Yamaha Midrange F70 Four Stroke

Print Full Specs

Weighing in at up to 80 pounds lighter than its four stroke competitors, this 16-valve SOHC (Single Overhead Camshaft) midrange four stroke offers the greatest power-to-weight ratio in its class. That makes it perfect for lightweight fishing boats, pontoons and fiberglass boats. In addition, it’s Command Link® and YCOP™ compatible.


Engine Type In-Line Four-Cylinder
Displacement 996cc (60.8 ci)
Bore x Stroke 65 x 75mm (2.56 x 2.95 in)
Prop Shaft Horsepower 70hp at 5800rpm
Compression Ratio 9.4:1
Fuel Induction EFI/SOHC/4 Valves Per Cylinder
Exhaust Through Propeller
Intake Single Throttle Valve
Ignition TCI Microcomputer
Spark Plug LKR7E-000-0000
Alternator Output 17 Amp
Starting System Electric w/PTT
Lubrication Wet Sump
Engine Oil Capacity 2.1L/ 1.9L without filter
Full Throttle RPM Range 5300 ~ 6300 rpm
Cooling Water/Thermostatic Control
Recommended Engine Oil Yamalube® 4M (See owner's manual)
Recommended Fuel Regular Unleaded (Minimum Pump Octane 87)
Recommended Fuel Filtration Yamaha Mini 10-Micron Fuel/Water Separating Filter (external)
Ethanol Blend Limit 10% Maximum
Gear Ratio (28:12) 2.33:1
Gear Shift Forward, Neutral, Reverse
Shaft Length L = 20"
Degree of Tilt 65°
Degree of Trim -4° through +16°
C.A.R.B. Rating 3-Star
Dry Weight 117 kg (257 lb)
Steering Angle (maximum) 40° from center, either direction
Warranty 3-Year Pleasure, 3-Year Government, 1-Year Commercial