27cc 2-Cycle Straight-Shaft Gas String Trimmer TB80 EC

When pulling cord to start, makes a clicking sound and won't start

How to Identify and Fix Common Gardening Problems ?

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If your trimmer engine idles, but stalls on throttle, check the following parts: the gasket, primer bulb, fuel filter, air filter, fuel vent, fuel line, and carburetor. The repair and symptom guide will help you better identify the part needed to be replaced and how.
When your trimmer starts and runs on choke, it could be because the check valve in the gas cap is clogged. Start the trimmer and gently unscrew the gas cap halfway off. Turn the choke off and assess. If the engine is still running, that means the gas cap may be the culprit.
If the engine is running fast (revving high):

Make sure that the choke is disengaged and the throttle hold has been reset by pressing the trigger. You can check the throttle cable to make sure there are no kinks found in it – however this requires a mechanical proficiency to strip down the machine uncovering the cable.

If the carburetor is new or has been rebuilt, you should set it to “factory” adjustment. You can do so by adjusting the idle mixture screws to 1.5-2 turns out, and the idle speed screw to 1-1.5 turns in. Warm the Engine Up. The engine`s running temperature directly correlates with proper air and fuel mixtures.
Why would the engine only run while the choke is on or with repeated manual priming? An engine that requires the choking (partial or full) after initial engine warm up is an indication that the engine fuel air mixture system is out of adjustment.
A choke valve/cable is designed to restrict the flow of air in the carburettor of an engine. This helps enrich the fuel-air mixture, improving the ability to start an engine in low temperature conditions.
A weedeater can spin around 12,000 rpm. So, assuming an 8″ weed eater string.
With repeated use over time coarse hair can cause blade tips to become very sharp and pointy. Skip tooth blades are very prone to being “sharpened” by coarse hair. Careful! They can literally make slices in the animals skin if they are sharp enough.
If the engine is not revving up and cuts out before you reach higher revs then you need to do the following checks: Fuel: Make sure it is fresh and correctly mixed (see `Starting Issues`). Air filter: Make sure it is clean and unclogged. Fuel cap: Make sure it`s hand-tight.
If the engine will idle but dies at full throttle the main jet in the carburetor may be plugged. You can repair a plugged main jet by cleaning it, replacing the jet, or replacing the carburetor. If you choose to clean or replace the main jet, you will also want to clean the rest of the carburetor.
Run it at full throttle

A: Absolutely–and in fact, you should! You are correct in observing that your cut quality is better when your mower operates at full throttle. Lawn equipment (including lawn mowers, lawn tractors, and even trimmers and blowers) is designed to run at full throttle to give the best performance.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

It starts and runs for a bit but as soon as it hits thicker grass it dies
ANSWER : Joe Hi there. Sadly your trimmer will struggle on thick grass as it’s not made for it. You could try moving the trimmer like a scythe. This will aid it as your cutting bit by bit.

Toro 149cc Lawn Mower Won't Start – Toro Lawn Mower With Toro Power Tools
ANSWER : Bad carburetor your old fuel jammed up the jet so it won’t get fuel and if it does it will start and shut off So replace the carb or try to clean the jet and run non oxy fuel only

Toro clear won't start – Toro Power Clear 621 R
ANSWER : Bad gas , plug ,air filter , no spark ck all need all 3 to start

Mower won’t start
ANSWER : This may sound stupid but don’t mean it to…
Have you tried with the choke all the way open? Do you have an automatic cruise? Is the right (correct) pedal being pushed in? These will affect if it starts or not. Also if your drive belt or one of the other belts not being tight enough will affect if it starts or just turns over. Not too many things can stope it from starting with new/good battery AND if its getting gas. Try cleaning your gas line and obviously making sure there is no obstruction around or near your blade, if it does start with blade engaged that is :))
If it doesn’t start with blade engaged, well make sure it’s in neutral. Mine won’t start in reverse but will in forward or neutral.

Hope it helps.


Why does the echo start but die when i move from cold start to run?
ANSWER : Fuel issue, carb adjustment, fuel lines, carb rebuild.

Do you know what the proper Champion part number is for a Toro 51972 weed trimmer is? This was purchased used and it had a RCJ4 Champion plug in it and I just need to verify that this is the correct plug. The trimmer won’t start and I want to start there with trying to solve the problem.
ANSWER : That is the correct spark plug for the unit. i work at a power equipment store where we work on homelites. 90% of the time it wont start or run right is usually carb issues . need to get it rebuild or replaced

My trimmer starts but after warming up stops and wont start again
ANSWER : After it stalls take the fuel cap off and put it back on and see if it starts,maybe the cap is bad or clogged and not letting air in to equalize the pressure of the fuel being used

My petrol weedeater/trimmer wont start – Ryobi Three Trimmer Combo
ANSWER : A few easy steps does it spark if not change the plug
if it doesnt spark now it could be a split in the HT lead so change that
Make sure u have clean petrol/oil mix
If still no luck check the on/off switch for rust or water
if damaged clean