I always have trouble starting my 2-cycle gas trimmer. I follow the directions and get it to start on Full Choke then move to Half Choke and try starting again. It almost always will start and run at very high RPMs and quickly die. I have never been able to turn the Choke to Run and have it operate normally. The only solution I have found is to run the trimmer somewhere between Full and Half Choke but even then it seems to run too fast and if I let off of the trigger it will die quickly. Is it just defective? I don't know much about fixing motors so I don't know what to look for. Any ideas welcome.
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Re: Trouble starting gas trimmer
Yes. It sounds like you need to clean the carburetor. Take the carb. off, disassemble and spray with carb. cleaner. Make sure to clean the small screen in carb. Clean the small portals with a Den Tek Brush, (used for cleaning between teeth). They work great for this job. Reassemble carb. and try starting. If this doesn't cure the problem then you will need to buy a new carb. kit and replace the needle valve, gasket(s), diaphragm, & small screen.
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John - Husqvarna makes really good power equipment that seldom offers trouble. The unit you are talking about is a 2 cycle system, meaning you mix oil and gas together in lieu of having an oil sump at the bottom of the engine like 4 cycle motors have. First question, did you mix a bottle of One Mix 2 cycle oil to a gallon of regular gas to start off using your machine? If you did, then I would think your unit is badly flooded, which happens a lot with 2 cycle equipment. Try taking out the spark plug and see if the spark plug looks wet from too much fuel. If it is, leave the spark plug out for a day or so to allow the cylinder head to vent the gas fumes. Replace the wet spark plug with a new one and try to start the unit again. Here's a tip: If you do flood a 2 cycle piece of equipment (trimmer, chainsaw, blower, etc.) again, make sure the choke is off and hold the throttle trigger wide open. Pull the started cord several times until the unit starts to run. Keep holding the throttle wide open until it clears itself out. Remember, you run the equipment, it does not run you :-)
Those direction are not accurate all the time, I usually prime mine 4-6 times. put mine on full choke with the trigger pressed and pull 1 time any more will usually flood it, If you have the choke that kicks off after you press the trigger, put the choke back on to half and pull the cord pressing the trigger, Then pull the cord until it starts without pressing the trigger. As before if you press and hold the trigger during the start it will flood these trimmers..This should start the trimmer. You may have to let the trimmer set for about 15 min if it was flooded.
I hope you have fresh gas and 2-cycle oil mixed up! They always seem to start strong and explosively cut on good, fresh fuel. :D
2:Push the primer bulb (rubber ball by the side of the air filter) 3 times.
3:Place trimmer on ground. Grasp the handle, squeezing the throttle fully in left hand. Kneel and give that starter a crisp, sharp tug with your right hand. If the engine "hits", then push in the choke until off. Goto step 4.
If it does not give a hint of life, repeat the tug on the line 2 more times. If it STILL does not start, check for a distinct odor of gasoline. Likely, at this point, it is flooded, proceed to step 5.
4: With choke now off, continue to depress the throttle fully and give it another sharp pull on the starter. If it starts and revs? Let it idle for a minute to warm up, then go to work!
5:With choke OFF, press and hold throttle at full. It may take several pulls on the starter rope to see any life. If after 10 pulls and there is still no life, and still smells of gasoline - time to see the Ex about getting the trimmer looked after for some TLC. :D
These 4 cycle trimmers need to be primed 10x before a cold start. The bulb will feel *firmer* on the last two or three depressions and you'll know that the carb is primed.
Full choke and and full throttle on first tug should see it hit once with a puff of smoke. Second start attempt should be in choke position two (half choke) and with full pressure on the throttle. Should rev to life on start attempt. Let the engine IDLE for 30 seconds, moving the choke to off at the end of the waiting period. Let engine idle to warm another full minute with no choke, then set to work!
The gas is going into the the crankcase. When the piston goes down it opens the ports and allows the gas to go down untill it could fill the crankcase. Start by blowing compressed air into the spark plug hole and allowing the piston to go to it's lowest position. This will usually remove any liquid gas from the crankcase. Next get yourself a small spray bottle and fill it with the same gas mixture your trimmer uses. Now you can spray a small amount into the spark plug port, replace the spark plug, full choke and pull till it pops. set to half choke and pull. I have also sprayed into the carb but you must open the throttle to allow the gas to enter the combustion chamber. Spray,close throttle,pull choke and pull. You may need to do this a few times for it to start. After it starts let it run at half choke for awhile until it warms a bit then open choke and go to full throttle. If this dosen't work it's possible to have other problems.