Small Outboard Motor: A 6-Point Checklist to Pick the Right One
You do not need to understand every motor on the market. You need to get six details right about the one you buy. Here they are, in the order that matters.
A small outboard motor is a compact, portable engine, usually 2.5 to 30 HP, that clamps or bolts to the back of a small boat and steers it with a tiller handle.
Dale bought the wrong one first
Dale found a “great deal” on a 6 HP outboard at a yard sale. He clamped it onto his 14-foot aluminum boat, pulled the cord, and watched the propeller spin half out of the water, spraying foam everywhere. The motor had a short shaft. His transom was a 20-inch.
He sold it at a loss and started over, this time with a checklist. Horsepower from the capacity plate. Shaft length from a tape measure. Pull start because he launches alone and wanted fewer parts. Weight under 60 pounds because his back had opinions.
The second small outboard motor he bought was a long-shaft Suzuki DF6A. It bit the water cleanly, pushed the boat and two people at a steady clip, and started on the second pull every morning of his vacation.
Same horsepower as the yard-sale motor. The only difference was one measurement he skipped the first time.
How do I choose a small outboard motor?
Work through these six points in order. Each one narrows the list.
- Horsepower. Check the capacity plate for the max HP, then aim for about 60 to 90 percent of it.
- Shaft length. Measure from the top of the transom straight down to the bottom of the hull. About 15 in means short shaft; about 20 in means long shaft.
- Start type. Pull start is lighter and simpler. Electric start needs a battery but is easier on the shoulder, especially from 15 HP up.
- Weight. Check the spec sheet. If you will lift it alone, stay under roughly 60 lb.
- Fuel setup. Motors up to about 6 HP often have a built-in tank. Many also accept an external tank for longer trips.
- Gas or electric. Electric suits quiet, short-range use and electric-only waters. Gas suits range and speed.
Which single motor fits which boat?
If you only want one answer, start here.
| Your boat | The one motor to look at | Shaft | From |
|---|---|---|---|
| 8–10 ft inflatable | Tohatsu MFS3.5 | Short | $1,220 |
| 12 ft car-topper | Mercury 5 HP | Short | $1,760 |
| 14 ft boat, calm lake | Suzuki DF6A | Short or long | $1,750 |
| 14 ft jon boat, needs to plane | Honda BF15 | Short | $3,950 |
| 22 ft sailboat | Yamaha F8 | Long | $2,820 |
| Electric-only reservoir | Torqeedo Travel 1103 CL | Long | $2,599 |
Top single-motor picks, in stock now
Each of these is an easy “buy it and forget it” choice in its size.
Small outboard motor: FAQ
What is the smallest outboard motor?
Among gas four-strokes, the smallest are around 2.3 to 2.5 HP, such as the Honda BF2.3 and the Suzuki DF2.5. Electric models like the Torqeedo Ultralight go smaller and lighter still.
How do I know if I need a short or long shaft?
Measure your transom height from the top down to the bottom of the hull. Around 15 in takes a short shaft, around 20 in takes a long shaft.
Can one person lift a small outboard motor?
Most motors up to about 6 HP weigh under 60 lb and are a one-person lift. From about 9.9 HP up, weight climbs quickly and a second person or a permanent mount helps.
Is a small outboard motor worth buying new?
New motors come with a factory warranty, the correct shaft length for your boat and no history of stale fuel or saltwater neglect. For many buyers that peace of mind is worth the price difference.
Measure once. Buy once.
Send us your transom height and plate rating and we will confirm the exact motor before you order.