4
7. Running-in operation.
① The 1
st
hour: Run the engine at 2000 rpm or at about half the throttle.
② The 2
nd
hour: Run the engine at 3000 rpm or at about 3/4 of the throttle.
③ Next 8 hours: Avoid running the motor at full throttle for 5 consecutive minutes.
8. Check after running-in operation
① Check the gear oil for water.
② Check the fuel oil pipeline for leaks.
③ After running-in operation, run the engine at idle speed and flush the cooling
water channel with fresh water using flushing tools.
9. After running-in operation, check the idle speed of the engine.
① Preheat the engine for 5 minutes.
② Use a tachometer to measure the idle speed of the engine.
Make corresponding adjustment if it does not conform to the specified value. Idle
value: 750 ~ 850rpm.
③ Turn the throttle stop screw clockwise or counterclockwise until the specified idle
speed is reached.
④ After adjusting the idle speed, speed up several times to check the stability of the
engine.
Attention:
Idle speed adjustment needs to be carried out by qualified maintenance personnel using
professional equipment; Random adjustment may cause starting difficulties, weakness, jitter
and other faults of the engine.
Special Tools and Testing Equipment
Various special tools and testing equipment will be used in the repair and maintenance of outboard
motors. Skilled and correct use of these tools and equipment can help improve your work efficiency
avoid damage to personnel and outboard motors.
Special tools:
Clearance gauge Piston slideway Flywheel gripper and
flywheel puller
Oil filter spanner Bearing puller Valve spring compressor kit
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