Doosan AD158TI, Operation & Maintenance Manual

Page: 29 / 294

Commissioning and operation - 23 -
3.3. Engine Break-in
During the first 20 hours of operation, you must follow the Engine Break-In procedure to ensure maximum per-
formance and long engine life.
Note :
Failure to follow the Engine Break-in procedure may result in serious engine damage.
3.3.1. New engine break-in 20 hours
All DOOSAN marine engines have been run for a short period of time as a final test at the factory. You must
follow the Engine Break-In procedure during the first 20 hours of operation to ensure maximum performance
and longest engine life.
Note :
To ensure proper lubrication during the break-in period, do not remove factory break-in oil until 20 hours
break-in is completed.
3.3.2. Initial two hours of break-in
For the first five to ten minutes of operation, operate engine at a fast idle (below 1,300 rpm) During the
remaining first two hours of operation, accelerate to bring boat onto plane quickly and bring throttle back to
maintain a planing attitude. During this period, vary the engine speed frequently by accelerating to approxi-
mately three-fourths throttle (1,500 ~ 1,600 rpm) for two to three minutes, then back to minimum planing
speed(700 ~ 800 rpm).
After the engine has reached operating temperature, momentarily reduce engine speed, then increase
engine speed, to assist the break-in of rings and bearings. Maintain planing boat attitude to avoid excessive
engine load.
Note :
Do not run engine at any constant rpm for prolonged periods of time for this initial two hours of break-in.