Yanmar 4BY2 - New Engine Break in

New Engine Break In
• On the initial engine start-up, check for
proper engine oil pressure, diesel fuel
leaks, engine oil leaks, coolant leaks, and
for proper operation of the indicators and /
or gauges.
• During the first 50 hours of operation,
operate your new engine under a
substantial load at all times. For best
break-in results, operate the engine at
various speeds.
• During the first 50 hours of operation, try to
reduce unnecessary idling in Neutral.
• During the break-in period, carefully
observe the engine oil pressure and
engine temperature.
• During the break-in period, check the
engine oil and coolant levels frequently.
PRODUCT OVERVIEW
10 BY Series Operation Manual
© 2008 Yanmar Marine International