Unscheduled Maintenance
2007 MasterCraft Owners Manual - Page 18-1
Propeller damage is caused by striking solid objects. If the propeller is not rotating at the time it strikes a solid
object, the damage is usually confi ned to just one blade and may be diffi cult to see. If the propeller is rotating when it
strikes an object, usually the resulting damage can easily be seen on all blades.
Checking/Repairing Propellers
Step 1:
Ensure the engine is OFF and the engine safety starting switch disconnected. Place the throttle/shift control
lever in forward gear.
Step 2:
Clamp a small rule scale to the shaft strut, parallel to the shaft so that the end of the scale is 3/32-inches from
the leading edge of a propeller blade.
Step 3:
Rotate the propeller slowly. There should be no more than 3/32-inch variance between the blades. If the pro-
peller is damaged, see your MasterCraft dealer.
Changing Propellers
Step 1:
Ensure the engine is OFF and the engine
safety starting switch disconnected. Place
the throttle/shift control lever in forward
gear.
Step 2:
Remove and discard the cotter pin.
Step 3:
Remove the propeller nut.
Step 4:
Tap the center hub of the propeller with a
rubber mallet to release the propeller. In-
spect the shaft and propeller splines for
damage.
Step 5:
Thoroughly clean and apply a light coat of
waterproof marine multi-purpose grease to
the splined area of the shaft and propeller.
Step 6:
Align the splines and carefully install the propeller onto the shaft. DO NOT FORCE IN PLACE.
Step 7:
Install the propeller nut and torque to 50-ft-lbs.
Step 8:
Install a new cotter pin and bend the ends around the shaft to lock the propeller on the shaft.
Checking Speedometer Calibration
For tournament use and practice, accurate speedometer readings are a must. To calibrate the speedometer
you need an accurately measured course of 850 feet and a certifi ed stopwatch accurate to a thousandth of a second.
To calibrate the AWSA offi cial-tournament rules:
Step 1: Approach the course at an indicated 36 miles per hour (MPH). Hold the speed steady and have an observer
check the course time with a stopwatch.
Step 2: If the course time is between 15.88 and 16.28 seconds, no adjustment is necessary. If the course time is not
within tolerance, the adjustment switch is on the lower right panel of the dash on the ProStar 190 and 197.
Summary of Contents for 2007 MariStar
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