Question about Poulan Pro 42CC 2 Cycle Chainsaw, 18"

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What is the (T) screw for on the carb. - Poulan Pro 42CC 2 Cycle Chainsaw, 18"

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The (T) screw on your saw is for throttle. This is for adjusting the revs of your saw when it is at an idle.

Posted on Aug 29, 2010

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When syncing the carbs on a 1991 Honda CBR 600 F2 there are only three adjusting screws to adjust them but there are four carbs on the bike. So how am I to sync the carbs with only three screws?


There are only three adjusting screws because you are adjusting them to the fourth, if you could adjust all four the possibilities would be infinite.

Dec 17, 2012 | Motorcycles

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Backfires


to much air when mixing with fuel in carb find air mixtur screw on carb an whale running turn in slowley till it stops backfiring turning the screw in adjusts the air mixing with fuel the screw is useuly located on the side of the carb witch the toub hooked up to put fuel in carb is
or you could re set it by screwing all the way in then screwing out 3 whole turns then whale running turn out til it back fires then turn screw in haf to three quarters of a turn in hope this helps

Nov 27, 2012 | Motorcycles

1 Answer

How do i remove the carbs from the engine?


After removing the tank and airbox, loosen the clamp screws securing each carb to the inlet stubs, these can be sometimes difficult to get at and time consuming, also unclip the idle screw from its bracket, remove the choke cable and throttle cable-s from the carbs, some models have water pipes fitted 1on each side of the bank of carbs, once removed have a screw ready to push into the pipe to stop the coolant leaking, if you have difficulty undoing the screws securing the carbs, grasp the bank of carbs from behinde, at the top pulling towards you normaly is enough to remove them as the retaining screws are not always tightly secured but often difficult to see, once removed you can
then prepare the screws ready for re fitting the carbs

Apr 17, 2011 | 2001 kawasaki ZX-6R Ninja

1 Answer

1995 FLSTF 80CI Carburator bike not passing emissions


If you're talking about simply adjusting the idle mixture screw, you need to turn the screw inwards to lean it out. But, if you can get to the idle mixture screw, your carb has been modified as this screw has a "anti-tamper" plug covering the screw. The mixture screw is on the back side of the float bowl facing upwards.

More than likely, it sounds as if someone has rejetted the carb. That year model CV carb came with a a #42 slow jet in the carb. The modification to make them run better was to go to a #45 slow jet. This was in the original Keihen 40mm CV type carb. You can try to adjust the mixture screw and see if that allows you to pass. If it doesn't, repost and let us know. Maybe we can help you rejet your carb. Good Luck!

Jan 26, 2010 | Harley Davidson FLSTF - FLSTFI Fat Boy...

2 Answers

My 1993 kx 250 runs great but it will not idle ??


ALWAYS have a fire extinguisher on hand when working on carburetors.

Drain the carburetor. There should be a screw on the lower side or bottom of the carb float bowl. Remove the screw then replace it after the fuel drains. Install a new stock NGK spark plug. Remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the idle screw and the air screw on the outside throat of the
carb and spray into the screw holes as well.
< < READ CLOSELY > >
Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two adjusters down. Only screw these in until they LIGHTLY seat. Now turn each adjuster one and one half turns outward. Put the rest of the
carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine.

Please rate this solution. Thanks!

Sep 14, 2009 | kawasaki KX 250 Motorcycles

2 Answers

Kids quad will not start


Install a new spark plug. Remove and clean the air filter. Spray some starting fluid into the carb and try to start the motor. If it doesn't start then remove the carb and clean it;
Drain the carburetor. There should be a screw on the lower side or bottom of the carb float bowl. Remove the screw then replace it after the fuel drains. Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the idle screw and the air screw on the outside throat of the carb and spray into the screw holes as well.
< < READ CLOSELY > >
Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two adjusters down. Only screw these in until they LIGHTLY seat. Now turn each adjuster one and one half turns outward. Put the rest of the
carb back together and install the carb. Let the float bowl fill then start the engine.

Aug 17, 2009 | 2003 Honda CRF 150 F

1 Answer

Bike won't stay running


Drain the carburetors. There should be a screw on the lower side of each CARB float bowl. Remove the screw then replace it after the fuel drains. Remove the water trap bowl at the bottom of the petcock, (gas valve). Is there any water or trash in the bowl? Drain a cup of gas from the tank. Is there any water or trash in the cup? Dump it, clean it and re-mount it, (not all bikes have a water trap bowl). Install new stock NGK spark plugs.

Remove the CARBS from the bike.
FOR EACH CARB > Remove the float bowl and clean the entire
CARB with a spray CARB cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the CARB. Remove the idle screw and the air screw on the outside throat of the CARB and spray into the screw holes as well.
< < READ CLOSELY > >
Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the
CARB back together, clean the air filter and install the CARB. Install an in-line fuel filter. Let the float bowl fill then start the engine.

BALANCE THE CARBS
Turn the throttle screw on the LEFT CARB one half turn inward. Now start the engine and get it warmed up. With the engine running, remove the RIGHT spark plug wire. Adjust the idle speed on the left CARB to the point where the engine just can't quite stay running and dies. Now put the loose spark plug wire back into place.

Now turn the throttle screw on the RIGHT CARB one half turn inward. Restart and rev the engine. Next, remove the LEFT spark plug wire. Adjust the idle speed on the right CARB to the point where the engine just can't quite stay running and dies. Now put the loose spark plug wire back into place.

SYNCHRONIZE THE CARBS
Remove the air filter and rubber fittings to allow you to see into the throat of both CARBS. You may need a mirror to see inside. You need to be able to see the slides go up and down when you twist the throttle. Now turn the fitting where the cable goes into each CARB such that there is just a bit of slack in the cable, 1/16" is plenty. Lock ONE of the cable adjusters down tight. All further adjustments will be made on the other CARB.

With the motor turned off twist the throttle very slowly while looking at the slides. Both slides need to begin lifting at the exact same moment. If the slides don't raise at the exact same time then slowly twist the throttle until the locked adjuster slide just barely starts to move. Hold the throttle still and turn the adjuster on the other CARB so that the slide on that CARB just barely starts to move also. Now recheck the slide movement timing. Do this process until the slides on both CARBS begin to raise at the EXACT same moment. Lock down the loose adjuster and re-check the slides.

Turn the idle screw on each CARB EXACTLY ONE HALF turn outward and restart the engine. The engine will be probably be idling very fast. Adjust both the idle screws equally from this point to get to the desired idle speed. Congratulations, you have just balanced and synchronized your CARBS This should fix the problem. One last and VERY IMPORTANT thing, Have a fire extinguisher handy and ready for use any time you work on or with he CARBS.

Please rate this solution. Thanks throttlejock!



Apr 22, 2009 | Suzuki GS 500 F Motorcycles

1 Answer

05 heritage it won't run unless the choke is halfway out


Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the idle screw and the air screw on the outside throat of the carb and spray into the screw holes as well.
< < READ CLOSELY > >
Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the
carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine. This process should get you back on the road.

Please rate this solution. Thanks!

Apr 17, 2009 | 2006 Enfield Bullet Electra

1 Answer

Jet cleaning on a 1988 sportster has ss carb


Drain the carburetor. There should be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the two screws on the outside throat of the carb and spray into the screw holes as well.
< < READ CLOSELY > >
Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine. Set the idle speed with the idle screw. This process should get you back on the road.


Please rate this solution. Thanks!

Apr 01, 2009 | 2000 kawasaki KDX 125

1 Answer

Bike cuts out and dies when slowing to a stop.


Drain the carburetors. There should be a screw on the lower side of the carb float bowls. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. Install new stock spark plugs and start the engine. If the bike still doesn't run properly then shut off the gas and remove the carburetors from the engine.

For each carb, remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray all the little airways and fittings in the carb. If your carb has them, remove the two screws on the outside throat of the carb and spray into the screw holes as well.

Be sure to put these two screws back in the same location they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the carb back together, clean the air filter and install the carbs. Let the float bowl fill then start the engine. This process should get you back on the road.


Please rate this solution as " FixYa " if all goes well. Thanks

Mar 27, 2009 | 2006 Harley Davidson XL 1200 L Sporster...

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