30-second answer
The transom rating is rarely the limit you hit first. Weight and shaft length usually are.
Best forBuyers making a propulsion decision before choosing a brand
Watch outDo not turn a general guide into a final specification without checking the exact boat and local conditions
Outboard Horsepower, Weight and Shaft Length
- Maximum horsepower — the number everyone quotes.
- Maximum engine weight — the number that actually governs most small tenders.
- Shaft length — short shaft is the design assumption on much of the inflatable-catamaran market. Get this wrong and the boat is unusable.
Outboard Size Guidance for Small Dinghies
On a packable tender, every kilogram on the transom is a kilogram you lift over the pushpit twice a day. A 3.5 hp two-stroke-era engine weighed very little; a modern 6 hp four-stroke does not. Be honest about what you will lift at 60.
Electric outboards have become genuinely viable at the small end. The Takacat T220UL, for example, is designed around propulsion of roughly 2 hp equivalent and around 10 kg — and for many owners that is the whole boat solved.
Buying a Dinghy and Outboard Package
There is a real argument for buying the tender and outboard from the same brand ecosystem. Mercury is the clearest Australian example: inflatable, outboard and national engine dealer support in one transaction, which matters enormously when something fails in a regional port.
How this guide was made
Written and reviewed by Gabriel Machuret. BuyDinghy compares published manufacturer and Australian distributor material, labels missing specifications instead of estimating them, and separates editorial judgement from verified facts. Read the methodology or report a correction.