10
PROPELLER USE
The MAX PROP
®
WHISPER propeller works completely automatically. It takes the pitch
when the drive shaft is rotated to travel forward or backwards (WARNING: reversing
the rotation when the number of revolutions is too high is definitely inadvisable). The
propeller feathers when engine is off, starting from the position to travel forward,
with the propeller shaft locked.
In order to feather the propeller, operate as follows:
• Drive the boat to travel forward.
• Turn off the engine without disengaging the forward gear, and lock the drive shaft.
DO NOT turn off the engine while traveling backwards, as in this case the blades will
be in the backwards motion position and will not feather. You can actually use this
method to rotate the shaft when the latter is connected to a generator.
IMPORTANT WARNINGS
Carefully follow the following instructions:
• Before reversing motion, allow the decrease of the number of revolutions of the
engine, and then reverse.
• Verify that the propeller body is full of very fluid marine grease.
• The backwards motion must always be engaged starting from the forward motion
position, and through the neutral position, to avoid the thrust direction of the
propeller to be reversed.
• Protect the propeller against galvanic corrosion by applying a sufficient mass of zinc.
Replace the zinc anodes every year even if they have not corroded and check that
there is good electrical contact between the zinc, the propeller and the shaft (the
contact surfaces between the zinc and the bronze must be cleaned with abrasive
cloth).
