Quick Answer: Why Does My Chainsaw Only Runs On Choke?

Is it bad to run an engine with the choke on?

Leaving the choke on while operating will result in excessive fuel consumption, irregular engine power performance and eventually may even damage the engine.

Some engines utilize a manual fuel primer bulb to enrich the ratio of fuel in the fuel air mixture for initial engine starting..

How long should I leave the choke on?

30 secondsThe choke usually “chokes” the air supply into the engine so it gets more petrol than usual. Hence it’s name. You should start the bike from cold with half or full choke depending on how cold it is. After 30 seconds is usually enough for most bikes.

Why does my 2 cycle engine stall when I give it gas?

Air Filter When the fuel has passed through the fuel filter, it enters the carburetor where it’s mixed with air. If your air filter is clogged, it will literally suffocate the engine when you rev the throttle.

Why does my engine only run with the choke on?

An engine that will fire and run with the choke closed but dies when the choke is opened likely has debris at least partially blocking the fuel passages in the carburetor. In this condition the closed choke provides enough extra fuel to enter the engine to overcome the lack of fuel flowing through the other passages.

Why won’t my bike run with choke off?

A choke is active when it is closed;that is, it is on when it is closed. Normally you would keep it on (closed) until the engine warms up and then turn it off (open). If it really won’t run without the choke being closed/on then it’s not getting enough fuel and the carbs probably need cleaning.

Why does my engine die when I give it gas?

A dirty carburetor or something is restricting fuel flow. When you hit the gas pedal, the throttle plate opens, allowing a lot of air in, the engine vacuum plunges, and without an increase in the amount of fuel, the fuel-air mixture is simply too lean for the engine to continue running.

How do you fix a chainsaw that won’t stay running?

Vent in the Fuel Cap is plugged – If the vents in the fuel caps are clogged the fuel becomes vacuum locked. Check the cap and clean it or replace. High-Low adjustments screws may need calibrating – If you have these screws in your chainsaw, adjust them by turning both screws clockwise until you reach the end – gently.

What happens if you leave the choke on too long?

Leaving the choke on for too long will cause unnecessary engine wear and waste fuel. … The engine needs its fuel to be vaporised in order to burn it. This is done by the carburettor where the fuel is mixed with clean air coming from the air filter, and sent into the pistons to be ignited.

How do you fix a rich running dirt bike?

The 6 main ways to fix a motorcycle running rich are to:Adjust the air to fuel ratio.Check if the needle is sticking in the carburetor.Check for stuck open floats.Clean your air filter.Check for stuck open butterfly valves.Change your O2 sensors if your motorcycle has them.

Why does my chainsaw run then stop?

A clogged carburetor is often caused by leaving fuel in the chainsaw for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the chainsaw engine to stall.

How do you adjust the high and low on a chainsaw?

Carburetor Adjustment ProcedureBefore you start the saw, locate a small flat-bladed screwdriver. … Begin by checking the saw’s air filter. … Check the fuel level. … Start the engine and warm it up. … Begin by setting the idle speed. … Set the low speed fuel adjustment. … Go back to step (4) and reset the idle speed.More items…

What Chainsaw do professional loggers use?

Choosing Between Stihl and Husqvarna Stihl fans say that they like their chainsaw because it offers low-end torque necessary for powering through the toughest woods without a struggle. The fact remains- both brands design great loggers’ chainsaws.

Why does my chainsaw dies when I give it gas?

An engine stalls when it’s getting too much or not enough fuel from the carburetor. Stihl chainsaw carburetors usually have three adjustment screws: one each for idle, low speed and high speed. … If the saw is stalling when you pull the throttle trigger or it doesn’t reach its full power, adjust the high-speed (H) screw.

Why does my motorcycle run better with the choke on?

As far as your bike running better with the Choke ON, that is a clear indication that your engine is being fed a lean mixture. Most carburetors have a choke that operates by either adding more fuel or by restricting incoming air. Both methods produce the same effective enriching of the mixture.