Tayana -48 Owner's Manual page 99

（5） Depending on the sideway speed of the bow, you must
disengage the control device shortly before the bow is in
the desired direction, as the boat will continue to move
after stopping the bow thruster.
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Maintenance
There must be oil in the oil reservoir. Refill if necessary.
Change the gear oil a minimum of every second year. Check the
gear oil quality in the gear house every time the boat is out of the
water.
Retighten the bolts holding the gear house to the motor bracket
during the first on land service with the specified bolt tightening
force. Refer to Bow thruster manual.
Keep the propeller and gear house clean from growth by
planning with anti fouling before every season.
The zinc anode, sealing and propeller shafts must
absolutely not be painted. Be careful that you do not
fill paint in the "tracks" in the gear housing the
propeller hub moves in.
Change the zinc anode before every season, or when about half
the anode is gone. Always use a sealant on the screw holding
the zinc anode to ensure that it does not fall off. Please observe
that in some water conditions it can be necessary to install an
extra zinc anode to ensure that it lasts for the period between
regular services of the boat.
As a part of the season service of your boat and before every
season, always check that：
The propeller is securely fastened.
The bolt holding the electric motor to the motor bracket are
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