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Colton Farr Posted on Oct 30, 2017
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I have a 80 250 enticer with the old Keihin carb on it. It starts first pull on the choke but not without. once runninc it doesnt idle smooth and when it turn off the choke it revs to the point that the clutchs wants to grab than withing seconds dies. i can flip the choke back on and itll keep it alive but thats it

1 Answer

Bill Boyd

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  • Master 53,816 Answers
  • Posted on Oct 30, 2017
Bill Boyd
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Indicates that the air/fuel metering screws need adjusting

5 Related Answers

Anonymous

  • 53 Answers
  • Posted on Mar 29, 2009

SOURCE: rebuilt carbs-starts and idles but wont rev up without choke on

sounds like the main jets are partly pluged, you must remve all brass jets and seats including needle jet and its slide soak in carb cleaner and blow out with compressed air only.. hold up to bright light to verify if all are clean. jim

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Anonymous

  • 2559 Answers
  • Posted on May 12, 2009

SOURCE: 2003 honda crf 150 will

The carb jets need to be cleaned.


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Anonymous

  • 6 Answers
  • Posted on Jun 14, 2009

SOURCE: st185 Homelite string trimmer starts then dies

I resolved my problem by taking apart the carborator and cleaning it. There were clogged passaged that had stuff come out of them when I used airisol carb cleaner to blow them out. I only had to make one gasket the carb mount gasket which is pretty basic only 5 holes.
It ran for the next 3 hours, ran fantastic!!!!!!

Anonymous

  • 1 Answer
  • Posted on Jul 03, 2009

SOURCE: 31cc ryobi weedeater wont start

I've had similar trouble. I removed the plastic cover to expose the fuel lines. I've had to replace all of them as each one had dry rotted, split or had holes. There are four runs of clear plastic fuel line. Check all your lines and then check for any of it being plugged up to the carberator. The primer bulb should develop some pressure when all is good.

Knight 007

Murtaza Akberali Versi

  • 767 Answers
  • Posted on Jul 19, 2009

SOURCE: Honda shadow ACE 750 dies on idle after warmed up

I guess you will have to reset the air-mixture screws of the carburator/s.
Not bad if you check the condition of the spark plugs...if its ..'Whitish' means lean i.e. less gas in, Brownish...means ok, 'Blackish'...means too much gas in .....'rich'
In your bike's case you may find it 'whitish'.
Hope this helps !

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0helpful
1answer

Drop of petrol leaking from front corner of rocker cover when starting with chock on

new choke cable maybe. Or choke is not actually a choke like on a car. It is actually a fuel richener. There are three jets in each carb. The main jet, idle jet and the starter jet. The main and idle jet can be removed. The starter jet, which is key to the problem, is pressed in. It is the small brass jet by the main jet. This gets clogged very easily. You see, this jet fills a small chamber under the choke rod from the fuel bowl. When the rod is slid out of the way when you slide the choke lever back, the fuel in this chamber is pulled into the cylinder when it turns over. I had to use a very small stainless wire to clean it out. I used a wire cut from my wire wheel.

Disassemble each carb completely. Soak each carb in carb cleaner and wash off per instructions. Then poke the wire into the starter jet until it goes through. You will be able to blow air through it if it is unclogged. Once you do this it should fire right away and then idle. What you are doing by opening up your idle screw is allowing more air in to pull fuel in through the idle jet. Make sure you sync your carbs too. Smooth idle is also dependant on that.
0helpful
1answer

Toro GTS 6.0 hp idles up and down

Excess air or not enough air. Replace air filter. Spray outside of carb to clean & ensure choke movement is smooth. Water in gas may cause this also. Flush out tank, refill with fresh gas, always use Stabile.
2helpful
1answer

I have a 1998 harley sporters, runs only when the choke is pulled out all the way and when I try to back it off, it stalls. I had the carburator cleaned, but it still does it..Can somebody offer me a...

If your bike was allowed to sit up for an extended period of time, the gasoline in the float bowl evaporated and left behind this gummy mess. It has plugged up the jets and possibly the small fuel passageways in the carb. The carb must be completely disassembled and soaked in a professional grade carburetor cleaning solution. Then, compressed air must be used to check all the passageways to be sure they are open. No fuel is getting into the main venturi of the carb for some reason. The enricher circuit has it's own venturi and pulls fuel directly from the float bowl. This why it will run using the enricher and not run when it's turned off. I'd suggest that you take your bike to someone that knows what they are doing with a carburetor. If whoever did the carb did it right, it should run without having to use the choke. You didn't say whether your carb was the original stock carb or an aftermarket unit. If your carb is the stock Keihin CV carb and the "anti-tamper" plug has been removed from the idle mixture screw, set the screw at 3 turns off the bottom to start with and then fine tune the idle when the engine warms up. The idle mixture and idle speed are the ONLY things you can set on any carb from the outside. The fuel metering is controlled by the jets inside of the carb.

Good Luck
Steve
1helpful
1answer

My Yamaha Enticer 340 wont idle off of choke. What could be the problem? I have taken the carb off and cleaned all the jets. It idles on choke and will run off choke if the throttle is at half or full,...

your idler jetsa are blocked ,on this carb their should be an air screw as well so it might not be set right ,this air screw should be about 1-1/4 to 1-1/2 a turn out as a rough guide .Now another favourite trick of mine is to open the drain screw on the bottom of the carb then pull the feed pipe off the tank from the fuel shut off and fill the carb with brake and clutch cleaner ,spraw it down the pipe and leave overnight ,this will hopefully unblock any very small jets within the carb body ,Yes i know its a bodge and its not the correct way but it does work on old engine with carbs like my aux outboard or my motor bike .
0helpful
1answer

I have a 2000 Yamaha WR400F with a Keihin carb. It sat for a long time now it is hard to start and won't idle without the choke. I pulled off the carb, removed the jets and blew them out although...

I have recently had the same problem with my xr250r and have come to the conclusion that gas does eventually turn bad but gas with ethenal in it "goes bad qucker" I am now draining my tank and float when i park it and have not had a problem since!
Please vote if this helps
1helpful
1answer

Blowing out gas at the start. Drained and filled with fresh gas mixture. Cleaned spark plug and srayed carb cleaner in hole. Pull choke pull cord , blowing gas out of carb. Stuck float? Buy carb kit from...

No floats in chainsaw carbs. Severly flooded most common start problem with chainsaws. Read and follow the start procedure in your manual. Don't use choke on flooded engine (may set fast idle, set then turn off)!
Extreme Flooding by Dolfoff
Please follow this link, http://www.fixya.com/support/t3226410-no_spark_new_plug_but_continues_flood cursor down to “Best Solution”, while there click the “Was this helpful? [Yes]” button
Start Procedure
Cold:
  1. Ignition on/off to on
  2. Set compression release – optional step even if saw is equipped with a compression release
  3. Pull (close) choke, set fast idle (done when choke closed on some saws); pull starter and listen for an attempt to start. once heard (usually two pulls)
  4. Set compression release – optional step even if saw is equipped with a compression release
  5. Push (open) choke pull starter until it starts. (usually first pull)
Warm:
  1. Ignition on/off to on
  2. Set compression release – optional step even if saw is equipped with a compression release
  3. Pull (close) choke, set fast idle (done when choke closed on some saws) - Don’t pull with choke closed.
  4. Push (open) choke, pull starter until it starts. (usually first pull)
Hope this helps
Lou
0helpful
1answer

Want start

Read the warm start procedure from the operators manual.
1. Pull choke (sets fast idle)
2. Push in choke (fast idle retained)
3. Make sure ignition is on, pull (usually once on my saw)
4. Advance throttle slightly to release fast idle.
I made the mistake ONCE of not setting the fast idle. My shoulder gets sore thinking about it. HTH
Lou
1helpful
2answers

When chain saw is starte it goes to full throttle.

You understand there is a fast idle start position? If your saw is new it is triggered when the choke is pulled and remians in this position (even when choke pushed in) until the throttle is advanced once. Read your warm start instructions, it says pull clutch, push clutch, start. This is why we should buy saws from a chainsaw seller/mechanic NOT Home Depot!!!
I made the mistake ONCE of attempting to start mine without the fast idle engaged... my shoulder aches just thinking about it. GL
Lou
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