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  1. #1

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    2003 155......Any problem with using a newer head on this motor???

    I know there was some differences in the newer heads mainly oil restrictor ??? Was it 2005 or 2006 they changed the heads and is there any problem using the newer one on the older motor.

    Bought the ski for 1k with a dropped valve.....luckily it only damaged the piston and head....no damage to the block


  2. #2
    You would need to use the 06 and newer rocker shaft and pull the oil restrictor out of the block.

  3. #3

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    Quote Originally Posted by 8 is enough View Post
    You would need to use the 06 and newer rocker shaft and pull the oil restrictor out of the block.
    so 05 and older should be a drop in????

  4. #4
    ncdoo's Avatar
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    The restrictor is in the block not the head. The only thing you have to worry about in the head is the rocker shaft. The 06 and up used a different one than the pre-06 models.

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