F90

The F90 is a 4-stroke, 4-cylinder outboard that offers you the perfect blend of power, versatility, efficiency and ease of use. And it’s amazingly clean: it’s got a three-star CARB rating and exceeds emissions standards.

 

Adjust trolling speeds in 50-rpm increments simply by pushing a button on the optional Command Link tachometer or the VTS – switch on the optional multifunction tiller handle.

 

The overhead camshaft design efficiently exchanges intake and exhaust gases for responsive power and fuel efficiency.

 

Air entering the engine block is routed through a single throttle valve, to ensure the precise amount of air necessary for optimum power and fuel efficiency. It then enters each cylinder through individual long intake tracks, which are “pulse tuned” to provide air at the precise volume and timing for maximum density and power.

Description

OPTIMAL FUEL/AIR MIX

Multi-port precision electronic fuel injection on the F90 delivers the optimal fuel/air mix to each cylinder.

VARIABLE TROLLING SYSTEM

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!

HIGH AND DRY

A top-mounted flywheel keeps sensitive electrical components out of the water.

OPTIMUM PERFORMANCE

An ECM (Engine Control Module) adjusts timing to maintain optimum engine performance, economy and reliability in all conditions.

FEWER MOVING PARTS

The double overhead cam design on the F75 and up features fewer moving parts compared to a conventional single overhead cam design for greater reliability.

MULTI-FUNCTION TILLER HANDLE

Available on F30 through F60, and optional on F75 through F115, the multi-function tiller handle gives you fingertip control of starting, shifting, steering and throttle.

Additional information
ENGINE

Engine Type
4-cylinder
Displacement
1596cc (97ci)
Bore & Stroke
79×81.4mm (3.11×3.2in)
RPM Range
5000-6000
Compression Ratio
9.6:1
Induction System
DOHC
Alternator Output
25 Amps
Fuel Delivery
EFI
Starting
Electric
Ignition
TCI microcomputer
Lubrication
Wet sump
Degree of Trim/Tilt
-4° through +16°/70°
Exhaust
Through Prop
Cooling
Water/Thermostatic Control
Gear Shift
F/N/R
Gear Ratio
11:25 (2.27)

FUEL & LUBRICATION

Recommended Fuel
Regular Unleaded (Minimum Pump Octane 87)
Recommended Oil
Yamalube 4-M FC-W 10W-30 or 20W-40
Oil Capacity
4.5L (4.8 qt)

GENERAL

Shaft Length
20" – 25"
Dry Weight
166kg (366 lb)