Description
Mercury 3.5 HP FourStroke (1F03201KK) — Portable Power for Small Boats
The Mercury 3.5 HP FourStroke (model 1F03201KK) is a compact, carry-friendly outboard that delivers quiet, fuel-efficient propulsion for dinghies, inflatables, canoes, tenders, and light jon boats. It’s simple to own and operate with manual start, tiller steering, and a built-in fuel tank.
Why Choose This Portable FourStroke
- Lightweight & Compact: Easy to carry, mount, and stow—great for ramps, docks, and quick trips.
- Quiet FourStroke Efficiency: Smooth running with clean emissions and miserly fuel use.
- Tiller Control & 360° Turning: Simple, precise maneuvering in tight spaces.
- Manual Start with Easy Pull: Reliable, low-maintenance ownership.
- Integral Fuel Tank: On-engine tank keeps setups tidy for tenders and cartoppers.
Engine Specifications
| Manufacturer | Mercury Marine |
|---|---|
| Model | 1F03201KK (3.5MH, 15" short shaft) |
| Horsepower / kW | 3.5 HP / 2.6 kW |
| Engine Type | 4-stroke, 1 cylinder |
| Displacement | 85 cc |
| Full-Throttle RPM | 5,000–6,000 RPM |
| Fuel Induction | Carbureted; 2-valve pushrod (OHV) |
| Ignition / Starting | Manual start (decompression assist on many units) |
| Steering | Tiller with 360° turning |
| Gear Shift | F-N (forward-neutral) |
| Gear Ratio | 2.15:1 |
| Shaft Length | 15" (381 mm) short shaft |
| Dry Weight | 38 lb (varies by listing/config 38–41 lb) |
| Exhaust | Above prop |
| Trim Positions | 4 |
| Fuel | Unleaded 87 octane (up to 10% ethanol) |
| Fuel Tank | Integral; approx. 0.3 gal (1.1 L) |
| Recommended Oil | Mercury FourStroke 10W-30 |
| Charging | N/A on most 3.5 HP models |
| Cooling | Water-cooled with thermostat |
| Emissions | 3-Star CARB rating (typical) |
Great For
- Yacht tenders & dinghies
- Inflatable boats & canoes
- Small jon boats & pond skiffs
- Camp, hunt, and fish on calm water
Rigging & Operation Notes
- Mounting: Short-shaft transoms (~15").
- Prop Selection: Keep WOT in the 5,000–6,000 RPM range with your typical load.
- Fuel Care: Use fresh 87-octane; up to E10 is fine. Treat and rotate fuel for seasonal storage.
- Maintenance: Follow Mercury’s interval chart for oil, gear lube, and impeller service.
Get Pricing & Availability
Talk to our certified team for current pricing, lead times, and recommended accessories for your boat.
Frequently Asked Questions
What boats match a 3.5 HP Mercury FourStroke?
Great for dinghies, inflatables, canoes, tenders, and small jon boats where light weight, easy starting, and quiet operation matter most.
Is it easy to transport and store?
Yes—this portable FourStroke is compact and light enough to carry by hand and stow in a truck bed or cockpit locker.
What kind of controls does it use?
Tiller steering with forward-neutral shifting on the engine.
What fuel does it use?
Regular unleaded gasoline (minimum 87 octane); up to 10% ethanol is acceptable.
Does it have battery charging?
No—charging systems typically start on 4 HP and up. Use a portable charger or choose a model with alternator output if you need 12V power.