2007 MasterCraft Owners Manual - Page 17-2
Running the engine with the flame arrestor removed increases the possibility of fire or explosion if the engine should
backfire and gasoline fumes are present. If the engine is operated without the flame arrestor secured, extreme care
must be taken to ensure that the engine compartment is well-ventilated and that no fuel leaks are present.
Step 4:
Carefully loosen the fl ame arrestor and lift it far enough to insert the tube of the fogging oil can. Spray four
to six (4 to 6) ounces of oil into the throat of the carburetor or throttle body. Shut off the engine. Re-attach the
fl ame arrestor and seal with low-tack tape.
Step 5:
Perform the annual maintenance as described in the previous chapter.
Step 6:
Loosen all accessory drive belts and check their condition.
All Engines
Step 1:
Drain water from the exhaust manifolds. Uncouple 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 hos-
es.
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 atten-
tion to the impeller during use. At any sign of wear,
replace it. If you have used a single impeller through-
out 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! Fail-
ure 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 fi llings on both
sides of the engine to drain water from the block.
Summary of Contents for 2007 MariStar
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