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Pull cord stuck
No matter how hard you pull starter cord won't budge or barely moves.
Bad starter recoil
Starter recoil is just jammed or actually broken. Remove and check for problems. Replace if necessary
Engine is seized
With the starter recoil removed. Remove spark plug and try to move engine manually. If it doesn't move engine is seized. It might be able to be freed with 2 stroke oil in the cylinder. If not it will have to be rebuilt or scrapped altogether.
Engine runs poorly, will not start or stops after a few seconds
Equipment not performing as it should.
No fuel or fuel that has gone bad
Before getting to excited make sure there is fuel with the proper oil and gas mixture. If it has been sitting for a long time the fuel can go bad and needs to be replaced.
Bad fuel lines
Check fuel lines for cracks and leakage. Replace if damage is found.
Dirty or clogged air filter
Engine may not be getting enough air. Remove air filter and clean with warm soapy water and let dry or replace with a new air filter.
Dirty or clogged fuel filter
Engine may not be getting enough fuel. Remove and replace fuel filter.
Bad spark plug
Engine may not be getting enough spark. Remove spark plug to check for damage and heavy carbon build up at the electrode. Replace if any of these conditions exist.
Clogged spark arrester
The spark arrester is located in the muffler and if it becomes clogged it can cause poor performance. Remove and clean with wire brush or replace it with a new spark arrester.
Bad on-off switch
On-off switch may be faulty causing the engine not to start. It can be tested with a multimeter or disconnect one of the wires from the switch. If the engine starts when it is disconnected the switch is bad and needs to be replaced.
Bad carburetor
The carburetor may not be functioning properly causing poor performance or failure to start. Jets and ports can become clogged over time. You can first try to clean the carburetor with a carburetor cleaner. If that doesn't prove effective, rebuilding or replacing the entire carburetor will be necessary
Team
USF Tampa, Team 1-20, Donnelly Fall 2014 Member of USF Tampa, Team 1-20, Donnelly Fall 2014
USFT-DONNELLY-F14S1G20
1 Member
12 Guides authored
49 Comments
will too much oil cause your machine to bog?I take it empty gas, change spark plug? put proper gas in .the gas I put in was at the very bottom of the can and it's to cycle
Eddie Cunningham lll - Reply Share
I cannot get the head off to see if there's string left in there and if it jammed. It is an auto feeder. HELP!
Pat - Reply Share
if you look at the side of the top cover of the trimmer head, you will see a small cutout. rotate that around until you line it up with a hole on the inside. Fit a screwdriver (Or anything metal that fits) through the cover and the hole inside to keep it from rotating,.
jarret capozzi - Reply Share
How to test ignition coil to see if there is spark
willie moreno - Reply Share
I use a cheap feeler gauge.
jarret capozzi - Reply Share