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Yamaha Outboard 4- STROKE F25 MID-POWER

  • Yamaha Outboard 4- STROKE F25 MID-POWER
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Product Description

A proven 498cc two-cylinder, SOHC design features a new cylinder block and head. The pistons, connecting rods, and valves are the same as used in its F60 big brother, for added strength, responsive power and excellent fuel efficiency in a compact package. New electronics and a new micro-computer controlled ignition system mean dependable starting and consistent power, while an advanced air intake system drains away any water that enters the cowling during normal engine operation for long-term reliability. A streamlined intake manifold uses long tracks and smoother airflow, for reliable and responsive power with outstanding fuel efficiency.     

Specification :
Engine Type : Four stroke, In-Line 2-Cylinder with counter balancer
Displacement : 498 cc (30.4 ci)
Bore & Stroke : 65 x 75mm (2.56 x 2.95in)
RPM Range : 5000-6000
Compression Ratio : 9.4:1
Induction System : SOHC / 4 - valve
Alternator Output : 13 Amps
Fuel Delivery : Single Carburetor with accelerator pump
Starting : Electric or manual
Ignition : CDI Microcomputer
Lubrication : Wet sump
Degree of Trim/Tilt : Power Trim and Tilt or Manual with 2-position shallow drive
Exhaust : Through Propeller. Water-cooled, Labyrinth
Cooling : Raw water, Thermostatic Control
Gear Shift : F/N/R
Gear Ratio : 27/13 (2.08:1)

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