Yanmar 6LPA-STP2 Service Manual page 227

Components Related to Cooling System
12/05
Seacock (Optional)
1. The seacock located on the bottom of the hull
allows engine cooling seawater to be pumped
from the sea to the engine. The seacock has a
scoop strainer that prevents debris and foreign
matter from being pulled into the cooling
system.
Figure 7-22
( 4 )
( 3 )
( 2 )
( 1 )
Figure 7-22
1 – Screw
2 – Seacock strainer
3 – Vessel Body
4 – Air Intake Pipe
5 – Seacock
NOTICE: The seacock should be closed after
daily operation and opened before operation. If
the seacock is open when the boat is not
operating and a leak occurs in the seawater
system, water will leak into the boat. If the boat
is operated with the seacock closed, no
seawater is fed to the engine and pump and will
cause engine overheating or failure.
6LPA Service Manual
2. Inspect seawater delivery periodically. If the
delivery level has dropped, check the seawater
pump. If it is normal, lift the boat above the
seawater and check the seacock for clogging. If
seawater is leaking from the seacock, remove
the seacock and check for wear. If so, repair or
replace the seacock.
( 5 )
0005350
© 2007 Yanmar Marine International
COOLING SYSTEM
7-15