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(32) BREAK-IN OPERATION
A new engine or an engine that has been completely overhauled by being fitted with a new piston, rings,
valves and connecting rod should be thoroughly RUN-IN before being put back into service.
Good bearing surfaces and running clearances between the various parts can only be established by operating
the engine under reduced speed and loads for a short period of time.
While the engine is being tested, check for oil leaks.
Make final carburetor adjustment and regulate the engine operating speed.
Step
Model
EX13
Model
EX17
Model
EX21
Model
EX27
Engine
Speed
Time
Step 1
No Load 2500 r.p.m. 10 min.
Step 2
No Load 3000 r.p.m. 10 min.
Step 3
No Load 3600 r.p.m. 10 min.
Step 4
1.5 HP 2 HP 2.5 HP 3.5 HP 3600 r.p.m. 30 min.
Step 5
3 HP 4 HP 5 HP 7 HP 3600 r.p.m. 30 min.
(30) EXTERNAL INSPECTION
Reassembly is completed. Check that the wiring is correct and that there are no loose nuts and bolts or any
other faults visible on the outside of the engine.
(31) FILLING WITH ENGINE OIL
Use the automobile engine oil of API service class SE or higher grade.
The amount of oil depends on the engine model. Refer to the table below.
Model
EX13
Model
EX17
Model
EX21
Model
EX27
Engine oil volume 0.6 L 1.0L