Okay on 2-stroke engines you are going to have 2 idle screws. (If you do turn screws, remember how much, so you can turn them back if you need to.)
Remove the plastic housing/cover of your chainsaw (if you cannot do this then you probably don't want to go any futher.)
Locate the Carburator, and there will be 2 tiny adjustment screws, you can tell it is an ajustment screw because it usually will have a spring on it to keep it from vibrating out.
One of these screws will have the letter "L" and one will have the letter "H"
which simply means "L"ow idle and "H"igh idle.
Crank the saw and without hitting the throttle (if it will stay running) adjust the "L" screw until desired idle is reached.
Now if you ever need to adjust the High end Idle you can just crank the saw and then with the throttle trigger on full throttle adjust the "H" screw to desired high end.
Note that your carburetor is clean though and good clean fuel is getting to it because a saw that has been stored or just not run in a while or some trash in the carburetor can give you nightmares when trying to adjust the settings and it still wont be running efficiently.
My rule of thumb is: If it has ran good in the past then it probably doesnt need adjusting now. Look for another reason such as Bad/dirty fuel Dirty/trash in the carburetor, fuel line/filter problems etc.
If the carb is dirty and you adjust it to run, then you are just choking it down so it will suck more fuel (because it wasnt getting enough fuel to run) having to compensate for poor air fuel ratio and then you are not getting enough air. The mixture has to be correct for the engine to run efficiently.
56.5cc, 3.0kw, 4.1hp, 13000 RPM.
The Stihl 034 chainsaw was produced from 1984 until 1996. This model was well-regarded for its durability and performance in professional and residential applications. It was eventually succeeded by newer models, but the 034 remains popular among vintage chainsaw enthusiasts.
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The engine displacement of a STIHL MS 034 chainsaw is 56.5 cc, which is equivalent to approximately 3.45 cubic inches.
The Stihl 034 chainsaw has a displacement of 49.3 cc. It is designed for professional use and is known for its power and reliability. This model is suitable for both cutting firewood and managing larger trees. Overall, it's a robust and efficient chainsaw popular among forestry professionals and enthusiasts.
The Stihl 034 chainsaw has a displacement of approximately 50.2 cc. This model is known for its durability and performance, making it suitable for a variety of cutting tasks. It features a powerful engine and is often used for both professional and residential logging and tree care.
The difference is in the motor size.The 034AV is 56.5cc (cubic centimeters) and the 034 Super is 61.5 cc (cubic centimeters). The 034 Super has a slightly larger motor, and therefore it presumably also has greater speed and power.
The equivalent new model of the Stihl 034 chainsaw is the Stihl MS 362. The MS 362 features updated technology, improved fuel efficiency, and reduced emissions while maintaining similar power and performance levels suitable for professional use. It is designed for both cutting firewood and working in forestry applications, making it a versatile choice for users familiar with the 034.
I have an 034AV Super and it came stock with a 20" bar. An 034 isn't quite as powerful (56.5cc vs 61.5cc), but a 20" bar should still work great on it.
The 034 takes either a .325" or 3/8" pitch chain. My guess would be 3/8 .050 go to chainsdirect on eBay chose the chain for youre bar size.
1990
To time a Stihl 034 chainsaw, first, remove the spark plug and ensure the engine is clean. Then, using a timing light, connect it to the spark plug wire and crank the engine. Adjust the ignition timing by turning the flywheel or adjusting the timing plate until the timing mark aligns with the specified setting, usually indicated in the service manual. Finally, reassemble any components, check the spark plug condition, and test the saw.