One of the most common questions soon-to-be chainsaw owners have is about the engines chainsaws have. Chainsaws that run on gasoline all have 2-stroke engines, except some STIHL chainsaws that have a hybrid engine that is essentially 4-stroke, but still uses the same petrol-oil mix as 2-stroke engines. As I’ve mentioned earlier some of their chainsaws have their new 4-MIX engine, but it uses the same mixed fuel 2-stroke engines do.
When the engine speeds up, the centrifugal plates in the clutch spin outward to engage the clutch, and the chain begins running. The gas tank holds about 1 pint of gasoline mixed with two-stroke engine oil. A two-stroke engine, as explained in How Two-stroke Engines Work, has no valves or cams and generates power on every rotation of the crankshaft.
In a 4-stroke engine, on the third stroke, oil is taken from a special oil reservoir and brought into the engine to lubricate it. Since there is a separate oil reservoir and a stroke dedicated to lubrication, there is no need to mix oil into the gas the engine runs on. Quite separately from engine oil, chainsaws need oil for chain lubrication.
is a chainsaw a two stroke engine Related Question:
Is a chainsaw a 2-stroke?
Chainsaw engines come as either 2-stroke or 4-stroke versions. Sometimes these are also referred to as 2-cycle and 4-cycle engines – it’s the same thing.
How do I know if my chainsaw is 2-stroke or 4 stroke?
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. A 4-cycle engine has two fill ports with each cap separately identifying the fuel tank from the oil sump.
What kind of motor is in a chainsaw?
Chainsaw engines are traditionally either a two-stroke gasoline (petrol) internal combustion engine (usually with a cylinder volume of 30 to 120 cm3) or an electric motor driven by a battery or electric power cord.
Is a STIHL chainsaw a 2-stroke?
2-stroke engines such as STIHL petrol Chainsaws run off a mix of petrol and engine oil. STIHL Chainsaws use a mixing ratio of 1 part oil to 50 parts petrol, which is 20 mls of oil per litre of petrol. If you are using any other brand please mix at 25:1 or 40 mls per litre.
Are all Husqvarna chainsaws 2-stroke?
All Husqvarna chainsaws use the ratio of 50:1, this means that for every gallon of gas you will use 2.6 oz. of 2 stroke engine oil. Even though your owner’s manual may say 87 octane, always use 89, just to be safe, and to prevent “knocking” which could be damaging to your engine.
How many strokes is a chainsaw?
It has an air-cooled two-stroke gasoline engine. The chain is driven by a centrifugal clutch. When the engine is idling, the clutch is disengaged. When the engine speeds up, the centrifugal plates in the clutch spin outward to engage the clutch, and the chain begins running.
Are McCulloch chainsaws 2-stroke?
2 Stroke Oil | Chainsaw Oil | McCulloch.
Is a lawnmower 2-stroke?
Most lawnmowers were 2-stroke engines, but in recent years 4-stroke engine lawnmowers have become much more popular as they are more environmentally friendly. The easiest way to check what type of engine a lawnmower has is by checking its fuel tank.
What makes a chainsaw powerful?
Chainsaw Buying Considerations and Cost For DIYers, the primary consideration is power and usage. A more powerful saw will require a gas motor, while a less powerful, more mobile one can be driven by an electric motor.
How do chainsaw motors work?
Chainsaws use a centrifugal clutch, which automatically engages when the engine spins at high speed (when the saw is actually chopping wood) and disengages when it’s running more slowly (idling, in other words). A centrifugal clutch is really simple and consists of just a few parts.
Who makes STIHL chainsaw engines?
Andreas Stihl AG & Co. listen), German: [ʃtiːl]) is a German manufacturer of chainsaws and other handheld power equipment including trimmers and blowers. Their headquarters are in Waiblingen, Baden-Württemberg, near Stuttgart, Germany.
What is STIHL 2-mix engine?
The two-stroke engine with 2-MIX technology sets new standards. During scavenging a layer of air without any fuel is created between the burnt charge in the combustion chamber and the fresh charge in the crankcase.
Should you use premium gas in chainsaw?
To start, both Stihl and Husqvarna recommend the use of high octane unleaded gasoline. Both brands of pro saws are designed to burn fuel rated at 89 octane or higher. Most regular grade fuel has an octane rating of about 87.
Can I use 2 stroke oil for chainsaw?
Is 2 stroke oil the same as chainsaw oil? Yes, 2-stroke oil is the same as chainsaw oil. However, a chainsaw engine could also be designed for a 4-stroke oil.
What is special about 2 stroke oil?
A 2-stroke oil will lubricate the engine components by association with the fuel (either by mixing with it or by spraying during combustion), so this oil contains components that promote its combustion.