Westerbeke 6.5KW Technical Manual page 105

Sea Water Circuit
Close the thru-hull seacock. Remove the sea water intake hose from the seacock. Place the end of this hose
into a 5-gallon bucket of clean fresh water. Before starting the engine, check the zinc anode found in the
primary heat exchanger on the engine and clean or replace it as required. Clean the sea strainer, if one is
installed in the inside of the hull.
Start the engine and allow the sea water pump to draw fresh water through the system. When the bucket is
empty, stop the engine and refill the bucket with an antifreeze solution slightly stronger than needed for winter
freeze protection in your area.
Start the engine and allow all of this mixture to be drawn through the sea water system. Once the bucket is
empty, stop the engine. This antifreeze mixture should protect the sea water circuit from freezing during the
winter lay-up, as well as providing corrosion protection.
Remove the impeller from your sea water pump (some antifreeze mixture will accompany it, so catch it in a
bucket). Examine the impeller. Acquire a replacement, if needed, and a cover gasket. Do not replace the
impeller (into the pump) until recommissioning, but replace the cover and gasket.
Intake Manifold and Through-Hull Exhaust
Place a clean cloth, lightly soaked in lubricating oil, around the air arrester. Be sure to remove this cloth
before recommissioning. Make a note to remove the cloth prior to start-up. The through-hull exhaust part
can be blocked in the same manner.
Starter Motor
Lubrication and cleaning of the starter drive pinion is advisable, if access to the starter permits its easy
removal. Ensure that the battery connections are shut off before attempting to remove the starter. Take care
in properly replacing any electrical connections removed from the starter.
Cylinder Lubrication
Fogging the engine should be done as the last of the anitfreeze mixture is drawn into the sea water circuit.
Remove the air intake screen (the air
filter~~
spray Marvel Mystery Oil or another commercially available
fogging oil into the carburetor while the engine is running. Spray enough oil to stall the engine. This will coat
the walls of the cylinders, pistons, and valve surfaces with this protective oil. Remove the spark plugs and
spray a small amount of this oil into each spark plug hole and turn the engine over two or three complete
revolutions by hand. Reinstall, but do not tighten, the spark plugs, as these will need to be cleaned and
gapped prior to recommissioning. Close off the carburetor's air filter with an oily rag.
Spares
Lay-up time provides a good opportunity to inspect the equipment to see if external items such as drive belts
or coolant hoses need replacement. Check your basic spares kit and order items not on hand, or replace
those items used during the lay-up, such as filters and zinc anodes.
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