Identifying Your Engine Type: Comprehensive Guide to Distinguish Between 2t and 4t Engines

Question

Hello, I know that such a post has surely been somewhere, but I can't find it, and it is a much-needed information for me on how to check what engine we have. If someone could explain to me how to check it I would be very grateful.

Blicek · Answer

Is this some kind of joke? Head with valves 4T Head without valves 2T You do not need to be a specialist to distinguish by the gang of the engine work....

catryk · Answer

Of course ze need not, but I did not see so I decided to go to the forum and ask, because I think that's what this forum was created for. Thanks a lot for your help.

Rowik · Answer

in 2t engines you pour oil into the fuel, in 4t-oil directly into the engine ( I don't mean the cylinder ) in a different way also looks ,,top,,it's probably the easiest to recognize ( leaving aside the work, sound and visual construction )

Anonymous · Answer

And smoke when the two-stroke engine is cold.

catryk · Answer

then since I have an oil fill hole in the engine, and if I pour pure 98 gasoline at the station it means it's a 4 stroke? And as for the smoke that flies when the engine is cold, I also have it, but isn't it some kind of defect?

budiet · Answer

Every engine smokes, especially when it's cold Maybe you have a lower-valve engine like in older mowers;)

Anonymous · Answer

Why so much writing, it was enough to give a photo or give the model of the engine and everything would be clear.

Anonymous · Answer

A two-stroke engine has a specific piston with windows. When you remove the exhaust pipe from the cylinder or cylinders, you will see the piston(s) and these windows. In a four-stroke, you won't even see the piston, because that piston is behind the exhaust valve.
If you can't identify by the head, check like this.

Inkwizycja · Answer

Rowik in new scooters with 2T engines separately pour and fuel and oil (dispenser) so this is not an indicator of engine type.

budiet · Answer

The best way to do this is to unscrew the plug, plug the hole with your finger and rotate the engine shaft.
If compression occurs every other stroke (that is, every one revolution of the shaft) then you have 2 strokes.
If compression is every 4 strokes (that is, every 2 revolutions of the shaft) then you have 4 strokes.

Rowik · Answer

I know that in new scooters you pour separately, but you do not pour this oil directly into the engine to lubricate the crankshaft and everything else, but into another separate reservoir, from which, with the help of an oil pump, the engine dispenses fuel-oil ratio by itself....
If you pour normal oil into the engine - such as motul 10w40, and at the station you pour pure gasoline, then you have a 4 stroke.
If you pour oil such as motul 2t into a tank somewhere next to the fuel tank (if it is, for example, a scooter, or other wonder), then you have 2T.... there is no need to pursue this topic further

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kwok · Answer

I was repairing a petrol cutter (replacing the crankcase) and what was my surprise that the 4-stroke was running on mixture. I think it was a Husqwarna.

kryststgpom · Answer

Stihl has a 4-mix that also runs on a mixture. Link .

Identifying Your Engine Type: Comprehensive Guide to Distinguish Between 2t and 4t Engines

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