If your chainsaw is over-revving, it indicates a lean air-fuel mixture is supplied to the engine. Loosen the screw until the chain stops revving without the trigger pressed with the engine on. If you ask an expert, the number one factor behind the chainsaw surge is the engine running lean.
Take the exhaust off and have a look at the piston and cylinder through the exhaust port and report back, pics always help. The 380 has a non metallic cylinder gasket and M5X18 cylinder screws that tend to come loose. The reluctance to turn off- I have a husky 357xp, and it did the same no-shut off thing.
SOLVED: Chainsaw starts then revs high and then cuts – Fixya. Loading…. Oops :Please try again.
Im not sure if this helps but I know my Husky has a fast idle setting and revs high untill I give it throttle,, once you pull the choke out the fast idle is On even if you push the choke in, it stays on untill you squesse the trigger,, try it with the saw off, pull the choke then push it back in then squesse the trigger, you can hear it click when the fast idle shuts off. Not sure if thats your problem but maybe it will help.
why is my chainsaw over revving Related Question:
How do I get my chainsaw to idle?
1 – When the saw is warm and not running, turn the adjusting screw in (clockwise) a half turn, start the saw, repeat this process until the saw idles. 2 – The saw now idles, great! But it should idle without the chain moving.
Why is my chainsaw surging?
From my experience, surging is due to either lack of fuel, or lack of air. Make sure that the fuel isn’t air locked, or the filter plugged. Also, a dirty air filter is good to check, if you haven’t already.
Should you let chainsaw idle?
The idle speed should be lowered until the clutch is totally disengaged. Personally I don’t like to leave a saw on the ground running as it just sucks up dirt and soots up the exhaust. Once warm your saw should start with just a little tug and if it doesn’t maybe some tweaking is in order.
How many rpm does a chainsaw turn?
Pull the throttle trigger, run the chain saw at full speed and note the tachometer reading. Depending on your saw, the reading should be between 10,000 and 14,000 rpm.
Why does my chainsaw only runs on choke?
When your chainsaw only runs if the choke is on the problem, in most cases, is a result of fuel supply problems or a faulty carburetor. To fix the problem you should check and clean the fuel system and carburator.
Why is my chainsaw idling so high?
The most probable – and easiest to fix – cause of chain rotation while the chainsaw engine idles is a poorly adjusted idle setting on the carburetor. The result is that too much fuel is delivered to the combustion chamber when the throttle is released, and the engine doesn’t really slow.
What causes a chainsaw to not stay running?
There are many factors that can stop your chainsaw from running, including a bad spark plug or dirty air filter. There are simple problems: a broken fuel line, bad fuel, wrongly calibrated high-low adjustment screw. Also, more complex issues like a damaged carburettor or an engine compression problem.
Why does my chainsaw start but wont stay running?
The most common problems why a chainsaw does not stay running are: Spark Switch/Plugs. Bad Fuel. Blocked Carburetor.
How long should you warm up a chainsaw?
Chainsaw warm-up is briefly starting the machine and letting the engine/motor run for a few seconds. Whether you have one from Husqvarna, STIHL, Craftsman, or Echo, every woodworker would want to have a great sawing day with their tool.
Why does my chainsaw bog down when I give it gas?
If your chainsaw is bogging down when you give it throttle, this is often a sign of improper gas-to-oil ratio. If there is too much gasoline in relation to the amount of oil used, this is known as a “rich mixture” and can cause the chainsaw to run poorly.
Why does my chainsaw dies when I let off the gas?
After the throttle is let go, the vent closes and a small amount of fuel is still let into the carburetor keep the engine idling. If the Stihl chainsaw stalls after cutting, it is likely from problems in the carburetor, which will require an adjustment.
How do you start a stubborn chainsaw?
Try to start the chainsaw after priming the carburetor. 5. Activate the choke by moving the lever to the full choke position and pull the starter rope 3 or 4 times to start the engine. If that doesn’t work, move the choke lever to half choke and pull the starter rope, 6 times maximum, to start the engine.