How Much Does a Small Outboard Motor Weigh? A Size-by-Size Answer
The number on the spec sheet decides whether your motor lives in the car boot or on a trailer, and whether you carry it down the slipway or ask a friend. Here are the real figures.
How much does a small outboard motor weigh? Roughly 13 to 17 kg (29 to 37 lb) for a 2.5 HP, 24 to 28 kg (53 to 62 lb) for 4 to 6 HP, and about 37 to 45 kg (82 to 99 lb) for 8 to 9.9 HP.
Fiona and the forty-two harbour steps
Fiona’s mooring is reached by forty-two stone steps, slippery with weed at low water. When she chose a motor for her tender, she did something nobody at the chandlery had suggested: she went home, filled a rucksack with bags of sand, and carried it down the steps.
At 15 kg (33 lb) the walk was easy. At 25 kg (55 lb) it was doable with the sack held close. At 40 kg (88 lb) she sat on step thirty and laughed at herself. That settled it faster than any brochure.
She bought a 2.5 HP four-stroke at about 17 kg (37 lb) and, for calm days, borrows her neighbour’s Torqeedo whose heaviest piece is the battery. She now carries the motor down in one trip and the fuel in the other.
Her rule is worth stealing: test the weight you will carry, over the ground you will carry it on.
Small outboard motor weights by horsepower
These are conservative typical dry weights for short-shaft tiller models. Long shafts, electric start and power tilt add a few kilos.
| Horsepower | Typical weight (kg) | Typical weight (lb) | Carry alone? |
|---|---|---|---|
| 2.3–2.5 HP | 13–17 kg | 29–37 lb | Yes, easily |
| 3.5 HP | 17–19 kg | 37–42 lb | Yes |
| 4–6 HP | 24–28 kg | 53–62 lb | Yes, with care |
| 8–9.9 HP | 37–45 kg | 82–99 lb | Short distances only |
| 15–20 HP | 44–52 kg | 97–115 lb | Two people recommended |
| 25–30 HP | 68–80 kg | 150–176 lb | No, usually left fitted |
| Torqeedo Travel (incl. battery) | about 15–17 kg | about 33–37 lb | Yes, splits into parts |
Why do outboards jump in weight at 8 HP and 25 HP?
Because the engine design changes: more cylinders, bigger blocks and heavier gearboxes.
Most motors up to about 6 HP are single-cylinder and very compact. From around 8 to 9.9 HP many move to twin cylinders, and weight almost doubles. At 25 to 30 HP, bigger blocks, EFI systems and stronger gearcases push weights towards 70 kg (154 lb) or more, which is why those motors usually get bolted on and stay put.
- Electric motors split into motor and battery, so no single piece is heavy.
- An outboard trolley or stand saves your back.
- Integrated tanks on tiny motors add a little weight when full.
How do I lift and carry a small outboard safely?
- Drain or close the fuel. Close the vent and fuel tap so nothing leaks while you move it.
- Carry it the right way up. Follow the manual’s carrying position so oil does not run into the cylinder.
- Use the carry handle and your legs. Keep the motor close to your body, back straight.
- Rest it on a stand or trolley. Never balance it on the transom while you step aboard.
- Fit it from inside a stable boat. Or pass it down to someone already aboard.
Lightweight motors in stock
Great picks if weight is your top priority. Prices are starting prices in USD.
Small outboard motor weight: FAQ
What is the lightest petrol outboard?
The 2 to 2.5 HP class is lightest, typically around 13 to 17 kg (29 to 37 lb). Check each model’s spec sheet, as figures vary by brand and shaft length.
How much does a 9.9 HP outboard weigh?
Most 9.9 HP four-strokes weigh about 37 to 45 kg (82 to 99 lb) depending on brand, shaft length and whether they have electric start.
Is an electric outboard lighter than petrol?
Total weight is often similar to a small petrol motor, but electric units like the Torqeedo Travel split into motor and battery, so each piece is lighter to carry.
Does a long shaft weigh more?
Yes, usually by around 1 to 2 kg (2 to 4 lb) on small motors because of the extra leg length.
Light enough to carry. Strong enough to matter.
Tell us how far you carry your motor and we will suggest the lightest one that does the job.