67
6 Maintenance
Coolant replacement
Every 1000 operating hours.
51 Draining of coolant
• Remove the drain plugs from the engine
block (1) and heat exchanger (2).
• Remove the filler cap to vent the cooling
system and check that all the coolant has
been drained.
• After draining replace the drain plugs.
n
ote
Keel cooler
How the cooling system in engines with
keel cooling
should be drained depends
on the installation of the keel cooler.
Refer to the keel cooler manufacturer’s in-
structions for this.
Check using a coolant hydrometer wheth-
er the coolant is providing sufficient pro-
tection against freezing if total draining off
is not possible.
14
13
1
2
VD01018
VD01025