Gas, 20 In. Bar, 46 CC, Chain Saw, UT10520

Need gas/oil mix for Homelite 330 10604A,
HJ 3120720

Thanks Mark S

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To the best of my recollection the 330 is an older model saw and should be running about a 16:1 ratio. 8oz. of oil to 1 gallon of fuel. Hope this helps.Note: You’re always better being a bit richer (lower ratio) than you are leaner (higher ratio).

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Yes. All gas-powered chainsaws need gas mixed with oil in order to work correctly. The mixed gas ensures the smooth operation of the engine by providing lubrication and reducing its temperature to manageable levels. This is achieved by mixing oil and gas in specific ratios.
For a 50:1 ratio of gas to oil, use 2.6 fluid ounces of oil per gallon of gas.
Use a 40:1 two-cycle oil mix ratio. One gallon of gasoline combined with 3.2 oz of two-cycle engine oil. Unsure of the age of your equipment?
NO, outboard two stroke motor oil designed for water cooled engines does not provide the needed protection or lubrication for two stroke air cooled engines.
A chainsaw uses bar-and-chain oil as it runs, and you`ll need to add about one tank of this each time you go through a tank of fuel. It`s easiest to keep up with your bar-and -chain oil by filling the reservoir every time you fill up the fuel tank.
Oil helps cool the piston and cylinder by keeping them evenly lubricated. Without lubrication, the metals can melt and potentially grate against each other, transferring metal to and from one another and permanently distorting them. Loss of engine power is a strong indicator that this has occurred.
These days, you`ll find two-stroke engines in all kinds of gas equipment, such as chainsaws, string trimmers, hedge trimmers and leaf blowers, largely because two-stroke engines have fewer moving parts, generate less heat and are in many ways more efficient for their size.
You can do that but I wouldn`t 40 to 1 means 40 parts of gas one part of oil. 50 to1 means 50 parts of gas to 1 part of oil. So the 40 to 1 mixture is more oily and provides better lubrication for your piston rings.
Most modern chainsaws, string trimmers, leaf blowers and other small-engine two-stroke equipment recommend a 50:1 oil mix ratio, but some recommend 40:1 and older two-stroke equipment might even call for 32:1.
The fuel and oil mixture should always be 2% (50:1).
100:1 – Mix 50ml of oil per 5ltrs of fuel.

Recommended by Yamaha and Suzuki for most of their small two stroke engines up to about 30hp, this ratio requires the least amount of TCW3 two stroke oil. The result of using this ratio (less oil) is reduced spark plug fouling and less smoke.

One final note: This article recommends using vegetable oil to replace chain oil in chainsaws. However, this does NOT mean replacing “mix” oil which is used for the gas mix. For mix oil, you must use the petroleum-based 2-stroke mix oil recommended by the chain saw manufacturer.
So in short, chainsaws use 2-stroke engines because:

They are smaller and lighter. They offer higher speed and acceleration. 4-stroke engines can`t function properly if you turn them sideways or upside down.

The short answer is yes, you can use E10 petrol with Stihl petrol tools. However, we do recommend reading to the bottom of this page for all the information. Stihl recommend using their MotoMix pre-mixed fuel if you have any doubts about high ethanol content fuel such as E10.
Gaskets, fuel lines and the fuel tank itself could be damaged if the incorrect oil is used. It should now be clear that you should only ever use 2-cycle engine oil with your chainsaw*. Anything else will probably wreck it so, no you cannot put ordinary car oil in it!
Yes. It won`t harm your engine to mix, for example, Quaker State® motor oil with Pennzoil, as long as the oil you use is the weight (or viscosity) recommended in your vehicle owner`s manual.
Don`t use automobile motor oil for your gas mixture. Use only two-cycle engine oil. Automobile motor oil contains noncombustible additives that will foul your two-cycle engine.
Unlike a four-stroke engine, a unique feature of a two-stroke engine is that they do not have an internal oil reservoir. Instead, two-stroke engines require the owner to mix oil into the fuel at a predetermined ratio in order to ensure the engine receives adequate lubrication during operation.
STIHL currently recommends that you do not store or use fuel older than 60 days, and preferably no longer than 30 days, even with a stabilizer. Read more about storing your outdoor power equipment.
1. Engine size is measured in cubic centimeters (cc) or cubic inches. In general, the bigger the number, the more powerful the engine. Most homeowners will do fine with a saw in the 32 cc to 45 cc range.
Modern gasoline chainsaws run at 50:1 mixture, 50 parts gasoline to 1 part oil. Older chainsaws can require 16:1 mixtures or 32:1 (most common). Two-stroke engines are much more efficient now, as well as having cleaner combustion. At most automotive stores, pre-mix fuel can be bought in 50:1 and 40:1 mixtures.
TruFuel 50:1 mix is designed to work with outdoor power equipment that requires a 50:1 gas to oil ratio. TruFuel 2-cycle fuel is ethanol-free and formulated for hotter-running, higher-revving small engines. That means your 2-cycle equipment will run smoother and stronger with fewer false starts.
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.
The stoichiometric mixture for a gasoline engine is the ideal ratio of air to fuel that burns all fuel with no excess air. For gasoline fuel, the stoichiometric air–fuel mixture is about 14.7:1 i.e. for every one gram of fuel, 14.7 grams of air are required.

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Do I need gas and oil mix – Poulan Super 250a Chainsaw Plate
ANSWER : I think Poulan uses a 40:1 ratio to one gallon of gas, however I have always used 50:1 the same as my sthl saws with no issue. I would rather have more oil mix that to little.

I have a Homelite YARD BROOM II 170 mph Blower.what is the oil to gas ratio?
ANSWER : I usually mix at 50:1 useing klotz two stroke oil,or 44:1,klotz is high performance zynthetic oil,also has nice sweet smell when running,keeps the neighbors from complaints on bad smell.

Do you mix gas and oil in this trimmer – Ryobi 30 Cubic Centimeter Curved Shaft Gas Trimmer
ANSWER : Yes. Verifythe ratio, either 40:1 or 50:1

I have a Yard Broom 2 170 mph blower. what is the oil- gas mixture ratio?
ANSWER : The proper mix for this blower is 40:1

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ANSWER : 40:1 gas to oil ratio.

Oil-gas ratio – Homelite ZR10926 16 Chain Saw
ANSWER : Hi. 50 to 1.

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ANSWER : 50:1 don’t use outboard motor mix

Is it straight gas or mixed? – Poulan Pro 14" Gas Chainsaw 33CC P3314
ANSWER : It uses a gas/oil mix. 40:1Hope this helps.