Service Manual 75-90 HP E-TEC Oiling System [Components]

The oiling system includes the following components:

• Oil tank

• Oil injection pump and manifold assembly

• Electrical circuit

• LOW OIL and NO OIL warning systems

• Cylinder and crankcase

• Oil recirculation system.

The oil tank is mounted on the powerhead under the engine cover. Oil level must be monitored. Oil Tank Components:

• Tank, 3 quart. (2.8 liter) capacity

• Oil pickup and filter assembly

• Oil injection pump and manifold assembly

• LOW OIL sending unit

• Oil distribution hoses

006757

The oil injection pump is an electric (55 V) actuator style pump. It draws oil from the oil tank and supplies pressurized oil to the oil manifold. The EMM supplies 55 V and controls activation of the pump.

The oil manifold distributes the oil supplied by the pump.

006481

1. Oil injector pump
2. Oil distribution manifold
3. Pickup tube and filter
4. Low oil sending unit

The oil injector is powered by the 55 V electrical circuit. The EMM controls pump operation by rapidly connecting and disconnecting the pump’s internal coil to ground.

The EMM monitors the oil injection pump electrical circuit. If circuit voltage is beyond the specified range, or the circuit is open, the EMM:

A sending unit in the oil tank pick-up assembly monitors the oil level in the oil tank.

If the oil level falls below one-quarter capacity, the EMM signals:

Approximate oil reserve at Low Oil activation:

• 0.61 qt. (0.57 l).

When the oil level falls below one-quarter, the EMM begins counting oil pump pulse cycles. When it reaches 4800 pulses, the EMM:

To recover from S.A.F.E. mode, the oil pump must cycle for a minimum of three pulses with the oil level above one-quarter.

If outboard has been run for more than 3 hours with NO OIL faults (codes 34 & 117), the EMM

The oil distribution manifold provides crankcase lubrication through oil distribution hoses and pressed-in fittings on the crankcase and cylinder block.

006758

1. Crankcase oil fittings

006615

1. Cylinder block oil fittings

External hoses and fittings, internal cylinder/crankcase passages, and intake manifold passages are used to recirculate any accumulation of oil from various locations in the powerhead. The movement of oil is controlled by check valves.

Cylinder Recirculation

Internal powerhead oil drain passages connect the intake port areas of the cylinders to circulate residual oil in the block. External fittings and in-line check valves on each side of the cylinder block control the movement of oil from the lower cylinder port to the upper cylinder port.

Crankcase / Main Bearing Recirculation

The movement of oil through the main bearings is controlled by internal passages, external fittings and hoses, and check valves.

Lower to upper main bearing oil flow:

• Lower main bearing cavity to internal crankcase passage to external fitting, external hoses with in-line check valve to external fitting at upper main bearing, and into upper main bearing through internal crankcase passage.

• Internal crankcase passage to external fitting in crankcase cover at upper main bearing, hose routed to reed plate fitting. This circuit vents the upper main bearing cavity to promote oil flow.

002872

1. Upper main bearing vent

Refer to the OIL RECIRCULATION DIAGRAM on p. 178.

Oil Priming

The oiling system of the outboard must be primed:

• When the outboard is first installed.

• Whenever the oil supply to the oil lift pump is disconnected or disrupted.

• Whenever an oiling system component is removed or replaced.

Refer to Oil Supply Priming on p. 54.

Oiling Rates

EMM programming controls the rate of oil injection based on engine RPM. This rate can be adjusted for the grade of oil being used, and also for powerhead break-in. Use Evinrude Diagnostics software to access these features.

Refer to Oil Injection Rate on p. 53.

Break-in Oiling

The EMM automatically supplies extra oil to the engine during the first two hours of operation, above 2000 RPM.

• Use Evinrude Diagnostics software to make sure the break-in program has been started on a new outboard.

• Use the diagnostics software to start break-in oiling after a powerhead rebuild.

006540

1. Break-in oil setting

IMPORTANT: The operator must monitor the oil tank level to confirm oil consumption. This may require several hours of operation above idle speed.