Question about Poulan 18" Wild Thing Chainsaw

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How to set carb. needle for 2500 poulan - Poulan 18" Wild Thing Chainsaw

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Posted on Jan 02, 2017

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SOURCE: carb. settings for poulan 3400

set both of them at 1 1/2 turns out and then fine tune it from there if necessary. This setting is usually right on. Hope this helps you, Jeepfxr

Posted on Jan 28, 2010

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SOURCE: high & low carb needle settings

I would start with both the "H" and "L" needle valves at 1.5 turns CCW from lightly seated then adjust for performance as follows:
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.
  • Clean the spark arrestor and muffler; if the saw cannot exhale it cannot inhale.
  • There are 2 wav (sound - idle & full - may not be highlighted) files that I find most helpful, I think you will too.
If you have more questions or need additional help please reply below and I will get back to you. Thank you for using FixYa and Good Luck. HTH

Posted on Mar 16, 2010

Testimonial: "thanks guys&gals i used to work on all this stuff as you get older you tend to lasp onse in awhile. thanks alot mack"

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1 Answer

When i pull the cord to start it gas is spraying out the exhaust. What is the problem

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check basics 1st fuel , air, compression, spark , timming
then secondary compression ie crankcase air tightness
2 strokes need air tight c/case in order to draw in & pump mixture

check your tank breather is working,

has this saw been sitting a while ? if so might pay to rekit carb

check your carby diaphrams are pliable and inlet screen is not blocked and metering needle is set flush with chamber floor,
are hi / lo needles set base settings are 1-1/4 turns out from lightly seated , final hi setting is done while @ full rev and needs to 4 stroke slightly

check ignition spark under load ie while under compression load- could be a weak spark

check timming key

check for a air leak at cylinder / manifold block gasket or carb joint

check barrell bolts are tight everything been = engine should run


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1 Answer

I have a problem setting the High and low carb needle adjustment tto get the right mixture. Is there a number of turn from fully close needle position initially required ?

try starting with both needles turned out one and a half turns, than fine tune from there. Make sure you are on the rich side of both when finished.

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Yes you have two float bowls, the carbs on your model is actually one set but they split in half, there is a needle and seat in each chamber and I would say that you likely have something caught in the needle and seats. I attached a diaphragm.


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