Yanmar 3YM30 Sevice Manual page 188

9. Cooling water system
(4) Attaching the delivery nozzle (outlet)
• Make a fixing hole of Ø21 or less for attaching the
nozzle. The hose attached at the nozzle should be
1.8 m or less and should reach without any strain,
therefore care should be taken in deciding on the
best position.
• Fix the nozzle (outlet) in place and attach on the
discharge side of the pump.
(5) Attaching the hose
• Attach the hose from the strainer to the pump inlet.
• Attach the delivery nozzle hose to the pump outlet.
• Make the hose as short as possible and avoid sharp bends.
(6) Test operation
• Collect water in the bottom of the boat, and check for any problems with the hose or siring. After
doing this, connect the battery.
• Turn on the pump switch, and check to see that water is being taken in and discharged properly.
The pump will stop automatically when there is no water left.
• If the inside of the pump is dry, or if the water is not being drawn up initially after a period of 10
seconds, lift the strainer above the water surface and stop the pump. Prime the pump before
starting it up again.
(7) Fixing the strainer
• After the test operation, fix the strainer into place with screws.
(Be careful not to damage the bottom of the boat with the screws.)
Fixing hole
173
21
Hose
Delivery nozzle