Yamaha 4 Stroke Portable Outboard Engines

F40F

Our 747-cc 40-hp midrange provides powerful performance in a compact package that’s available in both propeller- and jet-pump-driven models.
Specifications:
Performance:
Max. prop shaft output 29.4 kW (40ps)
Full throttle operating
range
5000 - 6000 r/min
Idling speed 750 - 850 r/min
Max fuel consumption 13.6 L/h @ 5500 r/min
Engine:
Engine type SOHC, In-line 3
Displacement 747 cm3
Bore X stroke 65.0 x 75.0 mm
Compression ration 9.4:1
Starting enrichment Fuel injection
Fuel induction system Fuel injection
Alternator 17 A (battery charging: 13A)
Bracket /Drive:
Gear ratio 2.0 (26/13)
Propeller rotation Clockwise
Shaft length EHD, ET, ED, S, L, EHT:L
Engine transom height S:414 MM (16.3 inch), L:536 mm (21.1 inch)

F25G

Our 432-cc 25-hp portable outboard sports a new, streamlined, portable design and class-leading power-to-weight. In fact, it’s the lightest 25-hp outboard on the water—two-stroke or four-stroke.
Specifications:
Performance:
Max. prop shaft output 18.4 kW (25ps)
Full throttle operating range 5000 - 6000 r/min
Idling speed 850 - 950 r/min
Max fuel consumption 9.2 L/h @ 6000 r/min
Engine:
Engine type SOHC, In-line 2
Displacement 432 cm3
Bore X stroke 65.0 x 65.1 mm
Compression ration 9.3:1
Starting enrichment Fuel injection
Fuel induction system Fuel injection
Alternator 16 A
Bracket /Drive:
Gear ratio 2.08 (27/13)
Propeller rotation Clockwise
Shaft length MH, WH, E, W: S, L / WT: L, X / ET EHT: L / WHT, WHD:X
Engine transom height
S:424 mm (16.7 inch), L: 551 mm (21.7 inch), ET, WT:L 553 mm (21.8 inch),
X: 640 mm (25.2 inch)

F20B

The 432-cc all-new 20-hp portable outboard-built on the same award winning platform as the F25 and sharing its SOHC in-line design and streamlined intake manifold, delivers solid power.
Specifications:
Engine:
Engine type SOHC, In-line 2
Displacement 362 cm3
Bore X Stroke 63.0 x 58.1 mm
Max. Prop Shaft Output 14.7 kW (20 ps) @ 5500 r/min
Fuel induction system Carburetor
Engine Transom Height* S: 438mm or 443mm, L: 565mm or 570mm (*depending on model)
Dry Weight 51-61 kg
Starting System Electric Starter or Manual Starter (*depending on model)
Controls Remote Control or Tiller Handle (*depending on model)
Tilt System Manual Tilt or Power Tilt (*depending on model)
Lubrication System Wet Sump
Digital Network Not available

F15C

This two-cylinder, 362cc, four-stroke outboard is extremely fuel efficient, while producing a powerful and smooth-riding all-round performance. This engine includes Yamaha’s PrimeStartTM.
Specifications:
Performance:
Max. prop shaft output 11.0kW (15ps)
Full throttle operating range 5000 - 6000 r/min
Idling speed 1000 - 1100 r/min
Max fuel consumption 5.3 L/h @ 5500 r/min
Engine:
Engine type SOHC, In-line 2
Displacement 362 cm3
Bore X stroke 63.0 x 58.1 mm
Compression ration 9.3:1
Starting enrichment Prime start
Fuel induction system 1 carburetor
Alternator 10 A (Except MH)
Bracket /Drive:
Gear ratio 2.08 (27/13)
Propeller rotation Clockwise
Shaft length MH, EH, E: S, L, EP, EHP:L
Engine transom
height
S: 438 mm (17.2 inch), L: 565 mm (22.2 inch), EP: S: 443 mm (17.5 inch), EHP,
EP: L: 570 mm (22.5 inch)

FT9.9J

For all-round portability, power and performance, the F9.9 delivers well above its class. The 212cc, inline two-cylinder, four-stroke compact engine provides exceptional speed and acceleration for its size.
Specifications:
Performance:
Max. prop shaft output 7.3kW (9.9ps)
Full throttle operating
range
5000 - 6000 r/min
Idling speed 1000 - 1100 r/min
Max fuel consumption 3.9 L/h @ 5500 r/min
Engine:
Engine type SOHC, In-line 2
Displacement 212 cm3
Bore X stroke 56.0 x 43.0 mm
Compression ration 9.4:1
Starting enrichment Manual choke
Fuel induction system 1 carburetor
Alternator 6 A (Except MH)
Bracket /Drive:
Gear ratio 2.92 (38/13)
Propeller rotation Clockwise
Shaft length L, X
Engine transom
height
L: 552 mm (21.7 inch), X: 620 mm (24.4 inch), EP, EHP: L: 557mm 

(22.0 inch), EP, EHP: X: 625 mm (24.6 inch)

F8C

The 212cc, inline two-cylinder, four-stroke compact engine provides exceptional speed and acceleration for its size - delivering an ideal engine platform for small tinnies and inflatables.
Specifications:
Performance:
Max. prop shaft output 5.9kW (8ps)
Full throttle operating
range
5000 - 6000 r/min
Idling speed 1000 - 1100 r/min
Max fuel consumption 3.3 L/h @ 5500 r/min
Engine:
Engine type SOHC, In-line 2
Displacement 212 cm3
Bore X stroke 56.0 x 43.0 mm
Compression ration 9.4:1
Starting enrichment Manual choke
Fuel induction system 1 carburetor
Alternator 6 A with Rectifier regulator
Bracket /Drive:
Gear ratio 2.92 (38/13)
Propeller rotation Clockwise
Shaft length MH, E: L, X / EP:L
Engine transom height L: 552 mm (21.7 inch), X: 620 mm (24.4 inch), EP: L: 557 mm (22.0 inch)

F5A

Lightweight, compact and economical, Yamaha’s single-cylinder F5 portable has been designed to be ultra-easy to use and transport.

Specifications:
Performance:
Max. prop shaft output 3.7kW (5ps)
Full throttle operating
range
4500 - 5500 r/min
Idling speed 1450 - 1550 r/min
Max fuel consumption 2.0/h @ 5000 r/min
Engine:
Engine type OHV, 1-cylinder
Displacement 139 cm3
Bore X stroke 62.0 x 46.0 mm
Compression ration 8.9:1
Starting enrichment Manual choke
Fuel induction system 1 carburetor
Alternator 6 A with Rectifier regulator
Bracket /Drive:
Gear ratio 2.08 (27/13)
Propeller rotation Clockwise
Shaft length S, L
Engine transom height S: 435 mm (17.2 inch), L: 562 mm (22.2 inch)