Maximum enjoyment. Minimum emissions.
Yamaha's Electronic Fuel Injection system (EFI) ensures cleaner performance and efficient consumption of fuel, all in an engine that delivers impressive power, serious torque in the mid-ranges and high top speeds.
The 50hp also includes a number of unique Yamaha features, each designed to provide a smooth, comfortable and enjoyable ride. Among them are the Wide Range Power Trim & Tilt system, giving you full, relaxed control – and PrimeStart™ ignition – as effortless as starting a car.
IMFO
Ultra-smooth 4-cylinder refinement - with EFI
Whether strokes or cylinders, Yamaha understands the power of Four! Which is how the world's pioneer in 4-stroke technology has brought added refinement to the 4-cylinder configuration with a powerful long stroke design for the EFI-equipped 50hp - to deliver ultra-smooth, useable power with low noise and vibration levels.
Digital network gauges
The 50hp is compatible with our Digital Network Gauges, which deliver the information needed to maximise engine performance and efficiency, including a Multifunction Tachometer with RPM, Hours Run, Trim Angle, Oil Pressure, Warning lamps and Variable RPM control - and a Speed/Fuel Management Gauge with Speed, Tank Capacity and Fuel Economy.
Variable trolling RPM control
With the press of a button on the optional Digital Network's Tachometer – or via the variable trolling RPM switch on the optional multi-function tiller handle – the driver can adjust the engine speed for relaxed trolling, in precise steps of 50 RPM, between 620 and 900 RPM.
Wide Range Power Trim & Tilt
Discover the versatility and power of a Yamaha engine. Quick response, via push-button control, makes trim and tilt adjustments swift, smooth and easy across a wide trim range. The negative trim settings are particularly useful to improve acceleration and bring the boat onto the plane quickly.
Compact shape and solid one-piece top cowling
With the advanced design and modest overall dimensions of this 4-cylinder unit, our engineers have produced a remarkably compact 996cc powerhouse, but with a low weight that is comparable to a conventional 3-cylinder engine. So the 50hp has a power-to-weight ratio that makes it the ideal choice for a wide range of boats.
Yamaha Customer Outboard Protection (Y-COP) option
The optional Y-COP immobiliser system is simple, easy to use and highly effective – a neat and simple remote control locks and unlocks the engine at the push of a button. This prevents your outboard engine being taken for any unauthorised joyrides, offering you peace of mind when leaving your boat unattended.
Advanced warning systems
Yamaha engines are renowned for their reliability and how well they hold their value. The comprehensive warning systems on this engine measure oil pressure, engine temperature and other key variables to provide clear audio/visual warnings of any problems. If a fault occurs, RPM are automatically reduced, to protect your engine as you head for shore.
Specifications Engine type
4-stroke
Displacement
996 cm³
Number of cylinders / configuration
4/In-line, SOHC
Bore x stroke
65.0 mm x 75.0 mm
Prop shaft output at mid range
36.8 kW / 5,500 rpm
Full throttle operating range
5,000 - 6,000 rpm
Lubrication system
Wet sump
Fuel induction system
EFI
Ignition / advance system
TCI
Starter system
Electric with Prime Start™
Gear ratio
1.85 (24:13)
Transom height L527 Fuel tank capacity
separate, 25litres
Oil pan capacity
2.1litres
Weight without propeller
107 kg - 114 kg
Control
Remote Control Trim & Tilt method
Power Trim & Tilt (ET), Hydro tilt assist (ED) Light coil / alternator output
12V -16Awith rectifier/regulator Engine immobilizer
Y-COP optional Propeller
Optional Variable trolling speed
With DN Gauges or m-f tiller handle Remark
The kW data in this sheet is based on the ICOMIA 28 standard, measured at the prop shaft
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COMMENTS
- My rpm's are too low at idle to keep it running, stalls out after I push choke lever down. How can I adjust for higher idle?- i have a 1985 yamaha 50hp 4 stroke ....i can run it max or even half speed for over 2 hours with not issues.water comes out and always have green oil light on...but when trolling for 20 min or more the alarm will sound in the throttle control box ..i have to turn it off for aprox 10 min then i can go again for a bit.why is it over heating i have a steady flow of water pissing out the back of the motor ..green light all times.i am running yamalube 1 which is what they recommend in the manual.intake vents are clear nothing blocking water flow.and exhaust is coming out fine,.please help and ty in advance
- Bro I've been struggling with he same engine in the video to get it to run like this but can't tried everything can u help
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