Question about Echo Gas Blower 135 MPH390 CFM Blower PB250

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Only runs on choke, will not rev-up. took exaust off did not change, fuel is filter clean, plug has been cleaned, new fuel and let idle till it got hot, still will not rev-up

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Your description sounds like fuel restriction in the main circuit. Sometimes you need to soak the carb in carb cleaner and then blow out passageways with compressed air.

There is one "cheat" but it involves some higher throttle, and that is you remove the air filter, rev up the unit and briefly place palm over the intake. Sometimes this is enough to pull the obstruction free.

Posted on Nov 06, 2010

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Replace fuel lines, they are cheep

Posted on Nov 08, 2010

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Strip the carb down and clean it with a air line

Posted on Nov 07, 2010

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1 Answer

Briggs Stratton 5hp I/C starts ok, runs, but will not rev


My money is on a partial blockage of the main jet or the passageway to it. You're having to force it to run through the idle jet by fully choking the incoming air. There's not enough gas coming in with the choke open to allow it to run.

I'm thiniking total carb disassembly, carb cleaner and an air compressor combined with a ton of patience will take care of the issue.

Mar 31, 2015 | Briggs & Stratton Briggs Stratton...

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I have cleaned the gas tank, fuel lines and rebuilt the carb. It now runs but just at idle almost in the choke position. I have played with the throttle and it wants to die when I move it to normal ru


if it runs only in choke it sounds like its lean (choke reduces airflow and gets back to a mixture it will run on.....just). It could just be a small bit of crud in the carby jet. You cleaned the fuel system.....did you install or replace a fuel filter? sometimes cleaning the tank and lines stirs up stuff that needs to be filtered.....even though you may had cleaned and rinsed out a lot.

Nov 22, 2013 | Electrical Supplies

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Poulan chainsaw, I rebuilt the carb with all new everything. Now it will start with choke all the way out. Idles really high. If I push choke in, it dies instantly. The hi-lo and Idle is off I know for...


get it running on idle,adjust the idle down till it runs hairy,then adjust low speed mixture screw till you get it highest revs,then keep repeating that till you get it idling normal.rev saw up max revs,adjust high speed jet, in or out till you get max revs,then screw out one quater of a turn.That lets enough fuel thru to cool the sparkplug tip..If thats no good,redo the carbi.Check the tiny filter under the needlevalve hole.Check the needlevalve diaphragm height.recheck gaskets are right way round

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1987 Dodge Dakota 3.9 engine, Holley 2 barrel. Having running issues. Bought the truck cheap cause it wouldn't run. Cleaned the carburetor and installed a rebuild kit. Starts right up and idles great....


Yes, the floats may be causing the fuel level in the carb. to be too high. The black plugs indicate running too rich. Clean the plugs and check the fuel level.

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1 Answer

2000 Yamaha WR400 wont run with choke off.


Hi, Anonymous and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Float needle and seat sticking.
5. Float level too low.
6. Carburetor bowl vent line clogged/blocked/pinched.
7. Idle adjusting screw set too low.
8. Air/fuel mixture screw set too lean.
9. Idle port, transfer ports, slow air jet clogged.
10. Slow fuel jet clogged.
11. Faulty fuel pump.
For more information about your issue and valuable "Free" downloads that you will need please Click on blue links below. Good luck and have a wonderful day.
WR400 won idle choke
Help 2000 wr400 won idle off choke What could it be motorcycles
YAMAHA WR426F Owner Service Manual
OEM parts for Yamaha
YAMAHA WR450F Owner Manual

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1 Answer

My 1982 Honda v45 will not run without the choke on. It sat in the garage for years with old fuel in the tank. We drained the fuel, changed all the oils, etc and completely REBUILT all 4 carburetors. I...


The slow jets and adjoining passageways are still dirty. As painful as it may be , take the carbs off and clean the slow circuit again or it will never idle. Double check the fuel pump is working properly and the fuel filter is not plugged. One time it took me four cleanings to get all four carbs working on a Suzuki that sat for five years. Also make sure none of the carburetor boots have developed rips from age.

Aug 31, 2010 | 1982 Honda VF 750 S

1 Answer

My 1991 suzuki gsf400 has erratic idling. also is hard to start.


This could be almost anything, probably minor. Good premium unleaded fuel, fresh/clean and gapped plugs, fuel filters clean,. Carbies clean and jets good, correct float levels, no air leaks in intakes, air filter clean, Electrical connections 100%, ignition coils OK, no sign of moisture behind magneto/stator cover or on source/pick-up coils. Engine earth wire secure from head to frame?
So....
New plugs, 0.7mm gap to start with and set air* mixture screw 1.5 turns out.
To flush carby with cleaning solvent (spray can from auto access.) Take float bowls off (check for sediment) and fuel lines off and spray till it pours out of float needle seat, Loosen carby clamps and swivel carbies outwards 90 degrees and unscrew pilot jets and spray thru also. Check operation and smooth return of choke.
* Air mixture screw controls fuel-air mixture at idle speed and is a trial and error thing. Pilot and Main jets regulate cruising and acceleration mixtures and ranges according to rider style and riding and climate conditions.
If there is any undue noise comming from the top of the engine with revs slowly rising from idle to 2000 revs, you may need to check camchain tension and valve clearances, easy done with some simple tools and a manual. Downloadable free with an engine search!
Goodluck and Cheers.

May 02, 2010 | 1991 Suzuki GSF 400 Bandit

1 Answer

Ruff idle


anti-thieft in key/ignition chip in steering column.Buy whole new switch and key..replace..reset anti-thieft software. ( No info in any book..took me also a year to find!)

Oct 07, 2009 | 1995 Pontiac Grand Prix

1 Answer

Husqvarna 142e will not stay running. Going through the sequence of full/half choke it will start and run at high rpm when choked. Even after warmed up, it will die within a few seconds after dropping the...


Hi,
If it is only running high at full choke - then it is not getting enough fuel.
You've cleaned out the whole thing - so it's not air that's the problem. It's running - so it's not a spark problem - it's a fuel problem.

If you have a fuel filter - change it out or clean it properly. If the fuel line is clear, then you need to adjust the running setting of the carb - there are usually 2 setting knobs -one for idle - one for running / mix.
You need it running richer till you get it going - then trim it back to stop it smoking and get a good rev.

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