300HP merc Varados snapping gearboxes

Discussion in 'All Things Boats & Boating' started by Frosty, Jan 20, 2011.

  1. Frosty

    Frosty Previous Member

    Ferry 40ft,-- 4 x300 mercs Verado, open deck seats approx 40 people strapped in. 1600 liters fuel. 60 mile trip open sea.

    cruise RPM 4400 RPM limiter set 6200.

    Counter rotation gearboxes 4 now in 500 hours, warranty now out.

    Reasons for failure unkown yet eys witness says gearbox housing cracked open.

    I suggested cutting rev limiter to 4400 sychronise electric throttles and check electric gear selection.

    I cant think of much else.
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