A 15 hp outboard motor generally weighs around 99 pounds (45 kg), typically without the battery if it's an electric model, or dry for a gasoline model. While the weight can vary slightly by brand and specific model, this figure represents a common dry weight for outboards in this horsepower class.
Understanding Outboard Motor Weights
The weight of an outboard motor is influenced by several factors, including its horsepower, specific features, and the manufacturer's design. Although you specifically asked about a Johnson outboard, general weight figures are often categorized by horsepower, as provided below. A 15 hp Johnson outboard would fall within this general weight range.
Typical Weights by Horsepower
Outboard motor weights vary across different horsepower categories. The table below illustrates typical dry weights for various portable and mid-size outboards:
| Category | HP | Dry Weight |
|---|---|---|
| Portable | 9.9 HP | Around 79 lbs / 36 kg (without battery) |
| Mid Size | 15 HP | Around 99 lbs / 45 kg (without battery) |
| Mid Size | 30 HP | Around 161 lbs / 73 kg (without battery) |
| Mid Size | 60 HP | Around 218 lbs / 99 kg (without battery) |
Factors Influencing Outboard Weight
Several design and feature choices can lead to variations in an outboard motor's weight, even within the same horsepower class:
- Shaft Length: Outboards come with different shaft lengths (e.g., short, long) to accommodate various transoms, with longer shafts adding a small amount of weight.
- Starting Method: Motors with an electric start system will be slightly heavier than those with only a manual pull start.
- Features: Additional features like power trim and tilt, fuel injection systems, or advanced exhaust systems can contribute to the overall weight.
- Engine Type: While most modern 15 hp outboards are four-stroke, older two-stroke models might have different weight characteristics.
- Brand and Model: Different manufacturers, such as Johnson (historically), Mercury, Yamaha, Honda, or Tohatsu, design their motors with varying materials and internal components, leading to minor weight differences between brands for the same horsepower.
Therefore, while a specific 15 hp Johnson outboard model might have a precise weight, the general estimate of around 99 pounds (45 kg) is a reliable figure for a motor in this category.
