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2018 Yamaha F90 20 in Shaft Outboard Motor

  • 2018 Yamaha F90 20 in Shaft Outboard Motor for sale
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Product Description

2018 Yamaha F90 20 in Shaft Outboard Motor


The F90 is a 4-stroke, 4cylinder 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. 

Precise Trolling Control: 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. 

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

Single Throttle Valve: 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.


2018 Yamaha F90 20 in Shaft Outboard Motor




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.


Engine Type: 4-cylinder

Displacement: 1596 cc (97 ci)

Bore & Stroke: 79 x 81.4 mm (3.11 x 3.2 in.)

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 deg. through +16 deg./70 deg.

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.)


Shaft Length: 20 in.

Dry Weight: 166 kg (366 lb.)



Engine Type


Bore x Stroke

79 x 81.4 mm (3.11 x 3.2 in.)


1596 cc (97 ci)




Shaft Length

20 in.


166 kg (366 lb.)


Full Throttle Operating Range

5,000 - 6,000 rpm

Gear Ratio / Shift

11:25 (2.27) / F/N/R

Fuel Induction



25 Amps


Water/Thermostatic Control



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