Yamaha Motor Corporation, U.S.A.
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Two Stroke Portable
Model HomeBenefitsStds & OptionsGalleryPerformance Bulletins
25hp 15hp 9.9hp 8hp
Engine Type 2 Cyl. 2 Cyl. 2 Cyl. 2 Cyl.
Displacement 24.1 ci (395 cc) 15.0 ci (246 cc) 15.0 ci (246 cc) 10.1 ci (165 cc)
RPM Range 5000-6000 4500-5500 4500-5500 4500-5500
Alternator Output @ W.O.T. 6A ** 6A ** 6A ** 6A **
Compression Ratio 7.2:1 6.8:1 6.8:1 7.0:1
Fuel/Induction System Carb Loop Charged Carb Loop Charged Carb Loop Charged Carb Cross Flow
Lubrication 100:1 Premix 100:1 Premix 100:1 Premix 100:1 Premix
Ignition System CDI CDI CDI CDI
Starting System Manual or Electric Manual Manual Manual
Shaft Length 15 in., 20in. 15 in. 15 in. 15 in.
Gear Ratio 13:27 (2.08) 13:27 (2.08) 13:27 (2.08) 13:27 (2.08)
Weight* 105 lb (48 kg) 79 lb (36 kg) 79 lb (36 kg 60 lb (27 kg)
Warranty 2 Year Limited Pleasure Boat - 1 Year Limited Commercial 2 Year Limited Pleasure Boat - 1 Year Limited Commercial 2 Year Limited Pleasure Boat - 1 Year Limited Commercial 2 Year Limited Pleasure Boat - 1 Year Limited Commercial

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