Wisconsin VH4D Repair Manual page 3

IMPORTANT
READ THESE INSTRUCTIONS CAREFULLY
All points of operation and maintenance have been covered as carefully as possible, but if further
information is required, send inquiries to the factory for prompt attention.
When writing to the factory, ALWAYS GIVE THE MODEL, SPECIFICATION AND SERIAL
NUMBER of the engine referred to.
Startin_o and ODeratin_o New Engines
Careful breaking-in of a new engine will greatly increase its life and result in troublefree operation.
A factory test is not sufficient to establish the polished bearing surfaces, which are so necessary
to the proper performance and long life of an engine. These can only be obtained by running a
new engine carefully and under reduced loads for a short time.
¯ Be sure the engine is filled to the proper level with a good quality engine oil.
¯ For proper procedures to follow when breaking-in a new engine, see 'Testing Rebuilt Engine'.
The various bearing surfaces in a new engine have not been glazed, as they will be with continued
operation, and it is in this period of "running in" that special care must be exercised, otherwise
the highly desired glaze will never be obtained. A new bearing surface that has once been
damaged by carelessness will be ruined forever.