ace for thm both…iv been told u cant mix 4 stroke with petrol so I dont want too do that
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Look near the lower edge of the motor near the mower deck. Look for a round knob with two pencil eraser sized buttons on it, this is the oil fill. Unscrew it and add oil.

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Adding mixed gas to a four-stroke engine will not damage it when it is done in small quantities. Adding large amounts of mixed gas to a four-stroke engine may potentially gum up the spark plug and damage it and can also result in lowered performance; thus, it should be avoided.
The easiest way to tell a 2-cycle engine from a 4-cycle engine is the number of fuel tank and/or oil sump fill ports. A 2-cycle engine has one fill port with a cap that has fuel pump and oil can icon. The cap will usually state the oil to fuel mix ratio.
Four-stroke (four-cycle) engines are newer and have a separate compartment for oil, so you don`t have to worry about mixing fuel. These engines are more fuel-efficient and environmentally friendly, while also giving you more torque when you need it.
4-cycle engines are usually made to closer tolerances so having oil mixed with the fuel can gum them up and cause overheating. As long as you only add oil to the 2-cycle machine`s fuel, then you are fine.
Briggs and Stratton® engine oil is the only warranty certified engine oil recommended by Briggs and Stratton®. Briggs & Stratton® 10W-30 4-Stroke Engine Oil meets API SJ specification and approved for all weather use in all VANGUARD, INTEK, DOV professional series and other OHV 4-Stroke engines.
Unlike other four-strokes, the 4-MIX engine runs on a standard petrol-oil mix (1:50).
For a mixing ratio of 1 : 50 you need 5 litres of high-octane gas and 0.10 litres (100 ml) of STIHL two-stroke oil.
A 100ml bottle is suitable for mixing with 5 litres of fuel to achieve a 50:1 fuel-oil ratio.
As far as efficiency goes, the 4-stroke certainly wins. This is due to the fact that fuel is consumed once every 4 strokes. Four-stroke engines are heavier; they weigh upwards of 50% more than a comparable 2stroke engine.
4-stroke motors also have a crankcase and an oil distribution system that keeps the oil separate from the gas as it lubricates the engine components. Since the oil is separate, it also needs to be periodically changed—typically after every 25 hours of use.
If you pour 2-stroke oil into the oil fill on the 4-stroke engine, not much. It is probably a little thin and so it won`t lubricate as well as your engine manual might specify. I doubt you would notice for 1 oil change. If you keep doing it, you are likely under-lubricating the engine and that will increase wear.
Will Gas With 2 Cycle Oil Hurt A Lawn Mower? Using 2 cycle oil in a lawn mower that is designed to run on regular gasoline can be damaging to the engine. The 2 cycle oil can significantly reduce the lubrication of the engine, causing increased wear and tear on the moving parts of the engine.
If you pour 2-stroke oil into the oil fill on the 4-stroke engine, not much. It is probably a little thin and so it won`t lubricate as well as your engine manual might specify. I doubt you would notice for 1 oil change. If you keep doing it, you are likely under-lubricating the engine and that will increase wear.
Will Gas With 2 Cycle Oil Hurt A Lawn Mower? Using 2 cycle oil in a lawn mower that is designed to run on regular gasoline can be damaging to the engine. The 2 cycle oil can significantly reduce the lubrication of the engine, causing increased wear and tear on the moving parts of the engine.
Got a two-stroke engine? Any two-stroke motor oil made for air-cooled engines, such those in chainsaws, water pumps and weed eaters, will work perfectly in your two-stroke lawn mower engine.

Discover Relevant Questions and Answers for Your Specific Issue

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How do I mix two stroke engine fuel
ANSWER : Put oil in your petrol can add the exact amount of petrol put the cap on shake well use and store out of sunlight

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What is ment by 50 to 1 mix
ANSWER : 50 to one is a ratio of fuel to lubricating oil. Typically 50 parts petrol/gasoline to one part two stroke oil.

Oil typically comes in a special plastic bottle that incoporates a measure. Simply squeeze the right ammount of oil into the little chamber and add to 5 litres of gas.

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What is the fuel mix on a poulan 250 a – Poulan Super 250a Chainsaw Plate
ANSWER : 2 stroke fuel mix for hand tools id generally 50:1

100ml of oil in 5L of petrol

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Do i put an oil/gas mixture in gas tank? – Yard Machines 158cc Push Lawn Mower #11a 034f200
ANSWER : The 4 stroke engine only needs petrol in its tank . if your motor has a dipstick for oil it is a four stroke ,,only two strokes requires oil and petrol mix as they have no oil sump in their design

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Toro whirlwind push mower fuel mix
ANSWER : 4 stroke engine, no fuel oil mix.

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How to measure 2 stroke oil gas – Troy Bilt 31cc Quickshift Blowervac, Model No. Tb310qs
ANSWER : Depending on the mix of oil to gas you can purchase a small bottle to add to the gas. I believe it is 8oz. to a gal. of gas. This should give you approx. 50:1 ratio. Hope this helps.

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My Lawn mower seems to be produced by ALKO, but has the Briggs and Stratton emblem also. It is the 40b model and having just inherited it, I am trying to find out if I put just petrol in or whether I need an oil additive. If I need oil, which do I need? the mower works on unleaded, but not sure if this requires 2 or 4 stroke oil and at what mixture. Please help(aaaagggghhhh!!!!)
ANSWER : Hi scottcoles5…
The easy way to find out if the motor is 2 or 4 cycle is to check to see if the engine has oil in the crankcase…if it does it is a 4 cycle and you will NOT have to mix oil with your gas. 2 cycle engines do NOT have an oil in the crancase and depend on the oil you mix with your gasoline.
You can also check the color of the gasoline in the tank, most 2 cycle oils contain a colorant to color the gas to let you know there is oil in the gas…
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What is the oil/gas mix ratio? – Husqvarna , No.455 Rancher, 20" Gas – Powered Chainsaw
ANSWER : 50:1 ratio 2.6 fl oz of 2 stroke oil to 1 gal of fuel

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