Yanmar 3YM30, Service Manual

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9. Cooling water system
172R1
(7) The pump cannot be used to drain off rain water or large amounts of flood water. The
pump can be run continuously for a period of 10 minutes. After this time it must shut off
for a period of 2 hours before reusing.
(8) Do not use the pump for showering.
If the pump outlet is deformed for showering, the increase in water pressure will
increase the load on the motor and cause motor seizure.
(9) Fix the strainer so that it will not turn upside down or on its side.
(10) When sludge has built up in the bilge to be drained, position the strainer about 20 mm
above the sludge. When the pump is stopped, be sure there is no sludge remaining
inside the pump.
(11) The specific gravity for the battery fluid is 1.25 or more.
9.7.4 Assembly procedure
When bilge is being used, assemble in accordance with the following.
(1) Assembling the bilge pump
• Select a dry place above the bilge water level.
• Select the location for the bilge pump taking into
consideration the length of the switch cable
(approx. 3 m) and its attachment point, and the
position of the battery.
• Position at a 45° angle as shown in the illustration
with the nozzle facing up, and 50-70 cm from the
bottom of the boat.
(2) Assembling the switch
• Attach in a place to insure easy operation away
from rainwater.
• Connect the terminal to the battery.
(When the cord will not reach the battery, an
extension of no greater than 3 m length suitable
for AV3cm
2
can be attached.)
(3) Positioning the strainer
• Attach at the place where the greatest amount of
water is collected when the boat is stopped.
• It is best to place the strainer as close to the bilge
pump as possible. Cut the 3 m hose to a length of
1.2 m-1.8 m and attach allowing plenty of give.
• Check the strainer during a test operation before
screwing firmly into place.
(When the strainer is screwed in, be especially
careful not to damage the bottom of the boat.)
• The strainer contains a weight, and can be used
with the weight in place.
• Always keep the strainer clean.