MasterCraft X25 User Manual

2013 MasterCraft Owners Manual • Preparation • Page 4-16
Elevation and weather also have a very noticeable eect on the wide-open-throttle
powerofanengine.Sinceoxygengetsthinneraselevationincreases,theenginebegins
to starve for air. Humidity, barometric pressure and temperature have a noticeable eect
on the density of air since heat and humidity thin the air.
This phenomenon can become particularly apparent when an engine is propped for
use on a cool, dry day in spring and then is operated on a hot, humid day in summer, and
does not have the same performance. Although some performance can be regained
bydroppingtoalower-pitchpropeller,thebasicconditionstillexists.Thepropelleris
toolargeindiameterforthereducedpoweroutput.Anexperiencedmarinedealercan
determine how much diameter to remove from a lower-pitch propeller for specific high-
elevation locations.
MasterCraft’s engine manufacturer suggests that consumers consult with the
dealer from whom the boat was purchased regarding the best propeller for the applica-
tion in which the boat will primarily be run. However, be aware that changing the propeller
may void the warranty. Again, working with an authorized MasterCraft dealer is your best
bettoensureexcellentperformance.
Unusual Operating Conditions
If the body of water is unknown, talk to local boaters about the type of obstacles that
may be encountered beneath the water’s surface. Rocks, tree stumps and sandbars are
all dangerous and damaging. Be especially wary of rivers and man-made lakes. Rapidly
changing conditions can cause daily changes in underwater hazards.
 Staywellclearofoatingdebris.Whatlookstobeasmallbranchinthewatermay
well turn out to be an entire tree.
When traveling through weedy areas, keep an eye on the engine temperature gauge.
Weedscaughtupandblockingthewaterowthroughtherawwaterintakeortransmis-
sion cooler will cause trouble. Also, after leaving the weedy area, shift to neutral for a
few seconds and then to reverse for a few seconds to unwind any weeds that may have
wrapped around the propeller.
Docking and Tie-Up
Approach the dock slowly, with the starboard side of the boat if possible. The natural
tendency to torque steer with the rotation of the propeller at slow speeds makes docking
easier on that side. Also, use wind and current to your advantage when docking.
Before tying up the boat, be sure to use enough dock bumpers to protect the boat
fromdamage.Ifpossible,tie-upwiththebowtowardthewaves.Usegoodqualitydou-
ble-braidednylonline.Tie-uponlytothecleatsortie-downeyes.Neverusethehandrails
or ski pylon.
Boats left at docks or at anchor must be moni-
tored on a regular basis to avoid sinking.
Maintain adequate battery charge to operate
the bilge pumps to avoid excess water intru-
sion. If leaking is detected, immediately re-
move the boat from the water and determine
the cause.
If the boat is to be moored for a long period of time, use chafing protectors to protect
the gel coat finish. Leave a little slack in the lines, allowing for some wave movement or
tidal action where applicable.
If the boat is to be kept in or near water for the season, consider the purchase of a
boat lift and bottom paint for the hull. These lifts prevent the build-up of marine growth
on the hull as well as protecting the boat from damage typical of on-water storage, such
asblistering.Makesuretheboatliftsupportsthehullcorrectly.Seethenextsection,
Lifting the Boat.
NOTE: On boats that are equipped with the engine synchronizing switch (models with
two engines), this switch should be disengaged during docking or when loading and un-
loading the boat from a trailer. These maneuvers require a sensitive touch and control that
may not be realized when the switch is engaged.

MasterCraft X25 Specifications

General

Brand	MasterCraft
Model	X25
Category	Boat
Language	English