1998 Mercury 40HP 2 Stroke Outboard Motor – 20” Shaft – Power Trim – 59CI

1998 Mercury 40HP 2 Stroke Outboard Motor – 20” Shaft – Power Trim

This 1998 Mercury 40HP 2 Stroke Outboard Motor is a solid-running 59 cubic inch (59CI) engine with a 20-inch shaft and functional power trim. It was taken in as a dealer trade-in and was being used regularly until the previous owner upgraded to a higher horsepower motor.

Manufactured by Mercury Marine, this 3-cylinder two-stroke delivers strong performance in a lightweight, simple platform that is easy to service and maintain.

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Key Specifications

• Year: 1998

• Brand: Mercury

• Horsepower: 40HP

• Engine Type: 2 Stroke

• Displacement: 59CI

• Cylinders: 3

• Shaft Length: 20” (Long Shaft)

• Power Trim: Yes

• Condition: Used – Running

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Compression Test Results

• Cylinder 1: 120 PSI

• Cylinder 2: 118 PSI

• Cylinder 3: 126 PSI

Compression is strong and within proper range across all cylinders.

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Mechanical Condition

• Runs strong on test stand

• Pumps water properly

• Shifts smoothly in and out of gear

• Power trim operates correctly

Important Note:

The oil injection tank sensor appears to need replacement. The low-oil alarm was triggered during testing, and the sensor was unplugged. Buyer may choose to replace the sensor or convert to premix if preferred.

As with any 27-year-old motor, minor maintenance items may be expected.

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Ideal Applications

This 40HP Mercury is well suited for:

• Aluminum fishing boats

• Jon boats

• Small center consoles

• Skiffs

• Utility boats

Lightweight two-stroke design offers strong acceleration and simple maintenance.