Description

The Yamaha 115hp 2-stroke outboard is a lightweight, high-torque engine known for its simple structure, easy maintenance, and robust performance compared to 4-stroke alternatives. It is a favored choice for speed and quick acceleration, often used in older, faster boat setups or for commercial applications where weight is a factor

Key Features and Specs:

Performance: Features a high-performance 2-stroke design, with some older models known for high-RPM operation and excellent acceleration.

Weight: Generally lighter than 4-stroke engines in the same horsepower class.

Design: Often features in-line 4-cylinder configurations, designed for reliability and quick throttle response.

Availability: While Yamaha has shifted focus to 4-strokes, many 2-stroke models are still available on the used market or for specific global markets

Maintenance and Tips:

Regular maintenance for a 115hp Yamaha 2-stroke outboard involves annual gear oil changes, spark plug inspection, water pump impeller replacement every 2–3 years, and using premium 2-stroke oil (50:1 ratio). Key tips include flushing with fresh water after every use, decarbing the engine, and replacing fuel filters annually to prevent carburetor issues

Essential Maintenance Checklist

Gear Oil: Change annually or every 100 hours. Check for metal particles, which indicate wear.

Impeller: Replace the water pump impeller every 2-3 years to avoid overheating.

Spark Plugs: Inspect regularly for fouling or wear; replace as needed.

Fuel System: Use high-quality 2-stroke oil and Fuel Stabilizer to prevent issues with modern fuel. Replace the fuel filter/water separator annually.

Lubrication: Grease all lubrication points to prevent corrosion.

Storage: If storing for more than a few weeks, use fogging oil to protect the cylinders