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  1. #1
    Top Dog
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    Short block vs. long block?

    When speaking of Rotax engines (such as the 787), what do the terms "short block" and "long block" indicate?

    Thanks!

  2. #2
    PWCToday.com Is My Home Away From Home WFO Speedracer's Avatar
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    Re: Short block vs. long block?

    Short block used to refer to an engine without a head,if you bought one from Seadoo thats the way it came without a head,the long block was an engine with a head,but now most short blocks for watercraft come with the heads,get it ,got it ,good.

  3. #3
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    Re: Short block vs. long block?

    That's nice and confusing. [grin]

    Why would they ship an engine without a head? Cylinders, pistons, everything but the cap on top? WTF?!?

  4. #4
    PWCToday.com Is My Home Away From Home WFO Speedracer's Avatar
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    Re: Short block vs. long block?

    Thats the way Seadoo used to do it,must be something in the water up there or something.BTW the short blocklong block terminology comes from automotive backgrounds which makes more sense sinc most people can blot on a set of heads on a car fairly easily.

  5. #5
    Tech Guru PWCToday.com Is My Home Away From Home Watercraft Magic's Avatar
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    Re: Short block vs. long block?

    A "true" shortblock comes with no head.

    A rebuilder needs to make sure the motor is within his specs for compression and squish clearances to be able to offer a warranty on the motor, so rebuilders include the head with the "shortblock". Also, it would be very difficult to pressure test a motor with no head on it.
    email Chris at Watercraft Magic cdofixr1@live.com

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