CHAPTER 3
3-12
Note: Your outboard uses other lubricants in addition to engine oil
such as power trim fl uid and propshaft gearcase lubricants to reduce
wear on moving components. These fl uids should be checked
according to the recommended maintenance procedures determined
by the outboard manufacturer.
Engine Oil
The purpose of engine oil is to lubricate the internal components of
the engine and ensure that parts that regularly move against each other
have reduced friction to reduce wear and noise between components.
An oil fi lter keeps metal particles and water out of the engine’s interior.
Yahama engines performing on regular oil should have the oil drained
and replaced after the fi rst 20 hours of operation or 3 months, and
every 100 hours or at 1 year intervals thereafter.
Gearcase Oil
Gearcase oil keeps all the mechanical components of the propshaft
gear assembly functioning optimally. It reduces friction in the gearcase
as the gears revolve. Sometimes gearcase oil is called gear lubricant,
as the oil essentially lubricates the gears inside the gear box. Gearcase
oil should be inspected periodically according to factory maintenance
schedules. Use outboard manufacturer’s recommended oil.