Timing Belt Inspection; Changing Engine Oil; Engine Oil Capacity; Oil Changing Procedure - Mercury 25 EFI Service Manual

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Timing Belt Inspection

Inspect the timing belt and have it replaced by an authorized dealer if any of the following conditions are found.

Cracks in the back of the belt or in the base of the belt teeth.

Excessive wear at the roots of the cogs.

Rubber portion swollen by oil.

Belt surfaces roughened.

Signs of wear on edges or outer surfaces of belt.

Engine oil capacity is approximately 1.8 liter (1.9 quarts).

Tilt the outboard up to the trailer position.

Turn the steering on the outboard so that the drain hole is facing downward. Remove drain plug and drain engine oil into

an appropriate container. Lubricate the seal on the drain plug with oil and install.

Place a rag or towel below the oil filter to absorb any spilled oil.

Unscrew old filter by turning the filter to the left.

Clean the mounting base. Apply film of clean oil to filter gasket. Do not use grease. Screw new filter on until gasket

contacts base, then tighten 3/4 to 1 turn.

90-8M0105568 eng MARCH 2016

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