Mercury 9.9HP MH FourStroke Outboard (Manual Start, 15" Shaft)
SKU: MERC-9.9-MH

Compact, lightweight, and built for simplicity, the Mercury 9.9HP MH FourStroke is the perfect match for small boats, jon boats, inflatables, and tenders. With a manual start and tiller control, it delivers smooth, dependable performance without the need for a battery.

Key Features
9.9HP inline 2-cylinder FourStroke engine
208cc displacement with Single Overhead Cam (SOHC)
Manual start — no battery required
15" short shaft, ideal for shallow transom boats
Remote or tiller steering compatible (controls sold separately)
Lightweight design at only 84 lbs (38 kg) — easy to carry and install

Reliable Performance
Full throttle range: 5000–6000 RPM
Carbureted fuel system with CDI ignition and electronic spark advance
Standard 2.08:1 gear ratio for balanced performance
Water-cooled system with thermostat for consistent temperature control

Durability & Safety
Through-prop exhaust for quiet and clean operation
Shallow water drive with a 16° trim range
Ratcheting trim positions for adjustable control
Operator warning system protects against low oil pressure and over-rev
6 amp / 76 watt alternator (manual start models do not charge the battery)

Additional Specs
Fuel: 87 octane (up to 10% ethanol)
Oil: Mercury 10W-30 FourStroke Marine Oil
Includes 3.2-gallon (12L) external fuel tank
Color: Phantom Black
CARB 3-Star rated for ultra-low emissions