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Go anywhere with portable power.
Taking the fun with you is one of the great advantages of owning an inflatable boat or small fishing boat. Mercury offers a complete line of extremely light portable FourStroke outboards, with the widest range of models to choose from. So wherever you and your boat go, your Mercury portable FourStroke can also go. The entire line makes operation and portability easy with smart, simple features. Plus, clean, quiet, fuel-efficient FourStroke performance makes them the obvious power of choice.
Key 8 and 9.9hp Features
Fingertip Control
Mercury Fourstrokes are designed with a boat load of user-friendly features, such as our multifunction tiller handle. This tiller handle gives you easy one-handed operation of shifting, stopping, throttle, throttle friction, and tilt. More control equals better maneuverability.
Convenient Trim Ratcheting
The 8 and 9.9hp models come standard with both ratcheting trim and tilt lock. The ratcheting trim allows you to easily trim the motor up to the height you need. When you’re ready to tilt the engine down, the tilt lock will keep it at your selected angle.
Lightweight Portable Champions
The lightest engine in its class, the 8 and 9.9hp outboards come in at a scant 83 pounds. These outboards are a perfect fit for a wide range of small boat applications.
Kick it up a Notch.
- The 9.9hp Mercury ProKicker features a compact, integrated power tilt and a heavy-duty transom bracket for maximum strength, speed, and durability.
- Additionally, the 9.9hp ProKicker sports an updated graphics package designed to complement the OptiMax Pro XS and Verado outboards. Installed next to a Pro XS or Verado outboard, the improved ProKicker graphics will make your rig stand out from the rest of the pack.
- Patented Centering Straps. Holds the engine straight without additional hold-downs when running in rough conditions or trailering (Standard on Tiller Pro Kickers).
9.9 ProKicker Specifications
| HP/kW | 9.9 / 7.3 |
|---|---|
| Full throttle RPM | 5000-6000 |
| Cylinder Configuration | I-2 |
| Displacement (CID / CC) | 12.8 / 208 |
| Bore and Stroke (in / mm) | 2.16 x 1.73in 55 x 44mm |
| Fuel Induction System | 2 valves per cylinder, single overhead cam (SOHC) |
| Ignition | CDI w/electronic spark advance |
| Fuel System | Carbureted |
| Alternator Amp | 6 amp / 76 watt |
| Cooling System | Water-cooled with thermostat |
| Starting | Electric Manual |
| Gearcase Ratio | 2.42:1 |
| Gear Shift | F-N-R |
| Steering | Remote Tiller |
| Trim System | Power Tilt |
| Trim Positions | Ratcheting |
| Exhaust System | Through prop |
| Shallow water drive | Yes |
| Shallow water trim range (degrees) | 16 |
| Recommended Oil | Mercury 4-Stroke Outboard Oil |
| Recommended Fuel | 87 octane/up to 10% ethanol |
| Engine Protection Operator Warning System | Low oil pressure Over-rev |
| Shaft Length | 20 in (508 mm) 25 in (635mm) |
| Dry Weight * Lightest model available | 96lbs / 44kg |
| CARB Star Rating | 3 |
FourStroke 8 - 9.9 HP Engine Tests
FourStroke 8 - 9.9 HP Resources
You can order all available Mercury literature online or through any authorized Mercury dealer. Please have your outboard or sterndrive serial number before placing the order.
- Operation, Maintenance and Warranty Manuals
- Parts Manual
- Service Manual
Request printed brochures by mail or download as an electronic PDF.
Request a BrochureFourStroke 8 - 9.9 HP Boat Brands
Step Up To BigFoot
Big-time power. With a longer design and bigger components, Mercury BigFoot was made specifically to deliver the type of power, thrust and control that wider, heavier boats demand.
The BigFoot Difference (Blue shaded areas represent prop and gearcase advantages)
- 20% larger prop increases control especially at low speeds.
- Taller gearcase puts the prop deeper, below turbulent water, for improved performance.
- A low 2.42:1 gear ratio delivers thrust and maneuveraility that big loads demand.
- Oversized Antiventilation Plate. Oversized design prevents air from being drawn into the prop, which increases efficiency.
