Question about Homelite Choke Lever 4 Blower W Zama C1u Carburetor

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Hard to start and won't idle or go into full throttle

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I would check the fuel lines and primer bulb for cracks or leaks. Possibly getting air in system.

Posted on Apr 28, 2010

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1 Answer

Sputters at full throttle and wont idle


Run pressure test on your fuel injectors. Fuel pump might not be suppling enough fuel line pressure.

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Idles at 1000 - 1200 rpms won't drop


high idle could be caused by air inlet duct collapsed loose or air filter element clogged,idle air control valve failed,idle air inlet passage or throttle bore is dirty full of deposit,mass air flow is dirty out of calibration,throttle plate throttle shaft or linkage is damaged or leaking.have vechicle code scan first before buying new parts.

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Won't run full throttle


try and clean the screen inside the muffler

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Yamaha outboard engine. Model f20leha manufactured 5-2011, has about 30 hours on it. Sinse new engine is hard to start, after finally getting engine started, hard to keep it running untill engine gets...


have you left the choke open ? this mixes more fuel to the engine upon starting but will stall it if left open too long . check your fuel filter too it may be full of debris.

May 02, 2012 | Yamaha Boating

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Whenever i put my blazer in gear it dies


I'm assuming it's the 2.8, I'm not sure when they started putting the 4.3 V6 in them.
Anyway, a few things come to mind when something won't idle.1. EGR valves. If they are open at idle, it won't idle. It's open at cruising speeds when the engine is warm, but not at idle or full throttle.
2. Idle air controller (IAC): This is a little electrical valve located on the side of the throttle body. It regulates the amount of air that the engine needs to idle at the correct speed. It makes up for stuff like cold temps, being in gear, or having the A/C on at idle. They also get full of junk and jam up, or simply fail electrically. Replacement is extremely simple.
3. Ignition timing. If the timing is late (********), engine vacuum is lowered and it struggles to idle, even without the load of a transmission in gear.
4. Vacuum leaks. Crunchy old vacuum hoses make everything worse.

Apr 07, 2012 | Chevrolet Blazer Cars & Trucks

1 Answer

Hard to start. once it starts will not idle, acts as if the throttle is pinned open and runs full bore. When running full throttle on its own the kill switch will not shut the saw off.


Remove the carburetor cover and observe the action of the carburetor throttle arm as you actuate the throttle. If the arm doesn't move, disassemble the throttle trigger assembly (making part placement notes as you do so) and clean out any accumulation of sawdust/dirt. Make sure the cable or rod which connects it to the throttle arm will move--there should be spring return of the throttle arm to idle position. If this fixes the throttle problem, but the kill switch still doesn't work, you may have to remove the left side case to access the ignition module and the kill switch wire which plugs into the end of the module. The switch itself may be full of sawdust as well preventing contact to engine ground. Hope this helps!

Jan 07, 2011 | Garden

1 Answer

Hard to start, and wont idle long.


Check the air cleaner and muffler for plugging first. Turn both jet needles CW to stops (lightly), then back out each CCW 1-1/2 turns. Turn the idle speed screw CW about 1/2 turn. This is a basic setting and the engine should start and run. Allow to warm up, then pull the throttle full on and adjust the H needle CW til the engine speeds up somewhat, but is still 4-stroking. Correct setting is when the engine 4-strokes, but immediately 2-strokes when cutting. Release the throttle and allow to idle. Turn the L needle CW until the engine runs fairly well, but still allows the engine to 'follow the throttle'. Adjust idle speed screw so that the chain stops moving, but still allows the engine to keep running. Hope this helps!

May 10, 2010 | Garden

1 Answer

Hard starting 4 cycle trimmer, 20 to 70 pulls


I got me one of these beasts and I can get her to fire for me in just 3 pulls.
(Oh yeah?! I can name that tune in just 2 notes!!)

Seriously....

Use that primer bulb. Use it with prejudice. Do NOT be afraid of it. What does this mean? Yes. Push it 10 times.

Choke full on.

Full throttle, choke fully on, give it a tug. You should see it hit and give a whitish puff of smoke.

Half choke - Position 2 - Full throttle, another tug. Should fire and rev with you still squeezing that throttle at full. Release throttle and LET IT IDLE at half choke for 30 seconds.

Move the choke completely off, continue to let trimmer idle for at least a minute to warm up the oil and block.

Git to whackin' that yard down. :D I just love my 575ES! (Polesaw attachment for the win)

May 07, 2010 | Troy Bilt Tb425cs 26cc 4 - Cycle Curved -...

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