When the sawyer depresses the gas pedal gun trigger , a humble cable opens up a vent on the carburettor , allowing more fuel into the chain saw ’s carburetor . After the accelerator is let go , the vent close and a modest amount of fuel is still let into the carburetor keep the engine idling . If the Stihl chainsaw stalls after slue , it is likely from problems in the carburettor , which will command an adjustment .
Before Adjusting Carburetor
Before adjusting the carburetor , you demand to clean the fuel and air system . If you adjust the carburetor ith these system dirty , when they in conclusion get clean , the adaptation will be off , which can demolish the Stihl engine . Remove the strain filter pad and shake off all the dust with your palm . Replace the air filter if it ca n’t be make clean . debilitate any gas older than three days from the fuel tank and dispose of it according to local environmental regulations . shuffle a brisk supply of Stihl chainsaw fuel and fill up the storage tank .
Adjusting the Idle Screw
Start the Stihl chainsaw and allow it to run for about 10 minute of arc to warm up . Do n’t conform a carburetor on a cold engine , as the adjustment will be wrong . set the chain saw legal community so the mountain range wo n’t hit anything during adjustment . The three carburetor adjusting nooky are located on the clutch side of all Stihl chainsaws . The piece of tail mark " LA " manipulate the idle speed . Insert a pocket-sized screwdriver into this trap and adjust the idle screw clockwise and counterclockwise to obtain the highest rpm before the clutch engage and the chain of mountains starts spinning . Never use a chain saw if the mountain chain still spins while idling .
Adjusting the Low Screw
The screw marked with an " L " controls the scummy speed fuel mixture on the carburettor . Rotate this screw very lento clockwise and counterclockwise while noting the different noises from the locomotive . When the engine starts surging , back off the screw until it start bubbling .
The optimum low speed setting for your Stihl will be between the bubbling and surge . attempt to achieve an optimal Libra of quickening and power , but do n’t over - adjust the screw so the engine is surging , which can damage the engine . After finding the low speed setting , readjust the idle speeding . Leave all gamy - speed modification to a Stihl grease monkey .
Carburetor Problems
A cleaned fuel and air system , compound with a properly adjusted carburettor will solve most minor engine and carburettor problem . However , if the Stihl is contract old , over seven years , you may demand to absent the carburetor , take apart it and clean it .
houseclean the carburettor parts in a bathroom of unmingled fuel and brush off any hardened textile cautiously , so as not to damage the gaskets and diaphragms . audit the inlet control lever and needle arm , as they are likely not seating properly and make the locomotive engine to stall out after the jets shut . Leave carburetor repairs to a car-mechanic if you ’re not qualified .
