What is the oil ratio for a Mercury outboard motor? (2023)

What is the oil to gas ratio for a 2-stroke Mercury outboard?

For 2-Stroke outboards that require a 50:1 premix of oil/gas we've put together the following chart to simplify the calculations. Use ONLY 2-stroke outboard motor oil with an NMMA (National Marine Manufacturer's Assoc.) certified rating of TCW3. Never use automobile motor oil in your 2-stroke outboard!

For a 50:1 ratio of gas to oil, use 2.6 fluid ounces of oil per gallon of gas. For a 40:1 mixture, use 3.2 fluid ounces of oil per gallon of gas.

Excess oil can produce a smoky exhaust, oil leaking out of the muffler, and sometimes loss of power. While not ideal, these issues can be fixed by simply replacing the fuel in the tank with properly mixed fuel.

For 2-Stroke outboards that require a 50:1 premix of oil/gas we've put together the following chart to simplify the calculations. Use ONLY 2-stroke outboard motor oil with an NMMA (National Marine Manufacturer's Assoc.) certified rating of TCW3. Never use automobile motor oil in your 2-stroke outboard!

Most 2-stroke chainsaws recommend a 50:1 chainsaw oil mix ratio. But some recommend 40:1. Older two-stroke equipment might even call for 32:1.

OptiMax/DFI 2-Stroke Outboard Oil

A synthetic blend 2-Cycle engine oil specifically formulated and developed to meet the needs of OptiMax and Direct Fuel Injected (DFI) 2-cycle outboard engines.

50:1 Fuel to oil ratio easy way to calculate - YouTube

40:1 Fuel to oil ratio easy way to calculate - YouTube

If do not know what it is, 40:1 is accepted as an standard ratio for two-stroke engines. This is 25mls of two stroke oil to 1L of petrol.

2-STROKE OUTBOARDS (CARBURETED)

During the break-in period you should use a 25:1 oil/fuel mixture (1000 mL of oil for every 25 liter of gas).

How do you know if 2-stroke is lean or rich?

keeping the engine under a light load (you will only be opening the throttle to 1/2 or so) If the needle is set too rich you will hear a sputtering like the choke is on and the acceleration will be slow. If the clip position is too lean the engine will sound quiet and have a “dead” feeling possibly hesitating.

Lean means there's not enough gas, and gas cools the engine. Running lean is bad because it can overheat and damage the engine. Jetting on the lean side is good for crops throttle response and maximum horsepower, but under hot and extreme conditions it will create too much heat.

50:1 - Mix 100ml of oil per 5ltrs of fuel.

Recommended by Mercury, Mariner, Tohatsu, Johnson and Evinrude this is my preferred ratio for all outboards including Yamaha and Suzuki. You can confidently use this ratio for any horse power and just about all year models.

Common gasoline and oil mix ratios are 50:1 and 40:1. Meaning there is 50/40 parts gasoline to one part oil when mixed. The lower the mix ratio number the more oil per volume in the gasoline. To mix properly add oil to your gas can, then add fresh gasoline from the pump.

This ratio indicates how much fresh, regular unleaded gasoline (containing no more than 10% ethanol) to mix with how much oil. For all Remington 2-cycle products, the ratio is 40:1. This means you'll want to add 3.2 oz of oil to every gallon of gasoline.

You can't use 10w 30 instead of 2-stroke oil. That type of oil is for 4-stroke engines.

Twenty to one (20:1) is one of the easiest 2 stroke ratios to calculate, you simply multiply the litre amount by 5 and add a zero.

There are several 2 cycle oil substitutes. 4-stroke oil is the best substitute, but motor oil, marine oil, and vegetable oil can be good alternatives.

For engines, synthetic is better. Here's why. Conventional motor oils can lead to carbon buildup on pistons, in the combustion chamber, and on the back of the throttle blades, all of which can lead to engine noise, reduced power, and drivability issues.

Unleaded Gasoline 98 (SP98) is composed of 98% octane and only 2% heptane. Manufacturers recommend this fuel for all these 2-stroke boat engines without explicitly preferring it to SP95. Bearing for marine mechanics, the choice is clear! 98 unleaded gasoline is the best choice for a 2-stroke boat engine.

Is Quicksilver oil the same as Mercury?

The two brands share the same DNA and same brand promise. The main differences between the two brands is where they are sold and the larger breadth of products available under the Quicksilver brand. Mercury products are sold only by Mercury Marine dealerships.

OWR is calculated directly from the retort analysis of an oil mud. For example, if a mud contains 60 vol% oil and 18 vol% water, the oil percentage is [60/(60 + 18)]100 = 77% and the water percent is [18/(60 +18)] = 23%. That OWR is written as 77/23.

Measuring 2.6 oz of 2 Cycle Oil - YouTube

Divide 1 by the total number of parts (water + solution). For example, if your mix ratio is 8:1 or 8 parts water to 1 part solution, there are (8 + 1) or 9 parts. The mixing percentage is 11.1% (1 divided by 9). Need another example?

A ratio of 24 to 1 can be written as 24 to 1, 24:1, or 24/1. Furthermore, 24 and 1 can be the quantity or measurement of anything, such as students, fruit, weights, heights, speed and so on. A ratio of 24 to 1 simply means that for every 24 of something, there are 1 of something else, with a total of 25.

In that case there are 128 fluid ounces in a gallon, divide that by 32 and you get 4 ounces of oil needed.

Lean Fuel Mixture Effects on 2 Stroke Cycle Engines - YouTube

Synthetic 2-stroke oil products have lower deposits and emissions largely to having a lower ash content, and some, like AMSOIL recommend leaner mixtures (so you use less). For these reasons, a number of manufacturers now recommend synthetic oil for 2-stroke engine use.

2 stroke oil is good and can be used for chainsaw oil as a good option. However, not all 2 stroke oils can be used for chainsaws because some of these oils are not suitable for the engine of the chainsaw. Thus, it can damage the engine and you may have to pay large for a small mistake.

Can you use normal 2 stroke oil in an outboard?

Outboard Engine Oil. A frequent question we answer at DHS Equipment, is about oil for 2-cycle engines. Many people ask, "can I use outboard engine oil in my 2-cycle equipment?" This has been debatable for years, but the short answer is, no, you should not.

Using quality oil will go a long way to drastically reduce the amount of smoke your motor pumps out. Try using synthetic oil. Evinrudes ETEC XD-100 is well known to nearly eliminate smoke due to oil combustion. While it is expensive, it is a small price to pay for a more pleasant day on the water.

Burning 87-octane gasoline in a two-stroke outboard causes carbon buildup that shortens engine life. Dose the fuel with a carbon-cleaning additive or fill the tank with 89-octane or higher fuel.

Lean Air/Fuel Mixture

Not only can a rich air/fuel ratio cause a backfire, a mixture that doesn't have enough gasoline can cause a backfire, too. A "lean" mixture is one that doesn't have enough fuel, and too much air.

Four stroking will occur in a correctly adjusted two stroke engine at full throttle without load when the air-fuel mixture becomes overly rich and prevents the engine from running faster.

If the carburetor is supplying an air/fuel mixture that is too rich, the engine may tend to load up, foul the spark plugs, run sluggish and lack power.

Q: Is it better to run the too lean or rich engines? An engine running slightly rich will give more power, but running lean will cause catastrophic engine damage. Running too rich can also cause severe damage to your engine.

Re: what do rich and lean sound like? A rich condition will result in excessive smoke from the silencer, the plug will often carbon foul and the engine will produce a sputtering/crackling sound. A lean condition will result in slow throttle response, you twist the throttle but the power delivery is lethargic and flat.

There are two common types of bogging: lean bog and rich bog, distinguishable by how the bike sounds when you throttle. Lean Bog - Happens when there's too much air and not enough fuel in the engine. A lean bog is noticeable when the bike doesn't accelerate, and sounds like the engine is drowning out or dying.

For 2-Stroke outboards that require a 50:1 premix of oil/gas we've put together the following chart to simplify the calculations. Use ONLY 2-stroke outboard motor oil with an NMMA (National Marine Manufacturer's Assoc.) certified rating of TCW3. Never use automobile motor oil in your 2-stroke outboard!

Should I run premium gas in my outboard?

Current recommendations are to use a minimum of 87 octane, 89 octane is preferred. There is no additional benefit from using higher-octane fuels, in fact they may cause hard starting conditions in hot weather.

For 5 gallons of gas, with a 50:1 ratio, the amount of oil required is 12.8 US ounces (100 ml). Experts agree that it is better to err toward the side of too much oil, rather than not enough. Typical break in period ratios are about twice the normal; 50:1 is generally 25:1 during break in.

Unlike other four-strokes, the 4-MIX engine runs on a standard petrol-oil mix (1:50). A completely new feature is that the petrol-oil mix is distributed through the engine via a bypass channel in the cylinder head for complete lubrication.

A: 25 :1 ratio is 25 fluid ounces of gas per 1 fluid ounce of oil. So divide the total amount of fluid ounces of gas by 25 to find the amount of oil to add. 10 gallons X 128 fluid ounces per gallon = 1280 fluid ounces. 1280 / 25 = 51.2 fluid ounces of oil to add to 10 gallons to achieve 25:1 mixture ratio.

Most 2-stroke chainsaws recommend a 50:1 chainsaw oil mix ratio. But some recommend 40:1. Older two-stroke equipment might even call for 32:1.

Use a 40:1 two-cycle oil mix ratio. One gallon of gasoline combined with 3.2 oz of two-cycle engine oil.

You want to mix 2.6 ounces of oil to one gallon of gasoline for a 50:1 mixture. If you're mixing up two gallons of gasoline you will have to mix 5.2 ounces of oil to two gallons of gasoline for a 50:1 mixture.

This ratio indicates how much fresh, regular unleaded gasoline (containing no more than 10% ethanol) to mix with how much oil. For all Remington 2-cycle products, the ratio is 40:1. This means you'll want to add 3.2 oz of oil to every gallon of gasoline.

How much oil do you mix with gas?

All STIHL gasoline-powered equipment uses a 50:1 gas and oil mixture.

For 5 gallons of gas, with a 50:1 ratio, the amount of oil required is 12.8 US ounces (100 ml). Experts agree that it is better to err toward the side of too much oil, rather than not enough. Typical break in period ratios are about twice the normal; 50:1 is generally 25:1 during break in.

Can I Use Engine Oil for 2-Stroke Mix? Engine oil and motor oil don't lubricate as much when they're exposed to gasoline. You can use engine oil temporarily, but it will cause the parts to grind together with constant use. Engine oil also creates more pollution than 2-stroke oil, which burns clean.

Measuring 2.6 oz of 2 Cycle Oil - YouTube

There are several 2 cycle oil substitutes. 4-stroke oil is the best substitute, but motor oil, marine oil, and vegetable oil can be good alternatives.

There are 128 fluid ounces in 1 gallon.

An Easy Gas to Oil Mixture Calculation

Most two-stroke engines that are used for boats require a 50:1 ratio although there are a number of exceptions.

A: 25 :1 ratio is 25 fluid ounces of gas per 1 fluid ounce of oil. So divide the total amount of fluid ounces of gas by 25 to find the amount of oil to add. 10 gallons X 128 fluid ounces per gallon = 1280 fluid ounces. 1280 / 25 = 51.2 fluid ounces of oil to add to 10 gallons to achieve 25:1 mixture ratio.

How do you mix 2 stroke gas?

How to Mix Oil and Gas: The 2-Cycle Engine Fuel Recipe - YouTube

If you need a 50:1 gas and oil mixture, for one gallon of gas, use 2.6 fluid ounces of oil. For 2.5 gallons of gas, use 6.4 fluid ounces of oil. For 5 gallons of gas, use 12.8 fluid ounces of oil.

No, you can't use any 2-stroke oil in your chainsaw. Some 2-stroke oils are built for motor oils, and this might damage your chainsaw. Also, 2-stroke oils for an air-cooled engine are different from a water-cooled engine.