The Yamaha F90 features a 16-valve, Double Overhead Camshaft (DOHC) design for incredible acceleration, and Precision Multi-Point Fuel Injection for reliable starts and outstanding fuel efficiency. The F90 is the only Yamaha Mid-range with an optional 25-inch shaft.
The F90 is a clean, quiet and fuel-efficient 4-stroke, 4-cylinder beauty that’s packed with power, versatility and legendary Yamaha reliability and it features Electronic Fuel Injection. Power trim and tilt let you max your acceleration and top-end speed.
MULTI-PORT PRECISION ELECTRONIC FUEL INJECTION, on the F90, delivers the optimal fuel/air mix to each cylinder.
VARIABLE TROLLING SYSTEM, on the F90. The tiller handle models come standard with Yamaha’s Variable Trolling Speed feature, allowing the operator to stay on the fish by selecting the preferred rpm, (in 50 rpm increments), within a range of 620-900 rpm!
TOP-MOUNTED FLYWHEEL keeps sensitive electrical components out of the water.
ENGINE CONTROL MODULE adjusts timing to maintain optimum engine performance, economy and reliability in all conditions.
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Four Stroke Engine Design * Powerful 4-Cylinder 97 cu in.* Multi-Point Precision Fuel Injection * Four Independent Fuel Injectors * DOHC * 4-Valves Per Cylinder * Long Track Induction System * Compact, Lightweight Design * Labyrinth Exhaust
Power Trim & Tilt * Freshwater Flush * External Tilt Switch * Easy Maintenance * New Style Rigging Grommet
Single Throttle Valve * Direct Drive System * TCI Microcomputer * Wet Sump Lubrication * Engine Warning System * Sacrificial Anodes * YDC 30 Aluminum Alloy * ACP 221 Paint Process * Electro-deposited Paint Process * Top Mounted Electrical * High Output Alternator * SST Drive, Prop, Shift Shafts * SST Steering Tube * Magnetic Drain Plug
F90 ENGINE SPECIFICATIONS
Type In-Line 4 Cylinder * Displacement 97 ci (1596 cc) * Bore x Stroke 79 x 81.4mm (3.11 x 3.20in) * Prop Shaft Horsepower 90hp @ 5500rpm * Compression Ratio 9.6:1 * Fuel/Induction System EFI (DOHC) * Exhaust Through Propeller * Intake Single Throttle Valve * Ignition System TCI Microcomputer * Alternator Output 25A * Starting System Electric * Lubrication Wet Sump * Engine Oil Capacity 3.7L/3.5L w/without filter * Full Throttle RPM Range 5000 – 6000 * Cooling Water/Thermostatic Control * Gear Ratio (25:11) 2.27:1 * Gear Shift Forward, Neutral, Reverse * Shaft Length L = 20″ X = 25″ * Degree of Tilt 70° * Degree of Trim -4° through +16° * C.A.R.B. Rating 3-Star * Dry Weight 25″ shaft ~ 372 lbs; 20″ shaft ~ 366 lbs. * Steering Angle (maximum) 35° from center, either direction
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