The port engine will have an RPM blip after the Synch switch is activated
and the throttle is moved to wide-open throttle on the MariStar 280, X-80
and CSX 265. If the engine actually accelerates to wide-open throttle, then
the Synch function did not take control of the port engine. In this instance,
reduce the speed and return to Step 1.
The engines can be run at different levels of throttle BUT NOT WHEN UTI-
LIZING THE SYNCH FUNCTION!
NOTE: DO NOT engage the Engine Synchronizing Switch when loading
or unloading the boat from a trailer OR when docking. These maneuvers
require a sensitive touch.
MariStar 280, X-80
Note: The MariStar 280 is equipped with a four-lever control. (See above
image.)
Step 1: Start both engines. While at idle and in neutral (shifter not
moved), press up on the Synch switch to turn the synchro-
nization function ON.
Step 2: Push the port throttle to wide-open throttle. There will
be a slight rise in RPMs to the engine (but the boat should
not move forward as the shifting and throttle response are
controlled with separate levers). With the Synch switch
ON, however, the engine will very quickly return to idle.
Step 3: Using the starboard throttle, run the boat up to the desired
speed. At this point, the system will begin functioning with both
engines in synch. The starboard throttle will control the speed
for both engines as long as the synch switch is ON.
Note: Before disengaging the synch functionality, move ALL le-
vers back to idle, beginning with the starboard throttle and shifter,
and then the port throttle and shifter. When the boat returns to idle,
the engine synchronizing switch can be turned off. Failure to follow
this procedure may result in erratic handling of the boat, which may
be beyond the boat operator’s ability to handle.
CSX 265
The CSX 265 is equipped with a two-lever control. See above image.)
Step 1: Start both engines. While at idle, press up on the Synch
switch to turn the synchronization function ON.
Step 2: Push the port throttle to wide-open throttle. There will be
a slight rise in RPMs to the engine, which will cause the boat
to move forward. (This occurs because the shifting
and throttle response are controlled with the same
lever.) With the Synch switch ON, however, the engine will
very quickly return to idle, but the port engine remains in
forward gear.
Step 3: Using the starboard throttle, run the boat up to the desired
speed. At this point, the system will begin functioning with both
engines in synch. The starboard throttle will control the speed
for both engines as long as the synch switch is ON.
Note: Before disengaging the synch functionality, move ALL
levers back to idle, beginning with the starboard throttle and
shifter, and then the port throttle and shifter. When the boat
returns to idle, the engine synchronizing switch can be turned
off. Failure to follow this procedure may result in erratic han-
dling of the boat, which may be beyond the boat operator’s
ability to handle.
Fuel Gauge
(All Models)
Fuel gauge readings are only approxi-
mate. This gauge is activated with the igni-
tion switch. The rocking motion of the boat
during normal operation will cause the fuel
gaugetouctuate.Foramoreaccurateread-
ing, make sure that the boat is level and there
is little or no motion present.
MasterCraft recommends that operators do not run the boat
below a quarter of a tank, except as necessary to return to shore,
and not until the boat has been operated enough times to develop
an understanding of how the fuel gauge readings relate to the visual
inspection of fuel left in the tank. Extending fuel usage beyond the
known capability of the boat may cause the boat to run out of fuel and
may leave you stranded off-shore.
Although it may be possible to see fuel in the bottom of the fuel
mastercraft 2010 ow n e r ’s m anual • page 5-5
Port engine shifter
Port engine throttle
Starboard engine throttle
Starboard engine shifter
MariStar 280, X-80
Port engine
combined
shifter/
throttle
Starboard
engine
combined
shifter/
throttle
CSX 265
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