• Creator
    Topic
  • #21133

    Larry Backman
    Participant
    Vessel Name: Skipjack
    Engines: QSM 670
    Location: Cape Cod, MA
    Country: US

    I’m at 300 hours on my engine and transmission this year, on my way to 5-600 hours.

    What’s the frequency of change on the 310? Not having luck with ZF manuals on line.

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  • #21189

    Tony Athens
    Moderator
    Vessel Name: Local Banks
    Engines: QSB 6.7 550 HP
    Location: Oxnard, CA
    Country: USA

    All the same….The 311 is also an older “no more made” but good ol’ ZF gear..

    Tony

    #21159

    Larry Backman
    Participant
    Vessel Name: Skipjack
    Engines: QSM 670
    Location: Cape Cod, MA
    Country: US

    Ha, it is a new 311, not a 310!

    Sorry for THe misinformation . I replaced. 310 with a 311 last year.

    #21147

    Tony Athens
    Moderator
    Vessel Name: Local Banks
    Engines: QSB 6.7 550 HP
    Location: Oxnard, CA
    Country: USA

    Larry,

    You have a very early gear, but per ZF on all of their post 2000 year gears in this general size range say 500 hrs or once a year.. Use that as guidance…………If you wanted a IMO, I’d say 2-3 years or 1000 hours as oils are just so much better than they used to be…… ……………Your call..

    Tony

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