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Step Model EX35 Model EX40 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 4.3 HP 4.8 HP 3600 r.p.m. 30 min.

Step 5 8.5 HP 9.5 HP 3600 r.p.m. 30 min.

(33) 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.

Subaru EX40 Service Manual

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