Oil Level; Hydrolock - Marine Power 4.3 VORTEC MPI Owner's Manual

7.
Precautions

Oil Level

Check the oil level before each engine start up and
every eight (8) hours of continuous operation. It should
be understood that internal combustion engines will
use a certain amount of oil during operation as a
cooling and lubricating agent (especially during break-
in period). Oil consumption should decrease after
approximately 100 hours of operation.
IMPORTANT: The space between the "FULL" and
"ADD" marks on the dipstick represent one quart. It is
not necessary to add oil unless the level is at or below
the "ADD" mark.
Engine dipstick level may change due to the angle of
installation. Ensure that "high" oil level is properly
marked accordingly.
When adding crankcase oil, DO NOT OVERFILL.
If crankcase is overfilled, it will cause foaming or aer-
ation of oil in the oil pan. This will effect oil pressure
which may result in severe internal engine damage.
16

Hydrolock

Hydrolock describes a condition in which water enters
the cylinder of an engine. Water is not compressible
and can cause catastrophic damage. Do not try to
start an engine that shows sign of having water in the
cylinders. Beware of these situations:
1. Following Wakes: Sudden slow-downs may cause
the boat wake to flow over the transom of your
boat.
2. Engine Shutdown: Sudden engine shutdown while
the boat is moving may force water into the exhaust
system.
3. Improper Installation: Refer to Section 12: Exhaust
Piping. An exhaust system without flappers and the
specified incline increases the likelihood of water
entering the engine.
4. Improper Hoisting: Operators are sometimes tempt-
ed to reduce hoisting time for propeller changes
by hoisting only the boat stern. Such hoisting can
cause residual water in the exhaust system to enter
engine cylinders. Water entering engine cylinders
will cause the engine to lock because water does
not compress.
5. Poor engine cover design: Engines are supposed
to be protected from top side water. If the engine
hatch (cover) allows water to spill on to the top of
the engine, water may enter the cylinders through
the flame arrestor.
6. Belt Slinging: Too much water in the bilge of a boat
will sometimes be picked up by the crankshaft
pulley and carried into the flame arrestor during a
hard acceleration maneuverer.
To remove water from engine cylinders, take the follow-
ing steps:
1. Remove all spark plugs.
2. Remove coil wire.
3. Crank engine for 15 seconds.
4. If there are any abnormal sounds STOP ENGINE
immediately and contact your MARINE POWER
dealer.
5. Change engine oil & filters.
6. Replace spark plugs and reattach coil wire.
7. Start engine. If there are any abnormal sounds
STOP ENGINE immediately and contact your
MARINE POWER dealer.
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