Used Yamaha 50 HP 2-Stroke Short Shaft Outboard Motor – 50HMHOS – 2011

Description

Used Yamaha 50 HP 2-Stroke Short Shaft Outboard Motor – 50HMHOS – 2011 is available from Machinery Store. Explore this Yamaha marine engine’s configuration, performance features, condition and included equipment below.

Engine Overview

Power your boat with a reliable Yamaha 50 HP 2-Stroke 50HMHOS outboard motor, designed for boaters who value simple mechanical construction, responsive performance, and easy maintenance.

This used Yamaha 50 HP two-stroke is described as a freshwater motor with no corrosion and is presented in exceptionally clean condition. The engine has 120 PSI compression across all three cylinders, providing a strong and even compression reading. It features electric start, three-carburetor fuel induction, oil injection, and trim/tilt capability.

With its lightweight three-cylinder design and proven Yamaha two-stroke platform, this 50 HP outboard offers a practical option for aluminum fishing boats, utility boats, skiffs, and other compatible vessels requiring a compact 50 HP engine.

Important: The product is marketed as a short-shaft model, but the existing technical listing also references a 20-inch shaft. Please verify the physical shaft length and transom height before purchase to ensure compatibility with your boat.

Engine Features at a Glance

• 50 HP Yamaha 2-Stroke Outboard
• Model: 50HMHOS
• Year: 2011
• 3-Cylinder 2-Stroke Engine
• 120 PSI Compression on All 3 Cylinders
• Freshwater Motor
• No Corrosion Reported
• Electric Start
• 3-Carburetor Fuel System
• Oil Injection
• Trim/Tilt
• Low-Hour Condition
• Complete Ready-to-Mount-and-Run Package

Yamaha Outboard Technical Specifications

Specification	Details
Brand	Yamaha
Model	50HMHOS
Year	2011
Horsepower	50 HP
Engine Type	2-Stroke
Cylinders	3
Displacement	698 cc / 42.6 cu. in.
Bore x Stroke	67.0 x 66.0 mm
Fuel System	3 Carburetors
Lubrication	Oil Injection
Starting System	Electric Start
Compression	120 PSI on all 3 cylinders
Full-Throttle RPM	4,500–5,500 RPM
Maximum Power	50 HP @ 5,000 RPM
Gear Ratio	1.85:1
Alternator Output	12V / 6A / 80W
Trim/Tilt	Trim/Tilt System
Shaft Length	Short Shaft — verify physical shaft length before purchase
Approx. Dry Weight	165 lb / 75 kg
Cooling	Water-Cooled

The Yamaha 50HMHOS platform is a three-cylinder, 698 cc two-stroke with three carburetors, oil injection, a 4,500–5,500 RPM operating range, 1.85:1 gear ratio, and approximately 165 lb dry weight in the short-shaft configuration.

Outboard Features and Equipment

Proven Yamaha 2-Stroke Design

The three-cylinder two-stroke configuration provides a strong power-to-weight ratio while retaining the straightforward mechanical design that makes traditional Yamaha outboards easy to service.

Strong Compression

Compression is reported at 120 PSI on all three cylinders, providing an even reading across the engine.

Electric Start

Electric starting makes the motor convenient for regular boating and fishing use.

Carbureted Fuel System

The three-carburetor fuel system keeps the engine mechanically straightforward and serviceable.

Oil Injection

The engine uses Yamaha’s oil-injection system, eliminating the need to manually premix fuel and oil during normal operation.

Lightweight Package

At approximately 165 lb dry, this Yamaha 50 HP platform is relatively lightweight for its horsepower class, making it suited to smaller boats where weight is an important consideration.

Performance and Repower Benefits

• Reliable Yamaha 50 HP performance
• Simple and proven 2-stroke design
• Strong, even 120 PSI compression
• Freshwater-use history
• No corrosion reported
• Electric start
• Oil-injected lubrication
• Lightweight three-cylinder configuration
• Excellent choice for fishing and utility boats
• Ready to mount and run

Performance & Applications

This Yamaha 50 HP 2-stroke is suited for applications where reliable mid-range horsepower and a relatively lightweight engine are important.

Ideal applications include:

• Fishing boats
• Aluminum boats
• Utility boats
• Skiffs
• Small fiberglass boats
• Work boats
• Tender boats
• General recreational boating

Always confirm that your boat is properly rated for a 50 HP outboard and that the shaft length matches the boat’s transom.

Compatible Boat Types

This motor may be suitable for:

• Aluminum fishing boats
• Small fiberglass fishing boats
• Utility boats
• Skiffs
• Jon boats
• Tender boats
• Lightweight recreational boats

Shaft length must be confirmed against your boat’s transom before ordering.

Engine Condition and Service History

Used – Excellent / Very Clean Condition

This Yamaha is described as a freshwater motor with no corrosion and exceptionally clean cosmetics. The listing describes it as a super-low-hour engine, although a specific hour-meter reading is not provided.

The engine has 120 PSI compression on all three cylinders and is presented as a clean, original Yamaha package.

Included Equipment

• Yamaha 50 HP 2-Stroke Outboard Motor
• Complete ready-to-mount-and-run package
• Standard engine components necessary for installation as supplied

Please confirm any specific rigging, controls, propeller, or accessories with us before ordering if they are essential to your installation.

Important Before Purchase

Please confirm the following before placing your order:

1. Shaft length: The product is advertised as a short-shaft model, but the existing technical listing also references a 20″ shaft. Confirm the actual physical shaft length before purchase.
2. Boat horsepower rating: Make sure your boat is rated for a 50 HP outboard.
3. Transom height: Confirm that the engine’s shaft length matches your boat.
4. Rigging compatibility: Verify steering, controls, fuel system, electrical connections, and mounting requirements for your specific boat.

Frequently Asked Questions

Is this Yamaha 50 HP a 2-stroke?

Yes. This is a Yamaha 50 HP 3-cylinder, 2-stroke outboard using a three-carburetor fuel system and oil injection.

What is the compression?

The engine is reported to have 120 PSI on all three cylinders.

Does it have electric start?

Yes. The 50HMHOS is equipped with electric starting.

Is this a short-shaft motor?

The product is advertised as a short-shaft model. However, the existing listing also references a 20″ shaft, so the actual shaft length should be confirmed before purchase to ensure proper boat compatibility.

Order Your Yamaha Outboard from Machinery Store

Confirm your boat’s horsepower rating, transom height, steering and rigging compatibility before installation. Contact Machinery Store to confirm availability, the exact package contents, delivery charges and any applicable warranty terms.