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The standard, simple type of two-stroke gasoline engine does not have valves in the sense that a four-stroke engine has them. The two-stroke principle remains the same but they may be achieved by various mechanical means. A main problem with simple two-stroke engines is that they are not very effective in getting rid of the burnt exhaust gases. The difference between models is in how the combustible gas is introduced and also on scavenging or exchanging the exhaust gas for a fresh blend of gasoline and air, finally there are different exhaust methods. The piston-port method is the simplest in small engines, but there are other designs such as the reed and inlet rotary valve, the stepped piston engine, the power valve system and direct injection.
What else can I help you with?
Is 1997 90HP mercury outboard engine a 2 cycle or 4 stroke?
generally speaking if it has valves its a 4 stroke 4 cycle engine......if it doesnt have valves then it is a two stroke 2 cycle...................
How do you adjust valves on a 2004 polaris sportsman 400?
There is no valves as it is a 2-stroke engine .
Why deflected shape of piston in 2-stroke engine?
In a 2 stroke engine the piston itself is the intake/exhaust valve, instead of having separate valves as in the 4 stroke. The odd shape of the piston is the location of these valves.
Can side cam engine be installed in 4 stroke or 2 stroke engine?
sidecam engine cannot be installed in 2 stroke engine because in 2 stroke engine we have inlet & exhaust ports not valves... so when piston moves up and down it automatically opens the inlet and exhaust ports so it does not require any camshaft for opening of valves as it is required in 4 stroke engine
How many valves does a 2 stroke engine have?
3 to 4
What are the names of the strokes on a 2 stroke engine?
all strokes are the same intake, compression, power, exhaust but it all happens in 2 revolutions of the crank instead of four revolutions like 4 stroke. Also 2 stroke has no valves and four stroke has intake and exhaust valves. hope this helps
How can you tell the difference between a 2 stroke and a 4 stroke motorcycle engine by looking at it?
a four stroke has a timing chain and a cam and a two stroke doesnt a two stroke has reed valves
How do you tell if a 49cc engines is a 2 stroke or a 4 stroke for a pocket rocket?
It should be a 2 stroke .Ans. 2A 2 stroke engine has a transfer port from the bottom of the cylinder to about half-way up it; it has no valves.A 4 stroke engine has no transfer port, but has inlet and exhaust valves, with their associated valve gear.
How many valves does a 2stroke engine have?
As any 4 stroke engines, it depends on the amount of cylinders it has although it is commonly said that "2 stroke engines do not have valves", this saying mainly applies to out boards, weed eaters and these types of engine, but some GM engines such as the 671s and some others do carry valves.
How can you say that it is 2 stroke engine or 4 stroke engine?
There are plenty of pointers, but quite a few exceptions as well: - 4-stroke engines will have a camshaft, a 2-stroke can do without - a 4-stroke will have an oil sump, and a separate pressurised oil lubrication system. A 2-stroke can get by on oil mixed in with the fuel - 4 stroke will generally rev lower than a 2-stroke - a 4-stroke will generally have intake and exhaust valves in the cylinder head, while a 2-stroke may get away by using ports in the crank case.
How many valves per cylinder in a four stroke engine?
Four stroke engines must have at least 2 valves: one exhaust and one intake. Most modern engines are going to 4 valves per cylinder to allow the intake and exhaust strokes to be more efficient.
Why fuel consumption is less in 4 stroke engine then in 2 stroke engine?
Why the fuel consumption is less in 4 stroke engine as compared to 2 stroke engine
