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  1. #11
    Registered berns29scarab's Avatar
    My Boats:
    99 27 Kryptonite
    Join Date
    Jul 2004
    Brick, NJ

    Re: Thinking of going to 300x motors - What is in involved?

    Quote Originally Posted by Tantrum
    Lower units are still a problem.
    Ive blown shift shaft seals multiple times and donated a brand new prop to Lake George. It appears to be a problem mainly on cats that surface the prop. If the lower units are why you are making the change It might not be worth it for you. Performance, user friendliness and resale are going to be your gains.
    WHAT HE SAID!!!!
    At 80 hours grenaded a lower july 4th 2005, bought a brand new 1 with the factory 1 year warranty, 10 hours later cracked the gear case, 40 hours later snapped a prop shaft. all on the left hand counter rotating lower, on a 30 spectre with 2003 300x's spinning 15x32 3 blades @ 62-6300 rpms with a prop shaft height of 1 5/8's above the hull. After i snapped my prop shaft and donated a prop to the lake floor, i purchased a set of 14.5 x 30's. rpms @ WOT are now 68-6900 lost about 4mph up top, lost about the same at 5000 rpms but midrange acceleration increase is awesome, easier outta the hole, and have had 20-30 hours of no breakage...KNOCK ON im gonna run these for a bit. i think the 15x32 may have just a lil too much bite for the sportmaster lowers
    Last edited by berns29scarab; 07-01-2006 at 11:42 AM. Reason: add'l info

  2. #12
    My Boats:
    30 motion ob
    Join Date
    Dec 2002
    chesapeake bay md

    Re: Thinking of going to 300x motors - What is in involved?

    4 blade props make the lowers much happier as well. I run 15x34 3blades an have not broke any shafts with the big shafts but have cracked a housing and several carrier bearings

  3. #13
    Registered racesdad's Avatar
    My Boats:
    07 368 SKATER and shes bad
    Join Date
    Mar 2002
    racing capitol of the world

    Re: Thinking of going to 300x motors - What is in involved?

    call mike anderson in st. pete for details and help
    pinellas performance outboard and machine
    727 639 0565
    he knows alot about this
    he has rigged and won with several outboard boats and has one himself. honest and a great guy
    peppers racing

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