If your chainsaw won’t start even after jerking it on, there’s probably an underlying technical problem that needs to be fixed so that the machine can run normally. There are various telltale signs that can show you where the problem lies so that proper measures can be taken. Some of them are as follows:
I. Flooded engine
Sometimes the engine may emit a foul smell when started which is a clear indication of flooding, in such conditions the exhaust might also accumulate some fuel due to insufficient combustion. Even tilting your saw in whichever direction will not make this engine oil to come out.
Start your check by removing the spark plug and looking out for accumulated moisture. If you notice too much fuel around the engine, drain it through the available spark plug hole then insert a new spark plug. Set master control pulley to minimum choke or full-open position, then pull your rope around 5-6 times to clear deposit fuel out of the ignition chamber. Leave the machine choke open and push starting cord severally, your chainsaw should pick up immediately.
II. Incorrect fuel mixture
All two-cycle engines such as those of gas powered saws require a mixture of oil and gasoline in order to function well. Moreover, each engine model is designed to operate using a specific gas-to-oil fuel ratio. For most models a 50:1 balance is recommended. Translating to 2.5 ounces of oil per each gallon of gas. To ensure that this mixture is correct, first drain all residual oil in your engine and apply it fresh again while taking constant measurements.
Remember to use only oil that has been labeled ‘Two-stroke’ or ‘Two-cycle’ and not any other random model, 2-cycle oil can be found in most major retail stores as well automotive supply shops. While synthetic fuel is perfectly okay to use, it must always be mixed in the correct ratio specified for your engine model. This is very important if your machine is to start smoothly without encountering any jerking problems. To mix your dual-cycle fuel, start by adding the correct quantity of oil inside the gas cylinder then slowly put in the correct portion of gasoline. In whatever you do, never mix the oil and gas directly into the gas tank together as this can cause technical problems. Similarly, avoid using fuel that’s over a month old for refilling as they may not be very effective after all. Also don’t add in more fuel than is necessary for a month’s job as this will only overburden the oil chamber, potentially causing leakages if the pressure becomes too much. This can happen with even the best professional chainsaws so don’t panic if this does happen.
As a safety measure, before performing any task on your gas chainsaw first detach the spark plug so that it doesn’t ignite accidentally. Likewise, do regular maintenance after every few days since the machine only works best when well taken care of. Most chainsaws nowadays come with an automatic stop feature to avoid injuries in case the machine accidentally falls off your hands, therefore ensure that the model you are getting has this particular feature before purchasing it.