Supra SL Owner's Manual page 58

The ski platform is attached to the boat with detachable
brackets. The platform may be removed from the boat by 1.
Set platform on bracket. 2. Locate lower pin. 3. Locate locking
pin through brackets. 4. Swing locking arm over end of pin.
Propeller
©2017 Skier's Choice, Inc.
The product development team at Skier's Choice has carefully
explored and tested many different propellers for use on our boats.
All tests indicate that the current propeller installed on your model is
the best for the variety of boating performance required.
It is strongly recommended that your Supra dealer be notified before
changing the propeller. In general, changing to a lower pitched
propeller may increase acceleration, but will decrease top speed.
Changing to a higher pitched propeller may achieve higher top speed
with a light load, while acceleration and power may decrease.
Avoid engine damage. Do not exceed the maximum RPM as listed
for your motor. Some props may allow the engine to over rev,
which can cause non-warrantable engine damage.
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