Specifications

INSPECT THE THROTTLE AND
SHIFT CABLES FOR KINKS, WEAR
AND INTERFERENCE (RPT-1 ONLY)
Because this process should be completed while
the engine is cool and cannot cause burns to your
skin, we recommend you do this before starting
your boat.
Step 1: Ensure the engine is OFF and the engine
safety starting switch disconnected. Be certain that
the throttle/shift control lever is in neutral.
Step 2: Open the engine compartment and locate
the throttle and shift cables. Follow each cable back
under the floorboards and feel for any kinks and wear
on the outer jacket. Any sign of cable damage is cause
for replacement. See your MasterCraft dealer.
BEFORE EACH USE
(if the engine has shown evidence of overheating during the previous outing or if overheating occurs during an
outing, checking the impeller is imperative!)
CHECK THE IMPELLER
Because this process should be completed while the engine is cool and cannot cause
burns to your skin, we recommend you do this before starting your boat. If checking
during an outing, allow the engine to cool some before checking and be very careful to
avoid burns from contact with hot engine parts.
Step 1: Ensure the engine is OFF and the engine safety starting switch disconnected. Be
certain that the throttle/shift control lever is in neutral. Open the engine compartment and
locate the raw water impeller housing.
Step 2: Disconnect the intake and outflow hoses on the raw water impeller housing to check
for debris. Reconnect.
Step 3: Remove the screws on the impeller cover and very carefully break the gasket seal.
Because a good seal is very important to avoid potentially serious leaks while the engine is in
operation, it is advisable to have some new gaskets in the boat’s glovebox for such occasions. If
even a slight gap exists, you may experience problems in the future, so replacing the gasket is a
better idea than taking any chances with an old one. Also, leaving any portion of the old gasket on
the housing or cover can impede good contact.
Ignoring elevated temperatures on a temperature gauge or any other
evidence of the engine operating at temperatures above recommended levels
can result in serious damage to the engine. Any resulting damage will not be
covered by, and may void, your warranty!
Step 4: Inspect the inside of the impeller housing. The paddle-wheel should appear as it
does in this photograph. If any rubber extrusions on the end of the arm appear frayed or
worn, it should be replaced. If there is not a slight bend to the paddle-wheel arms, replace
it. Debris entering the impeller inevitably will damage it; but it serves its purpose in keeping
debris out of much more expensive internal engine parts.
2006 MasterCraft Owners Manual–Page 15-4