27
After operation
1.
Let the engine idle for a few minutes with the
reverse gear in neutral after landing. This will
even out the engine temperature and prevent
local overheating which may cause the coolant
to boil.
2. Turn the key to stop position “S”. Release the
key when the engine has stopped (key will
spring back automatically into the 0 position).
The key can then be taken out.
Safety measures:
3. Close the cooling water intake sea cock and
the fuel cocks. For antifreeze protection, see
“Coolant” on page 20. See also under the
heading “Action when there is a risk of freez-
ing” on the next page.
4. Switch off the main switches if the boat is not to
be used for some time.
5. Inspect the engine and engine compartment for
any leaks.
Propeller shaft brake
Under certain operating conditions, the propeller may
make the propeller shaft rotate when the engine is
stopped. This rotation may damage the reverse gear
since its oil pump, which is driven by the integral
shaft, stops when the engine stops.
The propeller shaft can be permitted to rotate with
the engine stopped for up to 6–8 hours. After this
time the engine must be started for at least 5 minutes
to ensure the reverse gear is lubricated and cooled.
If the shaft is likely to rotate more quickly than during
normal operation, e.g. during sailing, a temperature
gauge should be fitted which monitors the tempera-
ture of the oil.
The max. permitted temperatures are 110°C (230°F)
for Twin Disc and 95°C (203°F) for MPM reverse
gears.
If the above conditions cannot be met a brake must
be installed. A temporary solution is to lock the pro-
peller shaft flange mechanically instead.
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