a solution because he had rarely seen one fail in an UL. I also asked him about the oil pumps and would it be better for me to premix the oil. His reply was the oil injectors are very reliable.

    In another thread a SeaDoo is compared to a Yamaha. Many on the post commented of SeaDoos are not reliable and sited the engine problems.

    I understand that oil is very important to engine longevity. I expect to use the same oil as in my UL. It meets the standards, I forget the initials, for Rotax PWC engines. Itís Pennzoil 2 cycle for air cooled engines.

    I expect another thing to throw into this equation is the mentality of, If the engine starts lets go, full throttle till we get back to the dock, then it sits for a few days with water or moisture in the hull. That canít do any good for it.

    What can I do while rebuilding or using them to make the engine last 200 hours?
    Last edited by Dino Doo; 09-21-2004 at 06:34 PM.

  6. #6
    Joined
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    Glendora, CA
    Posts
    6,846

    Default Re: Sea Doo engine longevity

    I have customers with 10-15 year old 580's with HUNDREDS of hours on them and still run great. But, typically, they are people who take care of their watercraft, do not run them in salty waters and have no young people trying to do spins and subs. They keep the bilge dry and the oil tank full, and avoid riding over shallow rock beds and sand bars. They get them serviced each year too.

    The 580 line of Rotax motor is used in everything from PWC's to generators and avaition, and more
    .
    I have rebuilt them for most uses.

    Airplanes do not normally injest water, which when squeezed between the rotary valve and the RV cover, removes material from the cover. Believe it or not, I occasionally get an old yellow 580 in here that the RV surfaces look great.
    Rotary valve gears almost never wear out. They get stripped when some foriegn object stops the rotary valve or they are allowed to run without oil.
    Probably 99% of the 580's that need to be rebuilt, the cause is some form of water injestion, either through the intake when riding, or from the exhaust and muffler condensation when parked. Less than 5% of the pwc owners know what fogging oil is or where and when to use it. But, the street rap on the Rotax motors is "weak crankshaft bearings", "seal problems" and the like.
    In reality, it is maintence, or lack of it that causes these problems.

    The old 580's are as reliable as any watercraft engine that was ever built if maintained properly.

    BTW, I found an almost fatal flaw in a brand new Rotax 582 that a customer sent here from Texas for me to inspect before he put it into his helicopter. The wiring loom that goes from the magneto to the coil runs externally on the side of the motor. There is a spot where it passes a very sharp piece of metal. I can easily see this wearing a hole in the wire loom, grounding out the coil. Should that happen, his helicopter would possibly become his coffin. I put a durable hard rubber sheath over this part of the wiring harness, and took some of the sharp edges off the metal bracket holding the harness.
    Bill O'Neal <br>
    WCM
    <a href="http://www.watercraftmagic.com"

  7. #7
    Joined
    Nov 2003
    From
    Glendora, CA
    Posts
    6,846

    Default Re: Sea Doo engine longevity

    Oh, And choose carefully who you listen to at any internet site that deals with pwc's. For a sport where great mechanics/shops are so few and far between, there sure seems to be an overabundant amount of experts on the internet willing to comment on just about everything.

    I agree with your friend about the 580 series Rotax motor. It is one stubborn and strong little motor. Most keep on running despite what the people who own them do to them.
    Bill O'Neal <br>
    WCM
    <a href="http://www.watercraftmagic.com"

  8. #8
    Joined
    Aug 2004
    From
    Central NJ
    Posts
    77

    Default Re: Sea Doo engine longevity

    [QUOTE=Bill O'Neal2]Oh, And choose carefully who you listen to at any internet site that deals with pwc's. For a sport where great mechanics/shops are so few and far between, there sure seems to be an overabundant amount of experts on the internet willing to comment on just about everything.
    /QUOTE]

    But If you read it on the internet is HAS to be true, right... right...
    When in doubt throttle it out...

  9. #9
    Joined
    Sep 2004
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    Indy
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    3

    Default Re: Sea Doo engine longevity

    Thanks Bill for your time punching that out for us.

    You confirmed two of ideas for the cause of early failure, Care and water ingestion. I'll do what I can to learn care and feeding of the Seadoo.
    As I said earlier, I'm a newbie.

    Are there any good books that would help me learn some dos and don'ts?

    Dino Doo

  10. #10
    Joined
    Mar 2003
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    SBT
    Posts
    21,545

    Default Re: Sea Doo engine longevity

    No books - but start by watching all the videos and reading all the tech articles on this forum.
    SBT Tech Support is here to help with your problems.
    We try to answer each question quickly and accurately.
    Please do not use Private Messaging for Tech Support, use the forums.

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