Pearson P31-II, Manual

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Place transmission shift lever in neutral (center
position).
Let engine idle for one (1) minute to allow it to cool
down.
Pull stop cable out until the engine stops.
Push stop cable in.
Turn the key to the 11OFF" position.
CAUTION! DO NOT SWITCH BATTERY SELECTOR UNTIL THE ENGINE
HAS COME TO A COMPLETE STOP! THIS WILL PREVENT ALTERNATOR
AND REGULATOR DAMAGE.
CAUTION! DO NOT USE DECOMPRESSION LEVER TO STOP ENGINE.
THIS COULD SERIOUSLY DAMAGE EXHAUST VALVES.
CAUTION! IF YOU CLOSE THE FUEL AND SEA WATER VALVES AFTER
STOPPING THE ENGINE, BE SURE TO RE-OPEN THEM BEFORE
RESTARTING. FAILURE TO DO SO COULD CAUSE ENGINE TO OVER-
HEAT AND CAUSE DAMAGE TO THE PUMP IMPELLER OR CAUSE FUEL
LINES TO BECOME AIR LOCKED.
4.3 DIESEL.. .MAINTENANCE
Whether maintenance of the power system is to be per~ormed
by the owner or delegated to a mechanic, it is the owner
who must first initiate any action that is to take place~
He must either perform the maintenance 6r decide to call
someone to do the job, and a working knowledge of the power
system is essential in the first case, and desirable in the
second. The engine manual is, of course, the prime source
for engine information and should be consulted, preferrably
before the fact. The following paragraphs are included as
a supplement to cover any required maintenance procedures
that are not a part of the engine manual.
4.3.1 Fuel Sanitation
The fact that a diesel engine does not require an ignition
system can, and usually does, result in an engine that is
far superior to a gasoline engine in regards to dependabil-
ity. Whether this is actually the case depends greatly on
the cleanliness of the fuel that is supplied to the engine
since the close tolerances required by the engine's fuel
delivery system make it extremely intolerant of any form of
dirt or water contamination. The engine is supplied with
primary or secondary filters that prevent contaminants from
reaching the engine where they could cause damage, but a
clogged filter, although providing this protection, can
also stop an engine. Keeping the filters free of dirt and
water is an obvious answer to this problem, and the clean-
ing schedules set forth in the engine manual will in most
cases keep filters clean enough to prevent stoppage.