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Echo PB250 blower carb problem

Wouls not run at high speed, kept bogging down. Bought the carb adjusting tool and set the high speed jet and ran as it was suppose to for a few days and started the same thing. Contacted Echo had they are having a lot of problems with the carb on these machines, they sent out an updated carb and it runs fine for now.

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ttr90 bogs down at high rpms


I have a ttr 90 that idles well but bogs down at full throttle. Carb is clean and has new pilot and main jets. Seems to run slightly better with intake off. Which leads me to believe the mixture is rich. No adjustment on carb. Stumped?

May 28, 2012 | Yamaha Motorcycles

2 Answers

42cc 18 inch craftsman chainsaw model 358-351910-18. Saw runs great at idle or while not cutting wood, when starting to cut wood just after the entire bar gets into the wood engine bogs down and chain comes to a complete stop.Please Help


Generally this is a fuel / air ratio problem. Usually it can be solved by a carb adjustment. On the carb there are usually two screws, one marked low or L , the other marked high or H. Low is your adjustment for idle mixture, high is for mixture at full throttle. The saw should Always be adjusted to run well during the cut. Make adjustments a little at a time, then try The saw. Continue small adjustments untill the saw is performing well at full throttle while Cutting.

Aug 09, 2011 | Poulan Pro Chain Saw 46cc 20"

2 Answers

i have a partner cutoff saw k700 active and when it starts it seems to run fine until itry to cut or put a load on it then it bogs down until i take my hand off the throttle after which it seems to idle fine. got any ideas?


There are a few things that could cause this problem, a dirty fuel filter, plugged tank vent, but most likely it is your carb adjustment.

Depending on which carb is used on that saw (EPA units have fixed jets and can not be adjusted).

If there are adjustable jets on your carb, open your low speed jet on the carborator yes, the low speed, not the high speed (the one closest to the cylinder) about 1/8 of a turn (counter clockwise) depending on the carb they used you might need to remove the limiter cap off the jet (usually made of plastic either grey or blue and it should pull straight off a small pair of needle nose with a bit of work will ususlly do it) Try it again under load, you may have to adjust a little more but 1/8 to 1/4 usually enough.

If opening the low speed jet doesn't solve the problem then the carb will have to be removed and cleaned and a carb kit installed.

Try that and let me know how that works for you.

Cliff

Feb 20, 2011 | Garden

1 Answer

husky 125B blower, new right out of the box. starts, runs about 30 sec, bogs and quits. I'm guessing likely needs carb adjustment, but set screws are not regular slotted screws. Looks like it requires a special tool. Suggestions?



Hello,
My name is Dane and I am going to assist you in solving your problem.

You will need to adjust the high speed setting on your Carburetor jet. Turning the screw out just 1/2 turn or so should do the trick. It is not so hard to adjust the Carburetor, however, yes you do need a special tool that is very hard to get your hands on, in order to adjust the jet screws. They don't make many engines with plain screw heads anymore. The newer Carburetors are factory set lean so they can pass emission standards. Since you just bought yours, a local husky dealer should adjust the mixture for free. I hope I've helped. If you found this reply useful, please leave me some THUMBS UP, if you feel I

Dec 09, 2010 | Husqvarna 28cc Hand Held Blower HVH 125B

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