• Need an Owner’s Manual for your Mercury Engine to perform maintenance, replace parts or just learn more about your engine? Mercury has made it easy for you to receive a free printed copy or to download and print your own copy. To order a printed version of the Service Manual for your particular Mercury Outboard or MerCruiser Engine, click here.
• This Force Outboard 40 hp 40hp 2 cyl 2-stroke 1992-1999 Service Manual Free Download is a complete factory service and repair manual for your Force Outboard 40 hp 40hp 2 cyl 2-stroke. This service manual covers all the manuals below.

Page 1 SERVICE MANUAL MODELS 40505560 With Serial Numbers United States 0G531301 and ABOVE Belgium.09974454 and ABOVE 1997, Mercury Marine 90-852572R1 JANUARY 1998 Printed in U.S.A.; Page 2 This service manual has been written and published the same locations whenever possible. Where the by the Service Department of Mercury Marine to aid fasteners are not satisfactory.

Proven Reliability.

Mercury's proven TwoStroke engines deliver easy starting, gutsy performance, and great all-round reliability. Across the range you’ll find an array of features that help keep your boating experiences more enjoyable and trouble-free. Features such as largest engine capacity displacement, giving you more low-end thrust, advanced carburettor design and fully-regulated, high output alternators powering all your marine electronics will ensure absolute boating excellence.

Mercury's proven TwoStroke engines deliver easy starting, gutsy performance, and great all-round reliability. Across the range you’ll find an array of features that help keep your boating experiences more enjoyable and trouble-free. Features such as largest engine capacity displacement, giving you more low-end thrust, advanced carburettor design and fully-regulated, high output alternators powering all your marine electronics will ensure absolute boating excellence. Super mario 3 mario forever download for mac.

Embracing Technology.

The simple TwoStroke design creates an engine that is less complex and lighter, with automatic low oil level warning for an added peace of mind.

Running Quality.

Electric CDI ignition delivers high voltage for quick, sure starts and added fuel efficiency. Innovative sound attenuator helps absorb engine sounds before they can reach the ear, resulting in a quieter running engine on the TwoStroke 40 hp and higher models.

50:1 100:1? Finding the right mix for your outboard.

Mercury 20 Hp Four Stroke

Why mix Fuel & Oil anyway?

Any outboard described as a 'two stroke' engine is an internal combustion engine than burins injected fuel through a reduced power cyle of just ignition and exaust (more info about the difference between two stroke and four stroke engines here. ) Due to this design it is necessary to provide the engine with lubrication (the oil) actually within the injected fuel (the petrol or gas). The relative proportions of these two components is called the 'fuel mix ratio'.

Getting the mix right

Mercury 40 Hp 2 Stroke

Every engine will have it's own fuel mix ratio, often mandated by power, intended use and age of the outboard and manufacters state this required mix ration and any tolerance (if there is any!) in the owners manual. Not running the right mix can cause poor starting, performance degradation, increase wear and tear and excessive smoke from the exhaust.

If however you don't have the original owners manual then you'll need to determine the right mix prior to use. Manufacturers often print the fuel mix ration on the inside or outside of the cowling, the fuel filler cap or sometimes embossed onto the fuel tank itself.

If all else fails a quick internet search of your outboard make, model and age will quickly reveal the required ratio. If you're absolutely stuck we recommend a mix of 50:1 for outboards older than 1980 and 100:1 for outboards manufactured since 1980. That is 50 parts fuel to 1 part oil and 100 parts fuel to 1 part oil respectively.

Mixing the Fuel

Mercury 40 Hp 2 Stroke Outboard Manual

Once you've landed on the ratio you need actually do the mixing.

Always store, handle and mix outboard engine fuel in a well ventilated space, ideally outdoors and away from any source of ignition of chance of contamination, i.e. not on the ground of some dusty car park!

Prepare you fuel, oil on a bench or other suitable surface and have a clean rag and medium sized funnel handy. Dolby audio driver windows 10 64 bit download. Aim to add the oil to the fuel rather than the other way around so have a suitable rounded number volume of fuel ready in a container (Starting with 5 Litres of petrol in a tank is ideal) and then added you two-stroke oil through the funnel mixing thoroughly.

Once you've finished mixing clean-up an spilt fuel or oil and make sure to commit to memory or note down which fuel tank has the mixed fuel ready to go.

2003 Mercury 40 Hp 2 Stroke Manual

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