Mercury 3.5 HP FourStroke 2025: Small, Silent, Strong
The 2025 Mercury 3.5 HP FourStroke continues the formula: an 85cc OHV single at 41 lbs with extra-quiet through-prop exhaust, CDI ignition, F-N shift, full 360° tiller steering, and an integral fuel tank. A refined lightweight in the small portable class.
Key Features (2025)
- 85cc OHV single; 41 lbs
- Through-prop exhaust — extra quiet
- F-N + 360° steering; integral tank
Specifications
- Engine: 1-cylinder OHV four stroke, 85cc (5.2 cu in)
- Horsepower: 3.5 HP
- Starting: Manual
- Steering: Tiller, 360°
- Gearshift: F-N
- Fuel: Integral tank, 87 octane
- Shaft: 15″ (S) / 20″ (L)
- Weight: 41 lbs (lightest model)
Benefits & Applications
For tenders, inflatables, jons, utility boats, and sail kickers. Siblings: 2.5 HP 2025, 4 HP 2025.
Compare Model Years
See the 3.5 HP 2024 and 3.5 HP 2026, all Mercury Outboards, or the Mercury brand guide.
Frequently Asked Questions
What does the 2025 model cost?
$1,340, in stock.
Shaft lengths?
15″ and 20″.
Fuel?
87-octane gasoline from the integral tank.


