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2. Inspection
Items to Check Prior to Test Run
• Fuel line condition
• Gearshift lever operation
• Electrical wiring, connections and clamps
• Operation, including catch, of reverse lock
• Integrity of self-diagnosing function
• Oil line condition
Items to Check During the Test Run
Check the following items while the engine is in an idling state.
• Fuel leakage from the various joined seams of the engine.
• Water leakage from the various joined seams of the engine.
• Unusual sounds during operation.
• Idling speed and stability
• Stop switch operation
• Tachometer needle operation
• Clutch operation
• Engine speed during acceleration and deceleration
• Cooling water discharge (with sufficient force from water inspection hole)
Additional Tightening After Test Run
• Retighten the various bolts to specified torque values.
Breaking in Engine
• It is important to perform a breaking in of the engine in order to properly seat the sliding surfaces of the
various parts in cases where pistons, piston rings, piston pins and cylinders have been replaced.
• Perform the various breaking in steps listed in the table below after pressure feeding engine oil and
allowing the engine to idle for 30 minutes.
• Breaking in period: 10 hours.
Time
0 to 10 min.
At minimum
Breaking
in engine
At closed throttle
Operating range
• The use of inferior or non-standard fuels and oils can not only shorten engine life but can also
cause starting problems and lead to breakdowns. Be sure to always use the designated fuel and
engine oil types.
• Do not use a gasoline/oil mixture in this engine.
10 min. to 1 hr.
speed
At half throttle
Approx. 3,000 rpm
or less
1 hr. to 2 hrs.
2 hrs. to 10 hrs.
Full throttle for
At full throttle for
1 minute, at
short intervals
10 minute intervals
At 3/4 throttle or less
At 3/4 throttle
Approx. 4,000 rpm
Approx. 4,000 rpm
or less
Caution
10-3
10 hours or more
At normal operating speed
5,150 to 5,850 rpm
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Table of Contents
Troubleshooting
