Propeller - Tayana -48 Owner's Manual

（2） Avoid contact with floating objects and running aground
since excessive stress may bend, fracture or initiate a
crack, which will ultimately result in a failure when least
expected
（3） Common sense usage of the throttle will help to prevent
undue stress on shafts and avoid premature failure
（4） Zinc anodes generally require replacement about once a
year. The need to replace anodes more frequently may
indicate a stray current problem within the boat or at the
slip or mooring. If zincs do not need replacing after one
year, they may not be providing protection or low grade
zinc may be the problem

2.15 Propeller

Propeller Installation
Propeller installation completes your vessel's propulsion system.
With the engine output converted to vessel movement, mating
the shaft to the propeller must be done properly to provide
maximum shaft and propeller life. If you must replace either the
propeller or the shaft, following these guidelines：
（1） Each propeller is keyed to shaft with a locating pin
extending from the key. Check that the key fits snugly in its
slot with the pin in its matching hole in the shaft key way.
（2） Check the fit of the propeller on the shaft with the key
（3） If the key does not fit, carefully file the propeller key way
using gentle and even file strokes along the hole key way
（4） Place the propeller on the shaft without the key and seat
the propeller on the shaft taper. The fit should be tight with
no wobble and no space between the shaft and forward
and after ends of the propeller hub
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