Question about Garden
Chainsaw troubleshooting .....mine runs with choke on but speeds up and cuts off when i take choke off......
If your saw runs with choke on or half on but won't run with your choke off there are a few things you can do to see if they work. Check the air cleaner, clean it with soap and water and allow it to be completely dry before installing it on the saw. 2nd check the spark plug for fouling, take it out after the saw has stalled, if it is wet, it is getting fuel, if it is dry it might not be getting enough fuel. 3rd In the gas tank take a pair of needle nose pliers and carefully pull the gas line out, you need to move it around inside the tank until you can get ahold of the end of the gas line that will have a small barrel shaped fuel filter on it. Take a close look at the small filter and make sure it will the gas flow through it. you can give it a shot of compressed air to clean it or replace it if it is plugged. While you are at it check the small fuel lines, they are a clear gas line and can become very soft and fall a part or very brittle and break, if either of those issues are present replace the fuel lines with new line, very inexpensive but be sure to take a small piece with you to match it up. Also check the primer bulb if it has one for any leaks by depressing it and listening for air leaks. 4th, take your recoil pull start off and set it aside, you will have access to the flywheel. it will have magnetic pickups on it, turn it by hand and when the magnetic part of the flywheel is exposed clean it off with some brake cleaner or carb cleaner.Be sure there are no metal filings or dirt, grime oil on the magnetic pickup and reassemble by installing the recoil pull cord housing..
When you have the spark plug out, rest it in the hole and pull the strat cord, while you pull on the cord be sure to look at the end of the spark plug, you should see a blue white or blue yellow spark, if you do not get someone to help and hold the spark plug wire with well insulated pliers, holding the end of the spark plug against metal on the cylinder, you should see spark when you helper pulls the cord. Be sure the on off switch is in the on position when checking for spark. 5th The muffler will have a spark arrestor in it, they can plug with emissions from the exhaust and it will need to be cleaned and free of any build up. Last I would suggest checking the small screws that holds the carburetor together, be sure they are snug and no play..The only other things it might be is it has a torn diaphragm in the carb and will need a carb kit, or you have damage to you piston and cylinder causing a loss of compression.. Good luck, and be careful.
Posted on Jan 29, 2015
There may be a number of errors in the saw, or one of several.
If you have lots of used chainsaw or chainsaw has stood for a long time. Then the problem can be broken crankshaft seal.
Another possible problem is - improperly installed or defective carburetor gasket.
Posted on Apr 03, 2014
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Posted on Jan 02, 2017
That is where I would go. Maybe carb clean or kit if it is a sudden change.
Carburetor Adjustment by Madsens.com
CW is leaner; to lean will destroy the saw. If over tightened closed (CW) the adjustment screw faces are easily marred; marred adjustments are difficult to impossible to set properly.
Clean the air filter; adjusting with a dirty filter can cause a run lean condition once cleaned and the saw run.
There are 2 wav (sound - idle & full – may not be highlighted) files that I find most helpful, I think you will too.
If you have more questions or need additional help please reply below and I will get back to you. Thank you for using FixYa and Good Luck. HTH
Posted on Mar 01, 2010
The best thing you can do to these engines it take them completely apart - take piston out and everything. Believe it or not, my 12-year-old son was able to do it - very few parts in these little 2-stroke engines. He polished the carbon off of the piston with a drummel tool and cleaned everything with carb-cleaner. Put it back together and it ran like a champ. Still does. It was a great learning experience for him too. The worst that can happen is you have a bunch of parts that you will throw away.
Posted on Mar 19, 2010
Check the fuel filter and muffler for plugging. Check the fuel lines for condition. Check the carburetor fasteners for tightness. If the saw has a lot of hours, remove the lower section of the carburetor and check the condition of the diaphragm--it should not be hard/cracked. If everything seems to check out ok, Turn both jet screws CW to stops (lightly), then CCW each 1-1/2 turns. The engine should start and run--allow the engine to warm up. Pull the throttle full on and adjust H needle CW til the engine speeds up, but still 4-strokes. Proper adjustment is when the engine 4-strokes, but immediately 2-strokes when cutting. Let idle and adjust L CW so that the engine runs fairly well, but allows the engine to 'follow the throttle'. Adjust the idle speed screw so that the chain stops turning, but the engine continues to run. Hope this helps!
Posted on May 14, 2010
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