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

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

This Mercury Mariner two stroke Workshop Manual/Repair manual covers the following years and model Outboard motors. 2.2 HP 4 HP 5 HP 8 HP 9.9 HP 20 HP 25 HP 35 HP. Mercury - Mariner Online Repair Manuals Available For Download: 1965-1989 Mercury and Mariner 2 To 40 Hp 2 Stroke. 1965-1989 Mercury Online Manual 40 115hp 2 Stroke. Maxim magazine pdf. 1986-1990 Mercury Online Manual 6/8/9.9/15HP 2 Stroke. 1995-2000 Mercury and Mariner 40 45 50 HP Online Manual. 1997-2000 Mercury and Mariner 40 50 55 60hp Online Manual 2 Stroke. 1997 1998 Mercury Optimax 200 & 225 HP Online Manual. View & download of more than 26 Mariner PDF user manuals, service manuals, operating guides. Outboard Motor, Speakers user manuals, operating guides & specifications. 2001-2005 Mercury/Mariner 2.5HP thru 225HP Repair Manual: 2001-2001 Mercury/Mariner 50/60 4-Stroke Repair Manual. 99-00 Mercury 4 HP - 5 HP & 6 HP Four Stroke Engines. 2000-2001 Service Repair Manual Year Application: 2000 & 2001 Mercury 75hp (75 hp) 90hp (90 hp) 4-Stroke (Four-Stroke-FourStroke) Outboard boat motor engine.

The sims 4 sim. 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

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!

A driver supporting quick menu is not installed windows 10. Prepare you fuel, oil on a bench or other suitable surface and have a clean rag and medium sized funnel handy. 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.

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Mariner 4 Hp Motor

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Mariner 4hp 2 Stroke Owners Manual

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