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Carb adjustment i need to know how to adjust the 2 adjustment screws on the carb and were they should be at for turns out. every time i thank i have them set. engine dies when i star to get into snow can get it to run great just setting there idleing. can anyone help toro cr20e snow blower modle 38116

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  • bill9932 Jan 22, 2009

    problem fixxed have no way to remove question

  • JERRY ABELL
    JERRY ABELL May 11, 2010

    hello bill did you get my request about the problem you posted,could you let me know,if not so be it.thank you.

  • JERRY ABELL
    JERRY ABELL May 11, 2010

    hello! you need carb. adjustment on what kind of engine??

  • JERRY ABELL
    JERRY ABELL May 11, 2010

    hello! Ok What Kind Of Mower Do You Have. What Kind Brand Of Engine,Horse Power; Let Me Know So I Can Hekp YOU; MrFixIt

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Screw both screws right in (don't force them) Then turn each screw out 1 & half turns each OUT. This will get engine running. To fine tune- turn low speed screw out, bit by bit, while idling, till engine revs change, then turn screw in till revs change, the correct setting will be somewhere between the 2 adjustments you just made. Do the same thing to the high speed screw, but with full revs. Good Luck. Stevo..

Posted on Feb 18, 2009

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I have a 92 golf 1.4 carb engine and its burning to much fuel for the emissions, Any 1 got any ideas howto solve this. Thanks


1 make sure the choke is not sticking
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Husquvarna chainsaw carb adjusting


Hi Mark
Before you remove or try to adjust your low and high speed jets you should always count the number of turns it takes to lightly seat the idle mixture screw and high speed needle adjusting screws.
Be sure to write the number of turns down on a piece of paper so you will know how many turns from the seated position to open the jets when you go to reinstall them, or if you remove them for cleaning or replacement.
If you have aready tried to adjust them then the adjustments below should get it running for you for final adjustment when warm.
Normally you will adjust your idle jet to 1/2-3/4 turn open from the bottom seated position.
Then you will re-adjust the low speed of the engine when the engine is warm by turning the idle screw in or out till the engine runs smoothly at idle speed, around 1200 RPM.
The high speed jet is adjusted to 1 1/2- 1 3/4 open from the bottom seated position, after the engine is warm.
Then re-adjusted by turning the High Speed jet adjustment screw in or out till the motor runs smoothly at high speed.
Alway use the "lightly seated" method if you have not changed the screw settings.
Please take time to rate me
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For a Homelite String Trimmer ST155CKD which has had it's mixture needle removed, how many turns back from fully in should needle be reset?


Hi and welcome to FixYa, I am Kelly

Turn it until just closed (fully in) then back it off 1.5 turns. Yuo will have to dial it in again...

For one screw type carbs... turn the H screw until it runs MAX speed and will idle.
For 2 screw carbs H & L screws adjust the L screw first until it idles and does NOT stall or hesitate when you MAX the throttle. Then adjust the H screw until you get MAX speed. Re-check for hesitation or stalls. Re-adjust L screw if necessar and dito for the H screw after re-adjusting L screw.

NOTE make minor adjustments each time.. not much more than the width of a screwdriver blade. Your final adjustments should not be more than 1/4 turn from where your started.

Set idle speed screw stop last on the top of the carb to get a decent idle.
This should get you going.
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2 Answers

Need to know about carb adjustment for tomos st sept 2010 question 1 the screw adjust questtion 2 finger turn adjustment what do either do and if totally screwed in how many turns out do i do...


LIGHTLY seat the air screw and the throttle screw. Now open both of them up one and one-half turns. Adjust idle speed with the throttle screw. Normally, the throttle screw sticks out about 1/2" to 3/4" from the throat of the carb. The air screw is short and usually recessed. If the screws have been tightened down anything more than lightly, the screw seat may have indented the screw face. If the face is ringed, the engine usually will not run well. The screws would need to be replaced. Please rate my answer. Thanks.
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1 Answer

How do you adjust the high speed mixture screw? I have a Ryobi RLH1100a MK III 31cc line trimmer, and after changing the fuel lines, it will start but not idle more than about 3 - 5 seconds before it...


Hi montex124, I will try to help. In the past few years carb makers have been making changes. Some carbs have no adjustment at all, the ports are all fixed inside the carb. Other carbs have only the idle speed mixture screw that can be adjusted, like yours seems to have. Is this screw you mention at the top and completely outside of the carb to adjust the throttle? If it is it's probably the idle speed screw which can be adjusted to any idle speed you want and has nothing to do with the air fuel mixture but If it is right next to the idle mixture screw, it might be the high speed mixture screw but is capped so it can't be adjusted. The low and high speed mixture screws should be marked next to each screw H and L.
The 1 1/2 turns suggested is sometimes just right but other times has to be adjusted, so you can try adjusting it to get your idle but maybe adjust the idle speed screw first to get a higher RPM so it doesn't stall on you. Like I said earlier it just adjusts the throttle, and is like when you are using it, and giving it gas as they say. I hope this helps just a bit. Regards and good luck. Get back to me if you need more help or just let me know how you did. Denis.

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1 Answer

I have a Briggs & Stratton 5HP Engine (Horizontal shaft) And it has the diaphragm carb on it. The last person to own it messed with the carb adjustments and it'll have trouble starting and idling...


2 turns out should get ya started adjust from there. If adjusting doesn't help you may need a new diaphragm. While you have diaphragm out blow through the 2 holes you'll see under diaphragm with air to hopefully avoid pulling carb off to clear screens on pick up tubes. Also check carb mounting screws through carb into tank. They frequently come loose on chippers and log splitters because of hard mount.

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1 Answer

Need to adjust my honda shadow 500 vt carburator's fuel/air mixture


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A “very helpful” rating for this answer? Thanks!

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Hi

high speed H=2 turns ,lowspeed L=2 1/2 turns
they are inscripted near the adjusting screws.

regards savumihai71

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