Yamaha 4 Hp 2 Stroke Outboard Manual
Hi - I am the proud owner of a Fantasie 19 'Papillon' which came with an old (age unknown but I suspect 10 years +) Yamaha 4HP two stroke with long shaft. Being on a steep learning curve I knew that I needed 2 stroke oil to mix with the fuel - first question to you learned types - will standard Halfords 2 stroke oil do - this is labelled for all domestic/horticultural and gardening two strokes??? Next - any idea where I might find a manual for my outboard?
I suspect the fuel mix needs to be 100:1 but I'd like to check. You can access the owners manual to read online from although the site is really for models sold in the USA. I am unaware of a similar site for the UK! But first you will need to identify the year. You should be able to do that from If necessary look at what you think might be the manual for yours and you will find an illustration of the plate on the transom bracket that gives model/serial numbers and the year letter. Yamaha seem to have managed to continue with 100:1 fuel mixes while the main American makes returned to 50:1 mixes. I think you will find that Yamaha actually recommend 50:1 for the commercial versions of their engines.
If you use 100:1 measure the oil sufficiently accurately to be sure you do not use a thinner mix than 100:1. And yes do use an outboard engine oil to TCW-3 specification. The oils for gardening machinery are formulated for air cooled engines not cooler running water cooled outboards. TCW3 is also biodegradable. Your choice though whether to buy a mineral oil or pay more for a synthetic one. Later: If this is all new to you I strongly suggest that you check and/or replace your gear box oil. Any signs of milkiness indicates water ingress which will need rectifying.
Also if you are not aware when it was last changed consider replacing the water pump impeller, or at the very least keep a good eye on the cooling. I assume yours has a 'pee hole' telltale. Hi and welcome. Correct oil will be an outboard engine gear oil. An oil around SAE 85 or 90 in viscosity to GL5 spec but containing additional corrosion inhibitors to guard against the effects of water ingress. With the engine upright remove both screws to drain the oil.
If any signs of water or milkiness then there is probably a seal gone which should be replaced. Refill via the bottom hole until oil flows from the top one, using a squeezable bottle or a pump that fits the hole (Yamaha accessory) Refit the top screw, remove the pump and refit the lower screw. You should use new seals on the drain and level screws.
Water cooled as far as I know and expect. You dont give the year so cannot look anything up. Although strictly for American sold models you may be able to find an owners manual if more recent than 1998. That will tell you the location of the telltale if any. Not a smart idea to put you email address on the forum, suggest you delete it if not too late. Would also have been good etiquette to have started a new topic of your own rather than resurrecting an old one started by someone else.
Yamaha’s smallest Portables, the F6, F4 and F2.5, weigh in at as little as 37 pounds, with streamlined overhead-valve, one-cylinder designs. Their light weights, combined with built-in carrying handles, resting pads and an oil-leak prevention system for on-side storage capability create true portability. Add to that their efficiency, performance and reliability and these pint-sized powerhouses are perfect for all sorts of light duty, like hopping to the cuddy on a tender.
Yamaha 4 Hp 2 Stroke Outboard Manual
Wherever the day takes you, you can take along a little extra power with an F6, F4 or F2.5 Yamaha Portable. Convenience & Control Easy Storage Yamaha’s F2.5, F4, and F6 feature our Easy Storage Oil Retention System. 1995 isuzu rodeo repair manual. This pressurized oiling system prevents leaks, enabling on-side storage. Comfortable Control Incredibly nimble, the F6 and F4 feature 180-degree steering and the F2.5 features 360-degree steering with a dynamically balanced and dampened twist-grip throttle for comfort and convenient maneuverabilty. Portability and Storage Built-in front and rear handles make these lightweights easy to carry. Resting pads and an easy oil retention system allow for convenient on-side storage without cowling scuffs or oil leakage. Portable 6 hp Our 139-cc 6-hp portable is an impressive little outboard.
It boasts surprising features for such a small motor, like labyrinth exhaust and a long span mounting system for smooth, quiet power. It also offers the convenience an external fuel tank (in addition to its built-in tank) for extended range and added convenience.
Tiller-handle control with forward-neutral-reverse shifting and an ergonomic twist-grip throttle. Only 59 pounds (15” shaft model). Available in 15” and 20” shaft lengths. Solid 6-amp alternator (optional). Portable 4 hp Our 139-cc 4-hp portable outboard mirrors our OHV F6, with a couple less horses. It features the same ergonomic, easy-grip starter handle with a built-in decompression device for effortless starts. The F4 also features a built-in fuel tank with the option of switchable access to an additional external tank for amazing extended range.
Yamaha 2 Stroke Outboard Troubleshooting
There’s no stopping this little brute. Tiller-handle control with forward-neutral-reverse shifting and an ergonomic twist-grip throttle.
Only 59 pounds (15” shaft model). Available in 15” and 20” shaft lengths. Solid 6-amp alternator. Portable 2.5 hp Our 72-cc 2.5-hp portable outboard is the smallest motor on our roster, yet, it has some of the biggest news.
Completely redesigned, it’s even more portable, easier to store and cleaner burning. It recently achieved a Three-Star rating from the California Air Resources Board (C.A.R.B) for Ultra-Low Emissions and now meets emissions requirements in all 50 states.
Available for tiller-handle control with forward-neutral shifting, 360-degree steering and an ergonomic twist-grip throttle. Only 37 pounds (15” shaft model). Available in 15” and 20” shaft lengths. Engine Type 1 cyl Displacement 139cc Bore x Stroke 62 x 46mm (2.44 x 1.81in) Prop Shaft Horsepower 6hp at 5000 rpm Full Throttle RPM Range 4500 5500 Alternator Output at W.O.T. 6 Amp Compression Ratio 8.9:1 Fuel Induction System Carb Weight.
27 kg (59 lbs) - 28 kg (61 lbs) Recommended Fuel Octane 87 Recommended Engine Oil Yamalube® 4M (See owner's manual) Recommended Fuel Filtration N/A C.A.R.B. Rating 3-Star Exhaust Above Propeller Intake 2 Ignition CDI Spark Plug CR6HSB Alternator Output 6 Amp Starting System Manual Lubrication Wet Sump Engine Oil Capacity 0.6L Recommended Cooling Thermostatic Control Ethanol Blend Limit 10% Maximum Gear Ratio 2.08:1 Gear Shift Forward, Neutral, Reverse Shaft Length 15' - 20' Degree of Tilt 69° Degree of Trim -4° through +16° Dry Weight 15' shaft / 27 kg (59 lbs), 20' shaft / 28 kg (61 lbs) Mounting Centers N/A Steering Steering Angle (maximum) 90° from center, either direction Warranty Limited 3-Year Pleasure, 3-Year Government, 1-Year Commercial. Engine Type 1 cyl Displacement 139cc Bore x Stroke 62 x 46mm (2.44 x 1.81in) Prop Shaft Horsepower 4hp at 4500 rpm Full Throttle RPM Range 4000 5000 Alternator Output at W.O.T. 6 Amp Compression Ratio 8.9:1 Fuel Induction System Carb Weight. 27 kg (59 lbs) - 28 kg (61 lbs) Recommended Fuel Octane 87 Recommended Engine Oil Yamalube® 4M (See owner's manual) Recommended Fuel Filtration N/A C.A.R.B. Rating 3-Star Exhaust Above Propeller Intake 2 Ignition CDI Spark Plug CR6HSB Alternator Output 6 Amp Starting System Manual Lubrication Wet Sump Engine Oil Capacity 0.6L Recommended Cooling Thermostatic Control Ethanol Blend Limit 10% Maximum Gear Ratio 2.08:1 Gear Shift Forward, Neutral, Reverse Shaft Length 15' - 20' Degree of Tilt 69° Degree of Trim -4° through +16° Dry Weight 15' shaft / 27 kg (59 lbs), 20' shaft / 28 kg (61 lbs) Mounting Centers N/A Steering Steering Angle (maximum) 90° from center, either direction Warranty Limited 3-Year Pleasure, 3-Year Government, 1-Year Commercial.
Engine Type 1 cyl Displacement 72cc Bore x Stroke 54 x 31.5 mm (2.13 x 1.24 in) Prop Shaft Horsepower 2.5hp at 5500 rpm Full Throttle RPM Range 5250 5750 Alternator Output at W.O.T. N/A Compression Ratio 8.8:1 Fuel Induction System Carb Weight. 17 kg (37 lbs) - 20 kg (40lbs) Recommended Fuel Octane 87 Recommended Engine Oil Yamalube® 4M (See owner's manual) Recommended Fuel Filtration N/A C.A.R.B. Rating 3-Star Exhaust Above Propeller Intake 2 Ignition TCI Spark Plug CR6HSB Alternator Output N/A Starting System Manual Lubrication Splash Engine Oil Capacity 0.35L Recommended Cooling Thermostatic Control Ethanol Blend Limit 10% Maximum Gear Ratio 2.01:1 Gear Shift Forward, Neutral, Reverse Shaft Length 15' - 20' Degree of Tilt 79° Degree of Trim -4° through +16° Dry Weight 15' shaft / 17 kg (37 lbs), 20' shaft / 20 kg (40 lbs) Mounting Centers N/A Steering Steering Angle (maximum) 360° from center, either direction Warranty Limited 3-Year Pleasure, 3-Year Government, 1-Year Commercial.