Checking Of The Engine - O.S. engine max-21RG-M Owner's Instruction Manual

3
At the end of each operating session, drain out any
fuel that may remain in the fuel tank. Afterwards,
energize the glowplug and try to restart the engine,
to burn off any fuel that may remain inside the en-
gine. Repeat this procedure until the engine fails to
fire. Leaving fuel residues within the engine can
result in difficult starting after a period of storage. It
may also cause corrosion. To reduce such risks, it
is helpful to inject some corrosion inhibiting oil into
the engine's air intake. Rotate the engine many
times to distribute the oil to all the working parts.
4
Drain the water remaining in the water cooling
head, and wash out with methanol, then inject cor-
rosion-inhibiting or moisture-displacing oil.
5
When cleaning the exterior of the engine, use me-
thanol or kerosene. Do not use gasoline or any
solvent that might damage the silicone fuel tubing
or any plastic parts of the boat hull.
6
When the engine is not in use remove the glow-
plug and rinse out the interior with kerosene (not
gasoline), by rotating the crankshaft. Shake out re-
sidue, then inject light machine-oil through the plug
hole again rotating the shaft to distribute the pro-
tective oil to all working parts.
7
In the event of water having entered the cylinder,
crankcase, etc., refer to the procedures recom-
mended in the footnote to "running-in" section.
8
Avoid unnecessary disassembly of your engine.

CHECKING OF THE ENGINE

After a long use, the engine will not develop the
standard performance due to wear of parts.
suggested to replace the parts, such as ball bearings,
connecting rod, cylinder & piston assembly and
crankcase, as necessary after checking when the
following symptoms are found.
Idling gets unstable and/or the engine stops at
idling.
Engine sound changes and the engine tends to
overheat.
Power drops extremely.
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It is