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Re: Homelite trimmer Carburettor
Try cleaning out the cab, with a wire from a loaf of bread stip paper from wire and probe all holes for any debris that could possibly cloging a hole. If that don't work then try a rebuild kit still dont work then you might need to bring it to a repair shop to see if you need a new carb.
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1.You have to remove the air filter *** cover.
2.Remove air filter.
3.Remove 2 screws, to remove the rest of air filter ***.
4.Remove the 2 fuel lines with a long nose plier.(Take a photo of
the position of fuel lines or mark fuel lines for reassembly)
5.Unhook the throttle cable. Now to fix the Carburettor
1.Remove the 4 screws on primer bulp side of the carburettor.
2.Open the carburettor and clean with paint brush and clean fuel.
3.Replace diaframe kit(available from your nearest dealer) and reassemble the trimmer.
Check you have a spark, connect a spare plug and hold it to an earth, crank the engine and watch for a spark. If not check your ignition circuit. If a good strong spark proceed: Check fuel supply to carburettor - make sure there are no transit plugs that have not been removed. Easiest way is to disconnect the supply hose - no naked lights!!!! If that\'s OK remove the carburettor float chamber and check that fuel is reaching the carburettor. If the float chamber is dry, check the float valve assembly. There\'s not usually much to small engine carburettors so if the fuels getting to the carb it may be a blocked jet or just very badly adjusted. There is also the possibility that the carb is faulty (yes I know it\'s new but ...!). If fuel and spark is OK then it could be the spark timing - it should be OK unless you\'ve stripped the engine. On some engine\'s it is possible to set the spark 180 degrees out so that it sparks on the exhaust stroke - just to confuse things some engines spark on both exhaust & compression. Good Luck!
Check that the cable which connects the throttle to the carburettor is actuating the throttle butterfly valve in the carburettor. You should be able to see the valve moving if you remove the air filter.
Check that the carburettor and fuel lines are clean. If the unit has not been used for a while the gas (petrol) will evaporate leaving the oil behind to choke up the fuel system. Dirty fuel will do the same. When adding fuel use a funnel with gauze filter in it and always empty the fuel tank and then run the motor until it dies when you've finished work.
It maybe sounds like you need to replace the fuel lines with some of the new "Tygon" lines which are more ethanol resistant. Check in the fuel tank for the condition of the fuel filter and fuel line that hook onto itl
Cracked and/or old deterioted fuel lines will leak air, causing loss of prime. Sometimes as they deteriorate, remnants of them end up in the fine mesh fuel strainer screen on the fuel pump side of the carb, restricting fuel flow inside the carb and causing your problem. Take off the cover to the carb that doesn't have the vent-hole in it's top. That is the fuel pump side...look at the carb body under the fuel pump diaghram and you will see the round fine-mesh fuel strainer; It is press into place in the carb body but can be removed with a fine, sharp object. Check there and maybe go to the small engine parts shop and ask for about a foot of each of the 2 diameter fuel lines you will be replacing.
A carburetor diaghram kit or rebuild kit may be needed also and there are many for sale on Ebay....you need to know your carb model though.
Sometimes even if the diaphram and gaskets look ok they may not be. If the diaphram is stretched or distorted even a little they wont work properly,same for gaskets and other parts of the carb. sometimes the littlest things can make a big difference. I would try a complete rebuild kit and while everything is out of the carb. spray the carb real good and then lite-ly blow out the carb. with an air hose also if you take a twist tie from bread and take off half of the paper from the wire and carefully probe all holes in carb. that might do the trick for ya. After you put the high and low adjustment needles back in (if your zamacarb. is set up with them) you'll want to set the low needle (after turning all the way in till it just bottoms) at 1 and 1/4 turns out and the high at just about 1and 1/2 turns out, then while running make final adjustments.
A number of possibilities: 1. Air filter needs cleaning. Remove two screws at the side of the filter housing (has the choke control through it) and remove filter from inside. Clean in water with detergent. Allow to dry before saturating with 30SAE oil - squeeze to evenly distribute. Then replace. 2. Fuel tank is insufficiently full allowing air to get in when machine is rotated awkwardly. 3. Fuel line or carburettor jet blockage. Try a little compressedair down the line.