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Carby leeks from bottom over flow and can be hard to start

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1 Answer

How do I tune a carby for a Mitsubishi PM 1500 L Scorpion generator


pull the carby and clean it out
the indication is that there is a blockage in the main jet or not enough fuel flow into the carby
check filter in the tank above the fuel tap, check the fuel tap for flow
there is no tune up points as it is a basic carby to run the engine at set rpms

Jul 05, 2016 | Electrical Supplies

1 Answer

JD lawn tractor starts hard, can only idle and gas drips out of tube on carb until warm,it runs for 20 mins. then starts surging and dies,wait awhile, then starts.


try removing the carby and cleaning out the needle and seat area
the float pushed the needle up into a seat that can get hair , grass bits , dirt between the needle and the seat and then the fuel becomes uncontrolled and flows out the carby
I suggest a clean , blow out oul of the jets and work from there

May 13, 2016 | John Deere Garden

2 Answers

I have a toro z150 that won't start . I can poor gas into the carb and it will fire but stop.. Like its not getting any gas.. I have ran out ta stuff to look at..


Hi Kelly, Seems like the problem is needle stuck in seat, The needle and seat let the gas into the bottom of the carby and as the gas rises in the bottom of the carby the float rises as well pushing the needle up into the seat slowing the gas flow into the bottom of the carby.... As the motor's using the gas in the bottom of the carby the float's lowering and the needle lowers as well allowing more gas into the bottom of the carby, If a needle's stuck inside the seat NO gas(petrol)will be let into the bottom of the carby. Sign of a needle stuck inside the seat is unscrew the bottom of the carby from the top and if NO gas(petrol) in bottom then it's stuck, Pull needle out from seat with fingers and spray up seat with a carby cleaner and wipe needle as well, Replace needle and push needle up and down with float to check it freely slides again.... I hope you know what I mean... CHEERS..

May 05, 2016 | Toro Garden

1 Answer

Whats making carb flood with gas after bike is started and runs just a min or so then gas runs out carb over flow hose. I have replaced carb float and jets are all clean.


Hi Paige, Seems like the problem is where the float and needle meet, The needle and seat let the gas into the bottom of the carby and as the gas rises the float rises as well pushing the needle up into the seat slowing the gas flow into the bottom of the carby.... As the motor's using the gas in the bottom of the carby the float's lowering and the needle lowers as well allowing gas into the carby, If the part of the float that meets the needle is bent down slightly it's going to let more gas into the bottom of the carb because it's not pushing the needle up when it should, YOU NEED TO BEND THAT PART OF THE FLOAT UP SLIGHTLY TO STOP THE GAS COMING OUT THE OVERFLOW.... I hope you know what I mean....CHEERS..

Mar 28, 2016 | GAS Motorcycles

1 Answer

Flooding xj900


Hi I had the same problem after rebuilding my CB900 carbies a few years back.

The floats hang down so far in the carb that they actually get stuck down even when the fuel flows in after a rebuild.

Turn the fuel on and tap the bowls with the handle of a screw driver (plastic) I used a long shaft screw driver that way you can pretty much get all of them from one side.

This light tapping jults the floats and it allows them to pop up with the pressure of the full bowls if helps with them moving.

Hope this helps.

Oct 06, 2014 | 1990 Yamaha XJ 900 F

1 Answer

How do i solve coolant leeking from bottom of filler neck on expansion tank?


ck the over flow tank proper level whit engine cold dont over flow

Sep 21, 2014 | Cars & Trucks

1 Answer

Have been told I need to bleed ducati carby bowls, because that is why the bike won't start


if the fuel gets old from the bike sitting, it makes it hard to start. there is a small screw at the bottom of each bowl, undo them a couple of turns and fuel will flow out the overflow tubes, catch this in a clean bowl and see if any particles or water are in there as well.

May 02, 2011 | Ducati 750 SS Motorcycles

1 Answer

Hi i have a yamaha rz 250 85 model,it is leeking fuel from the carbys,i have replaced needle and seat but still it over flows fuel, what do u think the problem is?


Hello,

The problem is most likely with the float being stuck, or bad, in the carb bowl. If the float has become heavy, filled with fuel, then the gas will keep flowing through the carbs. The floats operation is when in the down position fuel will flow through the carb - when up fuel stops flowing.

If it has a float plunger, check it's operation for proper movement.

Hope this helps. If you find this information useful, please vote on this post. Thank you.

Regards,

Oz

Jan 15, 2011 | 1997 Honda VTR 1000 F Firestorm

1 Answer

Gas starts spitting into the bottom of the air box when starting


Hi Kevin, the fuel entering your airbox is likely coming through the vacuum hose from the top of the carby. You may have a tear in the rubber diaphram or the lip has curled or squeezed, allowing fuel to enter through the hose. If your bike is running alright otherwise, this is a relatively easy/cheap fix. The carby parts are available from/through all bike dealers and complete carby's are available secondhand from dismantlers or ebay at comparitive prices to the parts. The sight below has exploded view diagrams of your bikes components with parts lists for your ease of identification.
Cheers.


http://www.cmsnl.com/suzuki-dr200-se-2001-2005-usa_model15947/partslist/

Jul 15, 2010 | 2001 Suzuki DR 200 SE

1 Answer

Replaced diaphram fuel valve and carbs ..cannot open fuel valve all the way without flooding engine. Excess fuel poars from carb assembly. Could there be some sort of problem with the vacuum system that...


I would say the problem is in your carbys, with the float levels, or a sticky needle and seat. If you open the fuel valve, fuel will flow into the carbys, ans shut off once the correct level is reached. I think the problem is in your carbys, not the fuel valve. I would remove the carbys, take the bowel off the bottom, and check the needle and seat, and float levels. It is not recomended to change the float levels from standard.

Apr 27, 2010 | 1993 kawasaki VN 750 Vulcan

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