Then the motor does not have to tilt as much. The axis of these reverse gears is rotated by 7 degrees. L 2:1 therefore means: a two-to-one left-hand reverse gear for a left-handed propeller. Often the direction of rotation is indicated with L or R. This ratio means: Two engine revs / one propeller shaft rev (or simply half). The ratio is often given as engine speed divided by the output speed, e.g. The Velvet, PRM, Hurth, ZF and Twindisc reverse gears are well known common types. A homokinetic drive solves the problem in a different way. The maximum tilt can often be found in the manual. Especially with a saildrive, you are often bound to prefabricated through-hulls.Īlso check whether the inboard engine can handle the maximum tilt when sailing. Therefore, please check in advance what is possible. In a polyester ship, this is more difficult. In case of a steel ship its foundation can be adjusted. On some inboard engines, adjusting the existing engine mounts is not a problem. Are the reverse clutch output and the crankshaft at the same height? If the reverse clutch output is lower than the existing propeller shaft, the engine will ‘rise’. In any case, consider what you will need.įirst check if the engine matches the propeller shaft height.
For recent engine types, you often know the installation dimensions or they are easy to find.
Then you can replace an engine with minimal adjustments.
INBOARD BOAT MOTOR INSTALL
Are you going to install or re-install an inboard engine yourself? Then prepare yourself well, start with the basics and start measuring.
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