MAINTENANCE INSTRUCTIONS
For Indefinite Period
Drain crankcase completely and refill with M-4834-A, Engine Preservative Oil (S.A.E. 10), or equivalent.
Run engine until completely out of gasoline, then restart and run on M-534-H or equivalent unleaded, undyed
gasoline for at least 10 minutes.
While engine is still running and at completion of above run, treat upper cylinders by spraying NM-4834-A into
carburetor air intake for about two minutes. Open throttle for short burst of speed, shut off ignition and allow engine to
come to a stop while continuing to spray M-4834-A into air intake.
Drain oil and gasoline. Drain water at the bottom of radiator and also left rear side of cylinder block.
Disconnect and remove battery.
Remove grease and oil from exterior surface of engine. Leave spark plugs in holes or seal spark plug holes with
suitable threaded metal plugs.
Seal all openings in engine and accessories with M-6471, Nonhydroscopic Adhesive Tape, or equivalent. Mask off
all areas to be used for electrical contact.
Make sure all surfaces are dry, then spray all taped openings, all engine accessories including ignition wiring, and
all exterior surfaces of engine with M-4858-B, Insulation Compound, or equivalent.
If engines are equipped with automotive type clutch, block clutch in slightly disengaged position so that lining and
pressure plate are not in contact.
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