Check The Wiring Connectors; Tighten All Major Nuts And Bolts; Check Or Replace Flexible Engine Mounts; Drain, Flush, And Refill The Engine Coolant - Yanmar 6SY Series Operation Manual

11. Install connection pipe between intake
manifolds.
12. Connect coolant hoses to charge air
coolers.
13. Install and secure all remaining air
inlet pipes and hoses. Tighten
'V'-clamps to:
• M6 Screw - 8 N·m (71 in.-lb)
• M8 Screw - 20 N·m (177 in.-lb)
14. Fill the system with coolant. See Drain,
Flush, and Refill the Engine
Coolant on page 97.
15. Start the engine and check for coolant
leaks. Check the level of the coolant
and fill as necessary.

Check the Wiring Connectors

See your authorized Yanmar marine dealer
or distributor.
Tighten All Major Nuts and
Bolts
See your authorized Yanmar marine dealer
or distributor.
Check or Replace Flexible
Engine Mounts
See your authorized Yanmar marine dealer
or distributor.
Drain, Flush, and Refill the
Engine Coolant
Cooling performance drops when coolant
is contaminated with rust and scale. The
coolant must be replaced periodically
because its properties deteriorate over
time.
6SY Operation Manual
PERIODIC MAINTENANCE
A
DANGER
SCALD HAZARD!
• NEVER remove the coolant
filler cap if the engine is hot.
Steam and hot engine coolant
will escape and seriously burn
you. Allow the engine to cool
sufficiently before attempting
to remove the filler cap.
• Securely tighten the filler cap
after checking the coolant
level. Steam can escape during
engine operation if the cap is
loose.
• Failure to comply will result in
death or serious injury.
A
WARNING
BURN HAZARD!
• Wait until the engine cools
before draining seawater from
the cooling system. Hot
seawater may splash and burn
you.
• Failure to comply could result
in death or serious injury.
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