2013 MasterCraft Owners Manual • Care and Maintenance • Page 5-19
Before Each Use 
(Prior to Starting the Engine)
 ReviewtheSafety Checks and Services section of this Owner’s Manual. There are 
important functions that must be followed before, during and after every outing, without 
fail! The Safety Checks and Services notes that all drain plugs must be reinstalled prior to 
operating the boat!
Inspect 
Seacock 
Strainer
  Because a 
clogged seacock 
strainer puts 
undue strain on the 
engine(s), the strainer should be checked prior to starting the boat. Boats with closed cool-
ing systems are not equipped with this. The seacock strainer is standard on all boats.
Step 1:  Removetheplasticnutontopofthestrainer.Liftthecover.
Step 2:  Removethelterandinspectfordebris.Manuallycleanthestrainer.
Step 3: Returnthelterinplaceandrecover.Tightenthenut,butdonotover-tightenasit
may eventually strip the threads holding the nut in place.
Inspect the Battery Connections and Hold-Downs
Because poor connections or hold-downs may result in erroneous voltmeter readings, 
MasterCraft recommends doing this before starting the boat.
Step 1:   Ensure the engine is OFF and the engine safety starting switch disconnected. 
Be certain that the throttle/shif control lever is in neutral. Locatethe
battery.Batteriesareplacedinavarietyoflocations,dependingonthemodel.
Check under the observer seat or behind the rear seat.
Step 2: Check that the battery post connections are clean and tight. If not:
• Loosenandremovethenegativeterminalconnectionrst.Becarefulnottotouchthe
positive terminal with the wrench.
• Loosenandremovethepositiveterminalconnection.
• Removethebatteryhold-downsandremovethebatteryfromtheboat.