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Posted on Jan 02, 2017
Carb has 2 nipples. top nipple gets line with filter on it from tank, bottom nipple receives line from bulb other side of bulb returns to tank
Posted on Mar 15, 2009
SOURCE: adjust high low screws on carb.
I just finished looking at mine and I think they made it that way so back yard mechanics dont tinker with it. If there is a Poulan dealership in yout area that would be the place to get it.
Posted on Mar 27, 2009
You will find that saws of recent production allow very little if any adjustment for the consumer. The carb will either have limiters which allow you less than one turn of adjustment or they require a special tool to make the adjustment. You will need to take it to a dealer to have these adjustments made. This is your government in action protecting you from that evil pollution your chainsaw spews out.
If you are able to adjust, then gently seat each screw and open 1 full turn. This should allow the unitto start and you can adjust from there. If it will not start you probablu need carb repair or replacement or you have other problems.
Posted on May 11, 2009
You will find a Low and High adjustment screw. At idle turn the screw in or clockwise until the rps starts to decrease. Then start turning it out till you hit max idle rpms. Turn screw back in a quarter to half turn and it should be idling smoothly. Be careful here and get someone to hold saw if necessary but hold in throttle to full speed and do the same with high adjustment screw. turn it in till rpm starts to drop then back it out until you get to max rpm and it won't go any higher then turn it back in a half a turn.
Posted on Jun 28, 2009
SOURCE: I have a Poulan Pro PP4218AVX 18
there should be 2 adj. screws going in to the carb marked L and H. Try turning the H jet in a little at a time and see if this helps. Or you can slowly turn it in all the way until you feel it stop. don't turn it any further in or you will damage the needle valve tip. Turn it out 1 1/2 turns and start the saw. It should run good at that setting. If not then adjust the screw in or out until it runs faster.
Posted on Aug 27, 2009
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