Yamaha 4 HP Tiller Outboard Motor - F4 - 2025

The Yamaha F4 is a compact and portable 4 - stroke outboard that mirrors the performance of the OHV F6 with a couple fewer horses, but just as much reliability. Lightweight and easy to handle, it features a built - in fuel tank and the option to connect to an external tank for extended range. With Yamaha's trusted engineering and easy starting system, the F4 delivers reliable power in a highly portable design.

Features:

• Tiller handle control with Forward - Neutral - Reverse shifting and ergonomic twist - grip throttle
• Lightweight design at only 59 lbs (15" shaft model, dry weight)
• Built - in decompression device for effortless manual starting
• 6A alternator for reliable battery charging (charging kit required, sold separately)
• 3 - way storage positions: starboard, front, or port side down
• Integral fuel tank with switchable access to external tank for extended range
• Water - cooled with thermostatic control for consistent engine temperature
• Ultra - low emission, CARB 3 - Star rating

Specifications:

• Engine Type: 4 - Stroke, 1 Cylinder
• Displacement: 139 cc (8.48 cu.in.)
• Bore & Stroke: 2.44" x 1.81" (62 x 46 mm)
• Full Throttle RPM Range: 4000 - 5000
• Alternator Output: 12V, 72W, 6A
• Dry Weight Range: 59 lbs
• Rated Power: 4 HP
• Fuel Delivery: Carburetor
• Steering Type: Tiller
• Shaft Length: 15", 20"
• Starting System: Manual
• Cooling System: Water - cooled with thermostat
• Ignition System: CDI
• Exhaust: Above propeller
• Lubrication System: Wet sump
• Oil Capacity: 0.6 L
• Trim Range: - 4° through +16°
• Tilt Range: 69°
• Gear Ratio: 2.08:1
• Gear Shift: F - N - R
• Standard Propeller Type: 3 - Blade Aluminum (7 1/2" x 7")
• Oil Pressure Alert: No
• Temperature Alert: No
• Rev Limiter: Yes
• Fuel Tank Capacity: 1.1 L (0.29 gal) internal, external tank capable (not included)
• Factory Warranty: 3 years. Warranty begins on date of purchase

Owner's Manual (4.18 MB)