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Locate and adjust idle speed

Locate idle adjustment screw

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: nissan ga15 engine idle adjustment locations

The idle speed is computer controled, it is not adjustable, you most likely have sludge in the throttle valve and the idle speed control air bypass valve, clean them with carb spray with the engine running.

Posted on Sep 17, 2008

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SOURCE: Adjusting the idle

look on the left side of bike behind the fairing about where your knee would be look for a little knob rember righty faster idle lefty less idle speed be kind rate us

Posted on Jan 04, 2009

keemo68
  • 1263 Answers

SOURCE: Idle Adjustment Screw Location on 96 Civic

your idle can not be manually adjusted. it is controled by the ecm via the throttle position sensor on the throttle body(tps). you have to have a diagnostic scanner to interface with the ecm to adjust the idle. most service shops have this equipment

Posted on May 12, 2009

  • 1348 Answers

SOURCE: idle speed adjustment

the ecu drives a unit called an idle airspeed controller.if there is a vacuum leak,the computer will have the idle speed too high.
the IAC is a motor driven valve that controls airflow into the throttle body.it is common for idle speeds in the range of 1400rpm instead of 800 in this situation.
check the air filter,the throttle body cleaned,and the IAC has to be free moving.
also make sure that your coolant temperature sensor is accurate or the computer will think the engine is cold and keep the idle really high.

Posted on May 23, 2009

  • 110 Answers

SOURCE: how do adjust the mixture on a mountfield 470

Depends on what engine is fitted - but the chances are no adjustment is possible. The mixture is fixed, and the engine has a governed idle - which means there IS no 'idle speed' in the conventional sense.

If mixture adjustment seems to be required, the carb needs cleaning.

Posted on Sep 24, 2009

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It idles fast if I turn the idle down it stalls running rich on top end at fast idle sometimes it will drop to a very low idle and shut off


adjust the idle mixture screws first and then adjust the idle speed screw to compensate
adjusting the idle mixture screws will alter the idle speed but when properly adjusted then adjust the idle speed screw,

Aug 24, 2015 | Motorcycles

1 Answer

WEED TRIMMER CARBURETTOR ADJUSTMENT


Three screws. On some, there are only two screws. Some have only one screw. A few have none at all.

If there are any screws, one is nearly guaranteed to be an idle mix adjustment. With the engine warmed up & idling, turn that screw in (clockwise) 1/4 turn at a time until you can hear the idle speed drop a little. Back it out 1/4 turn and leave it alone. If the first 1/4 turn drops the idle speed, turn it OUT 1/4 turn and see if the idle speed rises more. When you get idle speed that stays the same when you make a 1/4-turn adjustment, go back to the beginning if this paragraph and repeat the first part.

If there are two or three screws, the next screw may be either an idle speed screw or a high mix screw. If it's an idle speed screw, turning it in 1/4 turn will immediately RAISE the idle speed and turning it out will LOWER the idle speed. Adjust that screw until the string head (that cuts weeds) isn't quite turning at engine idle. If it's a high mix screw, its only effect will be at full engine speed. If the engine sounds throaty, turn that screw in 1/4 turn at a time at full engine speed At some magical point, the engine sound should turn brassy. If you turn the screw in past that point, the engine will lose power because it's running too lean.

If there are three screws, then you have all three - idle mix, idle speed, and high mix.

There may be markings near the screws to identify them. Each manufacturer marks them differently, if at all. Some manufacturers simply rely on the screws' locations to indicate what they do. It'll be up to you to figure out which is which and make notes accordingly.

Aug 01, 2014 | Ryobi Garden

1 Answer

Where is the throttle screw(for idle speed), of the carb, in honda activa


That idle adjustment screw you are looking for can be found just below the fast idle cam. Which is connected to a spring-loaded hinge with a throttle cable attached.

Jan 22, 2014 | Motorcycles

1 Answer

What do you mean by LA in the chainsaw?


Locate the adjustment screws near the carburetor labeled with an "H," an "L," and an "LA." The "H" screw adjusts the high speed fuel-air mixture; the "L" screw adjusts the low speed fuel-air mixture; and the "LA" screw adjusts the idle speed.

Jan 14, 2012 | Stihl Saws

1 Answer

2000 FLHT Standard....How to adjust idle??


If your bike is equipped with a carburetor, the idle speed screw (throttle stop screw) is located on teh top right of the carb. You may have to remove the air filter cover to see it. Clockwise raises idle speed. If your bike is fuel injected, you can't adjust the idle speed, it's set electronically and you must take it to a dealer or a shop with the "break out box" needed to adjust the idle speed.

Good Luck
Steve

Aug 27, 2011 | 2000 Harley Davidson FLHT Electra Glide...

1 Answer

Cant find the idle screw


Hi allenplum,
There are 2 mixture screws, 1) the idle speed screw, 2) is the idle speed mixture screw. The idle speed screw is located on the carburetor, nar the throttle arm where your throttle cable is connected. There is a screw that you will find there that you screw in or out to speed up, or slow down the engine idle. The idle speed mixture screw is located lower down on carb and has a spring on it. There should be 2 screws side by side, one is the idle speed and the other is the high speed mixture screw. They are marked on the carb body, with the letter H or L . To adjust, remember the screw position before you do any adjustments. Start by turning the screw in (clockwise) all the way in until lightly seated, so no damage is done to the seat or needle. Turn out (counterclockwise) 11/4 inch, this should be OK to start the engine. Along with the idle speed screw, you should be able to get the correct idle required. With all the modernization happening, there might not be a high or low adjust as they are ported inside the carb. You might get just the high or just the low adjust needles. I hope this is helpful to you. All the best and good luck. Denis.

Mar 19, 2011 | Husqvarna "Chain Saw - 16" Bar, 3 Hp

1 Answer

Ok i have a problem with my Briggs & Stratton 16HP v-twin vanguard engine.When i start the engine and rev it up when i idles back down it sits there and rev's up and down then it straightens out and...


It appears that you have a slight mis-adjustment in the idle speed and idle mixture. To adjust setup, start with at least a half tank of fuel, and have engine at operating temperature (That is warm but not overly Hot). The Briggs & Stratton Website manuals section should show the locations of the adjusting screws if you are not sure of them.
To adjust idle speed set Throttle control to minimum and adjust screw on throttle butterfly to maintain a good idle speed. To adjust idle mixture, screw in idle mixture screw (Lean) until motor falters and then screw out (Rich) until it falters again. Correct setting is the halfway point of these two positions. You may have to re-adjust idle speed again and also the mixture to get best running.
If you are not comfortable doing this, take it to a B & S dealer.

Sep 21, 2010 | Briggs & Stratton Briggs Stratton Vanguard...

1 Answer

Wondering if anyone knows where the adjuster for the carburetor is located on a 2001 1200 Sportster custom


Unless the carburetor has been modified, the only adjustment is the idle speed. The Idle Stop screw is located at the upper right side of the carb. You may have to remove the air cleaner cover to access the screw. Clockwise rotation increases the idle speed. Adjust the idle speed with the engine at full operating temperature.

Jul 15, 2010 | 2001 Harley Davidson XL 1200 C Sportster...

1 Answer

There are three adjustments to the carbureter of the stihl wipper snipper model F585AV. One being the idle adjustment. one of the other two is the mixture adjustment. Question is, which is the mixture...


Low idle speed is one and high speed screw is the other. The idle screw is usually the one located closest to the throttle plate (closer to engine)

Feb 08, 2010 | Home

2 Answers

How to adjust air fuel mixture on a 87 suzuki samuria


On any carburator,one screw is for the idle speed, the other the air/fuel mix.Start the engine and let it get plenty warmed up. Adjust the idle screw to make the engine run slow. Turn the air/fuel screw in until the engine starts to die then out till it starts running loady.You want the screw between these two locations. Adjust it till the engine runs the fastest. Now adjust the idle speed screw to about 1000 RPM.
I hope this helps you.

Sep 24, 2009 | 1993 Suzuki Samurai

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