PERIODIC MAINTENANCE Safety Precautions 12/05 SAFETY PRECAUTIONS EPA REQUIREMENTS Before servicing the BY2 marine engines, review the Safety Section on page 2-1 . The EPA emission regulation is applicable only in USA. Conditions to Ensure Compliance with EPA Emission Standards INTRODUCTION This section of the Service Manual describes the procedures for proper care and maintenance of the engine. This product is an EPA-approved engine. The following are the conditions that must be met in order to ensure that the emissions during operation meet the EPA standards: The Importance of Periodic Maintenance Ambient temperature:
-16° to +40°C (3° to 104°F) Engine deterioration and wear occurs in proportion to length of time the engine has been in service and the conditions the engine is subject to during operation. Periodic maintenance prevents unexpected downtime, reduces the number of accidents due to poor machine performance and helps extend the life of the engine. Relative humidity: 80% or lower The fuel and lubricating oil used should be as follows: Diesel fuel: ASTM D975 No. 1-D or No. 2-D, or equivalent (minimum cetane No. 45) Performing Periodic Maintenance Lubricating oil: Type API, Class SM, SL, SJ, SH / CF and CF Perform periodic maintenance procedures in an open, level area free from traffic.
If possible, perform the procedures indoors to prevent environmental conditions such as rain, wind or snow from damaging the engine. WARNING! Exhaust Hazard. NEVER block windows, vents or other means of ventilation if the engine is operating in an enclosed area. All internal combustion engines create carbon monoxide gas during operation. Accumulation of this gas within an enclosure could cause illness or even death. Be sure to perform inspections as outlined in Periodic Maintenance Procedures on page 4-9 and keep a record of the results. Pay particular attention to these important points:
Replacing the engine oil Replacing the lube oil filter Replacing the fuel filter Replacing the air filter Note: Inspections are divided into two sections in accordance with who is responsible for performing the inspection: the user or the maker. Yanmar Replacement Parts Yanmar recommends that you use genuine Yanmar parts when replacement parts are needed. Genuine replacement parts help ensure long engine life. Required EPA Maintenance To maintain optimum engine performance and compliance with the Environmental Protection Agency (EPA) Regulation Engines, it is essential that you follow the Periodic Maintenance Schedule on page 4-5 and Periodic Maintenance Procedures on page 4-9 .
© 2009 Yanmar Marine International BY Service Manual 4-3