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I need to know how to set carb to factory settings, already cleaned it. It runs but not right, hard to start

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Set flats at neutral to closed just below bowl height. Run mixture screw all way in by hand. Back out 2.5 rounds. Start and observe exhaust. Smells rich turn screw in 1/8 at a time

Posted on Jan 08, 2013

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Posted on Jan 02, 2017

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SOURCE: Carb settings.

The idle mixture screw is on the front and should be 1 1/2 turns out. The high speed adjustment on the side should initially be one turn out. Sounds like you have more of a problem than just carburetor adjustments. Are you sure the fuel pump is assembled correctly?

Posted on Jun 08, 2009

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I replaced gaskets and fuel lines now when i prime bulb gas runs out of carb,also need factory settings for H-L and throttle,i know i messed up somewhere?realy need my saw running,thanks

take apart your carb--sounds like your carb diaphram is not installed right the settings should be
1.5 turn out low jet
1 turn out high jet
that should get it running then some fine adjustment once its running

Sep 04, 2015 | Poulan P3314 14Inch 33cc 2Cycle Gas...

1 Answer


Both the high an low speed circuits should be at about 1.5 turns out from seated. Gently screw them in until they seat, then turn them back out 1.5 times. This should be close to the factory setting, but will likely need to be refined a bit from there. Start the saw and let it run for a few minutes. Adjust the low speed circuit at idle until it runs smoothly, then rev the motor to full throttle and slowly turn the screw out until it starts to run a little rough, then turn it back in until it clears up, usually about an eighth of a turn. If it still doesn't run right, it may need a carb cleaning and rebuild, or other work. Good luck.

Jul 01, 2014 | Stihl Garden

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If it has been sat for 2 years the fuel will have broken down so a full system flush with new clean fuel is a good 1st step.

If you have checked the carbs was there any sludge build up in the float chambers. If so I would dismantle and carefully clean with new fuel.

Make sure the tank is emptied and has not rusted. When you know you have clean new fuel. Try starting again.

When you get it running you need to use either a pair or easier 4 vacuum gauges to recalibrate the carbs.

This is fairly straightforward and a cheap set can be bought for as little as 8 pounds try Amazon. Obviously more expensive = better quality but if you are careful with them even a cheap set can be quite reliable.

Tip - Check each gauge against cylinder 1 for reading then you know if they are reading the same. Some are adjustable or just mark and set all to cylinder 1.

2.5 - 3.5 turns out sounds about right as a start point as you said.

Good luck

Mar 19, 2014 | 2009 kawasaki Ninja ZX10R

1 Answer

The bikes been sat for a couple of years now, in a warm garage however last week i tried to run it and it would start on full choke but when you add any throttle it just dies and even when warmed up to...

Yes, cleaning the carbs is needed. The main jets are plugged up. Standard factory settings for the air and pilot screws are one and one-half turns outward from a lightly seated position.

Mar 19, 2011 | Suzuki GSX-R 600 Motorcycles

1 Answer

How do you set the carburetor screws on a 1984 60cc yamaha 3 wheeler? There are 2 screws on the carb one is the idle and I assume the other is the high speed setting. I've adjusted them both all the way in...

Half right, one is the idle the other is the air mixture screw, which really only affects idle mixture. The mixture screw is usually about 1.5-2 turns out from screwing it all the way in. then when the bike is idling it is adjusted by screwing it in a little until it bogs down (rich), then screwing it out a little until the engine revs up and down(lean) and finding a smooth engine speed in the middle.
To initially set the idle, look down the carb throat and screw it in until it just starts to lift the slide.
But this doesnt help the starting problem, there may be a blockage in the carb, or if you have cleaned that already, may have to check further, many of those smaller engines need the suction though the standard air cleaner to run properly

May 15, 2010 | Motorcycles

1 Answer

Need to work on carb and clean the jets, how hard and where can i get step by step instructions

if you try to strip down the carbs you will need far more that a full set of instructions to get them woking right again,,,you need all the right tools to set them all up right, if one is running out of tune the bike will run like a dog,,,

Mar 20, 2010 | 2004 Honda VT 750 Shadow Aero

1 Answer

I need to set carb on a husqvarna 455 back to factory

Start with "H" and "L" 1 turn CCW from lightly seated. Then tune for performance like this.
Carburetor Adjustment by
CW is leaner; to lean will destroy the saw. If over tightened closed (CW) the adjustment screw faces are easily marred; marred adjustments are difficult to impossible to set properly.
Clean the air filter; adjusting with a dirty filter can cause a run lean condition once cleaned and the saw run.

There are 2 wav (sound - idle & full – may not be highlighted) files that I find most helpful, I think you will too. HTH

Feb 21, 2010 | Husqvarna , No.455 Rancher, 20" Gas -...

1 Answer

01 monster will only start after 15 or 20 tries or push start

Is it the 01 we're talking about here? The carbs sound like they need to be jetted. Did this just start happening or did you move? Just buy the bike from another state? Does it burn rich when it does run? Does the exhaust burn your eyes? I had a hard time getting my 99 750 to run right, the factory set jets didn't work so I bought a jet kit from Dynojet, and it worked perfect. It is adj also, so if you move up into the mountains you can adjust your carbs. Also had one of those fancy air filters on there, had to take it off, cause it didn't work right either, went back to stock.

Jun 09, 2009 | 2006 Ducati Paul Smart 1000 LE

1 Answer

I have a kawasaki kx 250 2 stroke an it was running good now it wont start. it has spark it wants to fire up but it just backfires.

hi murray,

nice bike you have there.

have you checked on the carb ans see if the jet is right and the mixture is normal, this is usually the case if the carb is not tuned right.

better of reset the card, open it clean it, then set to default even if you are using your mixture of gas and 2t. just set to factory default. once it starts give it a few run, 1-2 hours, then set it to how you want your mixture to be.

hope this helps,



May 17, 2009 | 2003 kawasaki KX 250

1 Answer

Poulan 1950

tighten the left screw and right screw all the way.
losen the left screw 1 full turn and the right screw 1.5 turn and that should be the factory setting good day.

Dec 27, 2008 | Garden

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