Yanmar 1GM User Manual page 70

64
NOTE
In some instances. such as to prevent rust
formation. it may be desirable to j ill the sea-
water coo ling system with an antifreeze so-
lution. Ref er to the fo llowing section in this
chapter.
7. If the seawater cooling system was dra ined, remove
the seawater pump impe ller as described in Chapter Eight .
Lubricate the impeller with dish washing soap. then install
the im pell er in the pump housing. Assemble the pwnp. but
do not lighten the co ver retaining screws.
NOTE
Make a highly visible sign as a reminder
that the sea water pump is inope rable. At-
tach the sign to the controls.
8. Apply lubricant to the control cables and all linkage
pivot points.
9. Loosen belt tension for the pump and alterna tor drive
belts .
10. Seal o r cover all engine openings to prevent the en-
trance of water, d in or debris. Make a list of all the sealed
locat ions to be sure they
are
all uncovered when returning
the engine to service.
II .
Wipe any din or corrosion off the engine and trans-
m ission, the n use a rag to apply oil or a rust inhi bitor to all
engi ne surfaces.
12. Fill the fue l tan k so less conde nsation will fonn. Add
a good-quality antibacteria l add itive (biocide) and fuei
sta bilizer to the fuel tank .
i3 . Remove the battery from the boat . Tape the vent ho les
clo sed and clean the battery case with a baking soda so lu-
tion to rem ove any traces of corrosion and acid, then rinse
wit h co ld water. Chec k th e e lectrolyt e level in each cell
and top o lTw ith dist illed water as required. Cover the ter -
m inals with a light coat of petr oleum jelly. Sto re the bat -
tery in a cool, dry place.
NOTE
Remove the battery from storage every
30-45 days. Check electrolyte level and
slo
w-charge f or five or six hours at 6 am~
peres.
COO U :' I i G SYSTEM DRAIl'lI:'liG
Th e engi ne sea water cooling sys tem must be prope rly
dra ined for stora ge during the winter months in areas
where temperatures fall below 32° F (0 ° C). If it is not, the
en gine block or coo ling sys tem may be cracked by the ex-
pansion of froz en water.
CHAPTER FOUR
The follow ing procedures are designed to help prevent
unn ecessary engine damage du ring w inter storage .
To ens ure that the coo ling system is com plete ly
dra ined, it may be necessary to readj ust the pos ition of the
eng ine to drai n all water.
It
is possible that some wat er will remain in the sys tem.
Filling it with an antifreeze so lution w ill protect the sea-
water cooling sys tem.
Seaw at er
C ooling Sys te m
I. Place a suitable conta iner und er each drain, if space
pennits. Th is will preven t water from dra inin g into the
bilge .
NOTE
if
no water flows from a drain, check the
drain to make sure it is not obstructed or
pl ugged.