Mercury 9.9 HP Twostroke – Whether you're a fisherman, a yachtie or looking to run a smaller leisure vessel – Mercury's range of portable TwoStrokes provide the power that can go anywhere and keep on going.

Calculate your fuel savings

The Mercury Fuel Savings Calculator will allow you to easily calculate the possible fuel savings of a Mercury FourStroke outboard!

Choose how you use your boat, select the TwoStroke and FourStroke horsepower – and our tool will show your potential fuel savings. If you're looking to upgrade or add more power, you can even choose different FourStroke and TwoStroke horsepower options!

Single-Handed Control.

The exclusive Mercury multi-function tiller handle enables one-hand control of shifting, stopping, tilting, steering and throttle control with friction adjustment,


Easy to handle with conveniently located carrying handles and grips.


With proven reliability around the world. 

Instant Start.

Easy starting with modular electronic CD ignition. And very simple to maintain too.

HP / kW
  • 9.9 / 7.4
Displacement (CID/CC)
  • 12 / 262
Cylinder Configuration
  • I-2
Full throttle RPM
  • 5000 – 6000
Fuel induction system
  • Cross flow (1 carb)
  • Manual
  • Tiller
Shaft length
  • 15″ / 381 mm
Gearcase ratio
  • 2.00 : 1
Dry weight *Lightest model available
  • 35
Emissions Star Rating
  • 0
Bore and stroke
  • 60 x 46
Trim system
  • 6 position with ratchet trim
Oil Injection
  • Pre-mix