The 9.9HP Outboard: Why It’s the “Goldilocks” of Marine Engines
In the Australian boating world, few engines are as legendary as the 9.9HP. It is widely considered the “Goldilocks” motor—powerful enough to get a 3.7m tinnie on the plane, yet light enough for one or two people to lift. At Wave Engines, our 2.5HP to 9.9HP portable range is our most popular category for a reason.
The 9.9HP Advantage
Most modern 9.9HP 4-strokes share the same engine block as their 15HP or 20HP siblings, meaning you get massive torque in a restricted power class.
Unlike smaller motors, many 9.9HP models like the Suzuki DF9.9BT offer electric start and battery charging capabilities.
Brand Comparison: Which 9.9HP is Best?
If you are looking for the smoothest operation, the Yamaha F9.9LEB is a masterpiece of engineering. For those who prioritize fuel injection (EFI) for easy starting in all temperatures, Suzuki and Mercury lead the way. All these brands are available new with full Australian warranties at our South Melbourne store.

The Yamaha 9.9HP High-Thrust
Perfect for pushing heavy sailboats or as a reliable “kicker” motor for large fishing boats. Shop the Yamaha Range →
Portability and Storage
The 9.9HP is the largest engine most people would consider “portable.” It typically weighs between 38kg and 45kg. If you plan on removing the motor after every trip, check our Frequently Asked Questions for advice on the best engine trolleys and storage techniques to protect your 4-stroke.
Ready to Upgrade Your Tinnie?
Order your new 9.9HP today and enjoy flat-rate $220 shipping anywhere in Australia.
Browse 9.9HP MotorsContact Wave Engines | 85 Tope Street, South Melbourne | 0468 107 034