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Thread: Drilling Holes in the prop

  1. 11-10-2003, 11:13 AM #1
    jackpunx
    What does this do?.. I have a 28 that I got with the boat.. it has holes in it.. when I added the blower.. I changed my gears and went with a 30.. its new.. has no holes?.. what is the purpose of the holes?
    thanks
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  2. 11-10-2003, 12:37 PM #2
    OLDRAT
    Three or so holes in the hub behind the blade?
    If so, it is for ventilation to allow slippage (& increase engine
    RPM) for a quicker hole shot, but allows you to retain the
    prop's max pitch for top-end and cruising.
    Some merc props come with various size bushings to allow
    custom tayloring of the slippage. You can also epoxy fill them
    to reduce slippage.
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  3. 11-10-2003, 01:11 PM #3
    HP350SC
    It won't matter with your thru hull exhaust.
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  4. 11-10-2003, 01:15 PM #4
    jackpunx
    cool,
    thanks for the replies
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