Hallberg-Rassy HR 310, Instruction Book

Page: 7 / 61

7
The engine
There are unprotected rotating parts and belts in the engine compartment.
Make sure the engine controls are at ”STOP” position before commencing
any work on the engine to minimise the risk of injury.
The engine manufacturer manual is found at the end of this book.
Engine break-in and running:
More engines are damaged by slow running and by rust caused from poor winterising at lay up than
overloading or due to many operating hours.
There is no reason to be over-cautious during the running in period. All revs between 1800 and 2600
RPM are acceptable. You can use both lower and higher RPM when called upon by the conditions but
avoid running at full speed for longer periods (more than ½ hour).
A new engine will consume more oil than normal. Be especially careful with the oil level controls during
the break-in period.
The freshwater / antifreeze coolant level in engines with dual cooling will rise and fall depending on
the temperature. This is normal.
A good routine, especially during the break-in period but also later, is to check the engine compartment
for unnatural soiling. A leak of water, oil or other can then easily be detected. An alternator belt that
isn’t properly tensioned or has started to line up, will always spread a layer of black dust before it finally
breaks.
Engines in pleasure boats are seldom worn out - they rust away. Especially if you don’t take care of the
engine.
Sea water intake
HR 310, 342, 372 and HR 412 -see the engine’s manual.
HR 40, 43, 48,
55 and 64
Filter
Valve
Danger !