Question about 2001 Yamaha YZ 426 F

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Flooding on my 2001 426

I have a 426 yam 2001when i got it it didn`t run good. would run great when the choke was on so i cleand it 3 times.found some trash in it. but still run bad it would back fire when i would get on i sent it to the shop , had a vaule job and the carb cleaned and adjusted and still floods while riding. ihave to cut the gas off when i stop.cause gas comes out where the bowl drains.and it ain`t the drain screw.cause it stops when the gas is cut off.i think the choke is not working wright . but when i had it apart it wasn`t sticking ,no dirt was in that area when i cleaned it !!!! it has a oversize gas tankand aftermarket pipe don`t know if jets were changed.the shop said that it leaks cause it has high proformance parts.i wouldn`t know i never had a 4-stroke

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  • jeremy71 May 25, 2009

    what u mean seats

  • jeremy71 May 29, 2009

    Thank you so much . I've had it in the shop 2 times and it didnt do nothing but cost me money and lots of it. So once again thanks



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High performance parts do not cause the leak on other bikes. sounds like it is the needle and seat is not sealing or the o-ring around the seat is bad.

Posted on May 25, 2009

  • Jeff Policky
    Jeff Policky May 25, 2009

    High performance parts do not cause the leak on other bikes. sounds like it is the needle and seat is not sealing or the o-ring around the seat is bad.

  • Jeff Policky
    Jeff Policky May 30, 2009

    The needle and seat inside the carb. It is attached to the float, to stop the fuel flow to the carb when the float bowl is fill to the properer level. if it does not stop the flow then the fuel will over flow into the engine and out of the carb.



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Poulan leaf blower won't start

Check compression. 120-140 is good. over 100 it will run. Less than 90 is below service limit. Remove the muffler and look at the cylinder and piston. Do you see lines running up and down? a dull grey color? Those are signs that the motor is burnt up. The cylinder should be shiny, almost chrome, with no marks on the walls.
A severely flooded engine will give a false low compression reading. If no visible damage is found in the cylinder- its shiny with no marks- then reinstall the muffler, remove all fuel from the tank, open the choke, give full throttle and pull start cord several times. Maybe 10 or more times. If it starts keep the throttle open and let it run full speed until it runs clean. Then add good fuel and try to run. If it runs that's great. If it continues to flood itself the diaphragms are stiff and the carb needs rebuilt.

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I recently tuned up my blower. It starts great but if I turn it off Nd try to restart it it floods and will not start until I let it sit for awhile.

If the engine is warm and you shut it down, leave the choke off, lower the revs and start it. (when the choke is wide open you are using the fresh air coming in to dry the spark plugs and prevent flooding). If the motor is already flooded use that procedure to dry the plugs, then go back to full choke until it tries to start and quits again, then use half choke and pull one more time... works all the time.

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My 98 xr400 will not start. It seams to be flooded but it doesn,t even sputter if I don't move the choke at all. If I put the choke on half open it almost starts but then I think it floods. I changed...

Check to see if you have spark. Put a plug in the cap and touch the cylinder , kick it over to see if the plug is sparking. I kick mine 2 or 3 times to prime the cylinder holding decompression lever in. If it pops on full choke but does not start I go to half choke. If it does not start after 3 or 4 kicks , then I turn off the choke and kick it over 5 or 6 times with the decompression lever pulled to clear it. Then I will kick with no choke or half choke. Honda's are notorious for being cold blooded so when it starts let it warm up and do not be afraid to drive a short distance on half choke till the motor warms up a little.
When the machine is hard to start after sitting I usually start by removing the carburetor and shooting carburetor cleaner through the jets and passageways.I have always found my 96 xr400 to be a dependable starter with fresh gas and a clean carburetor. If it is flooded use the decompression lever to clear the cylinder.

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Shindaiwa Blower - when throttle pushed, engine sounds flooded and it dies. any thoughts on how to fix?

Its not flooded- its lean.
Heres a way to test me. Try to give it throttle but keep it running. At the same time slowly close the choke. does it run better as you close the choke? Does it run pretty good on half choke?
Rebuild the carb, replace the fuel lines and fuel filter.

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Starts hard floods easily even avoiding the primer

Prime away... on a chainsaw it does NOT squirt fuel into carburetor. It draws fuel from tank, through carburetor, and returns it to tank.
Using the choke however will flood it in a second once it has fired. with a good fuel supply, 99.5 % of chainsaw won't start problems are flooded.
Your manual start procedure should be similar to this:
Start Procedure
  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; no more than 4)
  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)
  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) – Do not pull with choke closed.
  4. Push (open) choke, pull starter until it starts. (usually first pull)
The real key on your Husky is to open the choke once it attempts to fire. Closing the choke sets the fast idle but leaving it closed only floods the engine once warmed up or after it attempts to start. True of Stihl too but slightly different start procedure.
If you can not find your manual you can download one here:
Enter the 3 digit model number (no XPs, Es, just the numbers)
Serial number decode – useful when downloading IPLs and Manuals
06 1500198
06 = year produced – 2006 (single digit before 2000)
15 = week produced - March
00198 = 198th unit Husky produced that week
Hope you found this helpful.

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1 Answer

The jet keep on letting out to much fuel

The float in the carb is sticking..Buy a can of carb clean and spray it down as good as you can..In every hole and what you can get to...Alot of times this will work without having to take it off and clean it..After you spray it down really good let it sit for about 20 min.That will give it enough time to break down theat old gummy gas build up..After letting it sit Start it up..You may have to hold the gas pedal to the floor in order to start it because of the over satutration of the cleaner..After letting it run for awhile let it idle and go under the hood with it still idling and rev the motor up and closing the choke at the same time..You may have to rev it up a little high..When you rev it up and the motor is racing quick close the choke and the motor will start to die down and rev it a little with the choke on..What this does is by closing the choke when its reving up is it sucks all that crud build up out .You may have to do that a few times but it works great..Good Luck and Have a great day

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Last time I STARTED MY VSTAR 1100 I CHOKED IT FOR 10 SECONDS ON HIGH THEN MOVED TO MEDIUM CHOKE FOR 4 THEN TOOK OFF AT NO CHOKE. 2 WEEKS LATER. I started up bike Choke on high bike barely wanted to idle...

Sounds like your flooding it out with the choke out. Try the next time you go to start the bike when it's cold with the choke out and when it starts push the choke all the way in and keep it running with the throtle. If it runs better after doing this then your flooding it on start up. Use 1/2 choke to start cold and see what it does. Good Luck

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You may need a carb rebuild kit. they are thin rubber diaphrams and will harden up and warp if not used regularly or if the fuel is improperly mixed.
These are easy to flood if you pull them too many times on choke. Pull it on HALF choke until it pops. then turn the choke off, into the run (I) position and pull it until it starts.
If it's flooded, remove teh plug under the cover, blow off the sparking end and pull the engine a few times without the plug. this will empy the cylinder. WATCH YOUR EYES!

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Yes its getting too much petrol , you will have to check the float pin, better to clean the carb.

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