Yes, most chainsaws do have two stroke/cycle engines. However, people have made them with four stroke/cycle engines such as the V-8 chainsaw seen here: http://www.YouTube.com/watch?v=60Tamp2fHhg
It depends, a chainsaw or weed wacker can be run upside down because the two cycle oil mixed in the gas is what lubes the engine. A Detroit Diesel two stroke engine can not.
Explain the advantages of four-stroke engine over two-stroke engine
in my opinion a two stroke engine is a better quality engine as compared to a four stroke engine!
Detroit diesel engine is an example of two stroke engine
two stroke
You freeze up the engine
A two stroke engine has half the strokes of an otto (or four stroke) engine, therefore it takes two crankshaft roatations to complete a cycle on a four stroke engine and only one revolution in a two stroke engine. There are several types of two stroke engines, the different types have to do with how the receive the air/fuel mixture, also you have two stroke diesel engines.
suction stroke and exhaust strokes are the two strokes involved in 2 stroke engine....
Yes, a Vélosolex has a two-stroke engine.
You can use four stroke oil for a (very) limited period in a two stroke engine in an emergency. However it is not formulated for two stroke engines and is not recommended.
No it isn't fatal, but it would smoke quite a bit, because a two stroke engine needs two stroke oil mixed in the petrol, and a four stroke just needs petrol.
Four stroke engines are quieter than two strokes, but have less power.