Yamaha Motor Corporation, U.S.A.
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Four Stroke Portable
Model HomeFeatures & BenefitsStandards & OptionsPerformance Bulletins
F20hp F15hp F9.9hp F8hp F6hp F4hp F2.5hp
Engine Type 2 cyl. 2 cyl. 2 Cyl. 2 Cyl. 2 cyl. 1 cyl. 1 cyl.
Displacement 22.1 ci (362 cc) 22.1 ci (362 cc) 12.9 ci (212 cc) 12.0 ci (197 cc) 12.0 ci (197 cc) 6.7 ci (112 cc) 4.4 ci (72 cc)
RPM Range 5000-6000 5000-6000 5000-6000 5000-6000 4500-5500 4000-5000 5250-5750
Alternator Output @ W.O.T. 10A 10A 6A ** 6A ** 6A ** N.A. N.A.
Compression Ratio 9.3:1 9.3:1 9.5:1 8.8:1 8.8:1 8.4:1 9.0:1
Fuel/Induction System SOHC SOHC SOHC SOHC SOHC OHV OHV
Lubrication Wet Sump Wet Sump Wet Sump Wet Sump Wet Sump Splash Splash
Ignition System CDI Micro Computer CDI Micro Computer CDI Micro Computer CDI Micro Computer CDI Micro Computer TCI TCI
Starting System Manual or Electric Manual or Electric Manual or Electric Manual Manual Manual Manual
Shaft Length 15 in., 20 in. 15 in., 20 in. 15 in., 20 in. 15 in., 20 in. 15 in., 20 in. 15 in., 20 in. 15 in.
Gear Ratio 13:27 (2.08) 13:27 (2.08) 13:27 (2.08) 13:27 (2.08) 13:27 (2.08) 13:27 (2.08) 13:27 (2.08)
C.A.R.B. Rating 3-Star 3-Star 3-Star 3-Star 3-Star 2-Star 2-Star
Weight* 114 lb (52 kg) 114 lb (52 kg) 91 lb (41 kg) 83 lb (38 kg) 83 lb (38 kg) 48 lb (22 kg) 37 lb (17 kg)
Warranty 3 Year Limited Pleasure Boat - 1 Year Limited Commercial 3 Year Limited Pleasure Boat - 1 Year Limited Commercial 3 Year Limited Pleasure Boat - 1 Year Limited Commercial 3 Year Limited Pleasure Boat - 1 Year Limited Commercial 3 Year Limited Pleasure Boat - 1 Year Limited Commercial 3 Year Limited Pleasure Boat - 1 Year Limited Commercial 3 Year Limited Pleasure Boat - 1 Year Limited Commercial

* Weight refers to shortest shaft length available.
** Consult your dealer for optional equipment.