Specifications

2006 MasterCraft Owners Manual–Page 17-2
Step 6: Loosen all accessory drive belts and check their
condition.
ALL ENGINES
Step 1: Drain water from the exhaust manifolds. Un-
couple the hose quick-disconnect and drain the manifolds.
A small brass screw-in plug located on the manifolds must
also be removed. The engine manufacturer recommends
leaving the drain plugs out or the hose uncoupled until the
boat is placed back in service.
Step 2: Remove both hoses from the raw water pump on
the front of the engine. Drain any remaining water from
the hoses.
Step 3: Remove the raw water pump impeller from the
pump housing. If the impeller shows any signs of damage
or wear, discard it. If it can be re-used, lubricate the impeller
with Vasoline or soap and seal in an airtight bag.
Note: It is extremely important to pay attention to the
impeller during use. At any sign of wear, replace it. If you
have used a single impeller throughout the season, replace
it. Be certain that when the boat is placed in service the
following season that you have an
impeller in the raw water pump!
Failure to follow these guidelines
may result in nullifying your
warranty!
Step 4: Remove the hose from
the lower end of the transmission
cooler. Inspect the cooler for any
debris such as weeds, plastic
pieces, etc.
RAW WATER-COOLED ENGINES
Step 1: Remove the drain plug on the port side and knock
sensor from the starboard side of the engine to allow for
the remainder of the water draining function.
Notice: Some 5.7 Liter engines have a knock sensor
located in the drain location. The knock sensor must be
carefully removed to drain that side of the block. Also,
on the 8.1 Liter engine, removing the knock sensor does
NOT drain the block. Remove
the plugs from the brass
fillings on both sides of the
engine to drain water from
the block.
Note: Placing the drain plugs
in a plastic bag and attaching it
to the steering wheel of the
boat will act as a reminder to
reinstall the drain plugs during
recommissioning in the spring.
Step 2: Use a short piece of
stiff wire to dislodge any rust or
scale that may be around the
drain hole.
Step 3: Disconnect the large
diameter hose that runs from
the water circulating pump to
the thermostat housing.
Make sure all of the water drains from the hose.
FRESH WATER-COOLED ENGINES
Step 1: Remove the raw-water inlet and outlet hoses from
the intake side of the heat exchanger.
Step 2: Check the level of the coolant on the fresh water
side of the heat exchanger. Use the anti-freeze tester to
test the strength of the mixture.
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