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Fuel leaks from carby

@ zero turns no fuel 1/2 turn fuel leaks  motor runs ratty  should butterfly valve be closed on IDLE which screw is IDLE ONE IN Middle of carb  one is short one is long which should be where

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Snapper SS312 weed eater. Cranks when primed but won't run

I am sorry to say this, but the compression for that type of engine should be atleast 120 psi. Remove the muffler and look at the cylinder, it is scarred beyond repair.

Posted on Apr 22, 2009

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panilling9
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SOURCE: What are the factory settings for the

find L on your carbruetor and turn it clockwise 1/4 turn to see what difference it makes
it should begin to idle by itself?
zama carb. 1 turn out from closed
walbro 1and 1/4 from closed settings are only preliminary

Posted on Jun 14, 2009

rycgl
  • 1545 Answers

SOURCE: RE: MTD trimmer YM1500, 31

Most carbs have a H (running) and L (idle) mixture screws on them, but the newer ones are getting away from that somehwhat and some aren't adjustable. I am including a tech guide for carb adjustment for a Zama carb. All diaghram carbs are similar.
http://www.zamacarb.com/tipspage.html

Posted on Aug 29, 2010

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1 Answer

I have about a "67" 40 big twin. wont stay running. I have replaced the coils,points,wires plugs,fuel pump works, cleaned carb. it has 110lbs on both cylenders,they hold steady,


possible cause could be that the idle mixture adjustment for the carbys is out
find the adjuster screw and with the motor stopped turn all the way in then turn back out 1 and 1/2 turns start the engine and using the throttle to maintain engine running adjust each screw until the throttle is no longer needed
at that point turn one screw at a time in until the rpms slow then count the turns out until the rpms again slow , the turn in half that number of turns
at that point the carby is tuned for that cylinder
repeat for the other cylinder
failing that take it to an accredited bike shop and have it adjusted professionally

Oct 20, 2016 | Big Motorcycles

1 Answer

Why would my 1997 harley sportster xl 883 run hotter then usual & when it's hot and I shut it off it doesn't want to shut right off I can't figure . The carburetor was rebuilt. tune up was done .


I suspect that the engine tune up was not well done as a hot running motor after a carby overhaul indicates that it is running too lean
could be possible carby to manifold gasket failed or leaking or the carby bolts not tight
could be incorrect float level or the air /fuel mixture screw not adjusted correctly
if the carby has a solenoid near the mixture screw then if that is not working properly ,the motor will "run on" after the ignition is turned off as the pistons will still be getting a charge through the idle circuit that is being ignited by hot spots in the cylinder.

Aug 12, 2015 | Motorcycles

2 Answers

Motor runs at too high a speed. Throttle cable has no effect except to shut the motor off.


running fast would be a governer problem. wont idle sounds like a fuel problem. try cleaning carb. no power sounds like valve problems. if you feel profiecient make sure valves are sealing properly and ck. clearances.

Jun 10, 2013 | Heavy Machinery

1 Answer

350 holley diagram


Check for vacuum leaks--pipe to base of carby for distributor---vacuum brake hose. Check float levels check power valve diaphragm is not burnt or has a hole. Check the gasket at the base of the carby Screw both idle mixture right in then back each 2and 1/2 turns . Use the throttle until you can get the engine to run and reduce throttle until it idles on the jets.. Check engine timing and correct firing order.

Apr 28, 2013 | Cars & Trucks

1 Answer

1985 Toyota tarago 3y engine idles rough and seems to be pumping way too much fuel into the butterfly. Any suggestions on what to do?


There should be an adjustment screw on the side of the carburetor, controlling how much fuel the carburetor lets flow into the engine. You should be able to turn this screw with a small screwdriver, one direction lets more fuel in, the other lets less fuel. Its a guess and check on how much to turn it, do a little bit at a time until the idle clears up, then make sure the car runs correctly with your adjustment.

Jun 21, 2012 | Motorcycles

1 Answer

Honda CT 110 carby settings


Hi, Anonymous it should be noted that the "AIR FUEL" mixture screw adjustment "ONLY" manages your idle and has no effect on any other circuit also any intake leaks must be repaired before the A/F adjustment procedure can be performed otherwise you will never obtain a proper idle and you will waste a lot of time chasing the impossible. The A/F mixture screw's purpose is to fine tune the fuel charge entering the combustion chamber. The following applies to both 2 and 4 stroke engines:
1. The mixture screw may be sealed at the factory with a Welch Plug please review the following video for removal.
https://www.youtube.com/watch?v=wAXcksgvDkM
2. The mixture screw manages a range of 3 complete 360-degree counterclockwise turns from the bottom/closed position.
3. The mixture screw should have a spring and o-ring for tension and sealing integrity.
4. Turn the mixture screw clockwise until it gently bottoms out, this makes the fuel charge very lean and the engine should not idle if it does then the pilot/idle jet is too big and needs to be replaced with the next size smaller.
5. Turn the mixture screw 1 and 1/2 turns counterclockwise to establish a baseline for starting the engine.
6. To fine-tune the idle circuit, adjust the mixture screw 1/4 turn in or out to achieve maximum idle RPM, wait 15 seconds between each adjustment for the idle to settle.
7. Never go past 3 full turns out this will make the fuel charge rich, foul plugs, and produce black smoke out of the exhaust, if the engine RPM keeps increasing past 3 turns the pilot/idle jet is too small and needs to be replaced with the next size larger.
8. After achieving maximum idle back out the mixture screw another 1/8 of a turn then adjust the throttle cable idle stop screw to 950-1050 RPM.
9. This procedure works great on 99% of all engines, for the 1% that demand a more robust throttle response on aftermarket monster fuel delivery systems additional tweaking outside the box may be necessary.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
How to fix Carby problem on CT110 postie bike 40 postie bike chronicles
CT110 Carburetor Adjustment Honda Trail CT90 CT110 Forum
http://ct90-ct110.com/PDFs/C200_CT200_Shop_Manual.pdf
http://www.partsfish.com/page/oem-parts-for-honda
HONDA CT110 Owner Manual

Feb 06, 2012 | Honda CT 110 Motorcycles

1 Answer

Adjust carburator on homlite chain saw


Hi

If its an old Homelite you should have 3 screw on the carburator.
First bigger screw for adjust idle on the butterfly.
The 2 other for the mixture. One screw is ''L'' for low rpm mixture an other screw is ''H'' for high rpm mixture.

First the idle screw. It should just open a little bit the carburator butterfly.
Second full close both ''L'' and ''H'' screws (turn clockwise).
After open both ''L'' and ''H'' screws 1/2 to 3/4 turn (conterclockwise)

Normally the saw should start. Tune the ''L'' screw to have the motor running at idle if idle is to fast at this point is not important. After motor is running by itself at idle tune the ''H'' screw.
Full throttle tune the ''H'' screw to be able to pass from low rpm to high rpm with no lag.
Than at full throttle open again a little bit the ''H'' screw to make the high rmp mixture more rich.
Becarful if ''H'' screw is not adjust correctly the mixture will be to poor and motor damage can occur.

It may be necessary to re-tune a very little bit the ''L'' screw and idle screw after the correct setting of the ''H'' screw.

If it still not working carburator kit may be needed,

On some newer model there is no adjusting screws in this case see if a carburator kit is available for your model.

Feb 07, 2011 | Garden

2 Answers

1982 yamha maxim 650 turns over but wont start battery is charged, turns over fine just wont fire up


you need to do basic diagnoses - 1 compression test,should be better than 130 lb and if in good order around 170 and all cyclinders within 14lb. 2 - check and make sure you have spark at all 4 spark plugs. 3- check and make sure you have fuel in carbies by undoing drain screw in each bowl, if above 3 all ok you probably have stale fuel and will need to remove carbs and clean out jets. this model also suffers from worn butterfly shaft through carbs which creates air leak and the manifolds to the head also leak and **** air.
0

Jul 20, 2010 | 1981 Yamaha XJ 650

1 Answer

Will start with some amonut of choke on, but will ...


Carby carby carby!
Give the carby a flush with some Carby Cleaner. (retail 400g aerosol can)
Check condition and clamping of inlet manifold for cracks, warping or air leaks.
Reset Slide Needle one notch down.
Turn air mixture screw fully in and back out one and one half turns and try idling now.
When you get engine idling turn the air mixture screw in or out to the highest revs without use of throttle. Reset idle to optimum speed with throttle stop or idle screw.
Cheers.

May 19, 2010 | 2001 Yamaha SR 125

1 Answer

Engine revs up while idling


Check the Exhaust Valve actuating rod is firmly in it's bush and the actuating arm is screwed to the valve actuator...the diagram on this link below refers.
http://www.cmsnl.com/suzuki-rm125-2001-2005-usa_model16177/partslist/87624.html

Have you looked closely for air leaks between carby and engine, airbox obstructions or wrong sized pilot jet? Choke plunger thread not loose allowing extra fuel to surge through? Try turning air mixture screw IN half turn. The site below has the complete bike in exploded diagrams. Hope this all helps, good luck.
Cheers.

http://www.cmsnl.com/suzuki-rm125-2001-2005-usa_model16177/partslist/

May 10, 2010 | 2003 Suzuki RM 125

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