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  1. S

    prop/gear ratio issue

    Hi, I've recently purchased a used Seaswirl 175 which was in need of substantial repair. We've had the engine changed (Volvo Penta 3L I/O) though the boat won't get enough speed to plane. The engine seems fine so we're assuming it is either the gearbox or (less likely) the propellor pitch. Does...
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    Gearbox ratio and prop size?

    Hi, I've recently purchased a used Seaswirl 175 which was in need of substantial repair. We've had the engine changed (Volvo Penta 3L I/O) though the boat won't get enough speed to plane. The engine seems fine so we're assuming it is either the gearbox or (less likely) the propellor pitch. Does...
  3. S

    Seaswirl 175 Gear Ratios and Prop

    Hi, I've recently purchased a used Seaswirl 175 which was in need of substantial repair. We've had the engine changed (Volvo Penta 3L I/O) though the boat won't get enough speed to plane. The engine seems fine so we're assuming it is either the gearbox or (less likely) the propellor pitch. Does...
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