Question about Peg Perego Vespa Scooter

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Fuel leaking from carburetor

With engine off fuel drains out thru carburetor

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  • svboyd
    svboyd Mar 19, 2014

    honda vespa not sure on model or year

  • Pete Warr
    Pete Warr Apr 30, 2014

    Can see the leaked fuel on the carb, ground or motor?



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Could be worn or sticking float valve, located in bowl of carburetor. to test turn off fuel, remove bowl from carburetor, gently raise floats all the way with finger, turn on fuel, it should not leak until released.

Posted on Apr 30, 2014


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Have K341s engine on a welder and crank case flooded with fuel. what should I look for?

It is likely that this engine has a gravity feed fuel system such as the lawn tractor in the photo. The problem is if the needle valve sticks open, float fails to push the needle into the seat fuel will flow until the tank empties. The fuel floods the engine and leaks by the valve stem and cylinder rings filling the crank case with fuel.

What a mess and always a concern when fuel leaks. The preventative is to make sure the fuel shut off valve is closed when engine is not being used. Usually running the engine with the shut off valve will empty the carburetor of gas a good procedure to prevent the carburetor from fouling.

You must drain the oil completly and replace before running the machine.

Likely with the engine vibration the needle will operate normally. Removing the bowl and checking for contamination is recommended.

Adding a new filter and confirming the fuel shut off is working is also recommended.





Jun 29, 2017 | Cars & Trucks

1 Answer

I have a Toro snowthrower Model 38472. How do I drain the fuel so that I can put it away for the summer?

Joe, page 18 in your manual tells you what to . Drain the fuel from the tank and carburetor by performing the following steps: A. Loosen the fuel-tank cap. B. Unscrew, but do not remove, the small screw on the side of the carburetor fuel bowl (Figure 33) until the fuel begins to drain from the carburetor. Drain the fuel into an approved fuel container. Important: Do not remove the carburetor bowl bolt on the bottom of the carburetor. Figure 33 1. Carburetor bowl bolt-do not remove 2. Small screw on carburetor C. Wait for a few minutes until the fuel has drained, then install the fuel cap and tighten the small screw on the carburetor. Note: Use a handheld Phillips screwdriver to tighten the carburetor screw. Over tightening the screw could strip it and cause leaking. 5. Dispose of unused fuel properly. Recycle it according to local codes, or use it in your automobile. 6. Remove the spark plug. 7. Squirt 2 teaspoons of oil into the spark plug hole. 8. Install the spark plug by hand and then torque it to 27-30 N-m (20-22 ft-lb). 9. With the ignition key in the OFF position, pull the recoil starter slowly to distribute the oil on the inside of the cylinder. 10. Disconnect the ignition key from the lanyard and store the ignition key in a safe place. 11. Clean the machine. 12. Touch up chipped surfaces with paint available from an Authorized Service Dealer. Sand affected areas before painting, and use a rust preventative to prevent the metal parts from rusting. 13. Tighten any loose fasteners. Repair or replace any damaged parts. 14. Cover the machine and store it in a clean, dry place out of the reach of children. Allow the engine to cool before storing it in any enclosure. The first link is a download for your manual. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
Power Clear 518 ZR 38472
Power Clear 518 ZR Snowthrower

Apr 20, 2016 | Toro Garden

1 Answer

I was riding my bike and came to a stop it shut down and started to leak gas out the air intake now it will not start. What do I need to check to fix this issue

The floater is stuck 'open'

Fuel dumping out of carbs / overflow- 1998 gas flowing freely ... > ... > Engine / Airbox / Exhaust / Fuel Delivery

Sep 18, 2011 - 15 posts - ‎5 authors
It will start / idle - sort of, but dumps gas out of the overflow/ carbs. I. ... If the carbs are over flowing while the motor is shut down one might ... to the bowls with outremoval of the fuel tank and maybe the air box or a ... valve/ petcock diaphragm drain line you see leaking below the bike. ..... Motorcycle Forum ...

What is wrong with my carburetor? - Instructables

InstructablesApr 24, 2012 - Shut off the fuel line, drain the fuel from the carb, disassemble and verify the correct ... Then I started to notice fuel coming out of the carb intake. ... the carb (blew air thru the fuel inlet), turn the carb over (float upside down) valve ... Carb still leaking gas at the intake connection, where the choke is located.

How to diagnose carburetor vacuum leaks on your motorcycle

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Feb 2, 2011 - Uploaded by mrmaxstorey
Not only did we have vacuum leaks, but the baffles were takenout of the engine, and the previous owner had removed the airfilter and ...

Carburetor / Carb Leaking Gas? How to Fix / Repair it ...

? 5:42

Dec 26, 2015 | GAS Motorcycles

1 Answer

My scooter is leaking gass won't run now

You may have a stuck carburetor floar. It will let fuel in the carb overfill to an overflow drain hose and the fuel pump only works when engine is turning. You will have to have the carburetor serviced.

Nov 20, 2012 | 2011 TGB 101S 50

1 Answer

There is oil and gas coming out of the carburetor. What is the problem?

The oil coming out of your carburetor is coming from your crank case. Either you have a stuck float, a stuck float needle, dirt in your carburetor, or you have a vacuum style petcock with a leaking diaphragm. Take apart and clean your carburetor. Drain your tank , take apart and inspect your fuel petcock. If the diaphragm is bad repair it with a K&L rebuild kit or put on a new petcock. Inspect your air filter if it is saturated with oil replace it and drain the excess fluid out of the air box. Also check your engine oil, if your crankcase is too full (gas/oil mixture) you will need to change your oil before running the engine.

Jun 27, 2011 | Suzuki Intruder LC 250 Motorcycles

1 Answer

Fuel over flows thru overflow tubes only when motor is running. motor off ignition on it stops.

Your gas tank petcock is diaphram operated.
there is a vacuum line coming off the intake, that goes straightb to the petcock.
when you turn the motor over a vacuum is created, pulling the petcock diaphram back and allowing fuel to flow to your carburetor. when you turn the motor off the vaumm is gone and the spring behind the diaphram pushes it closed and stops the fuel flow to the carbs.

Now the reason the carbs are overflowing is because the floats valves are not closing, in other words the floats are sticking.
Usually a good carb clean will cure the problem, especially for that year.
the older ones usually require new float valves/seats that are usually found in a good carb rebuild kit. You shouldn't need one.

If your really broke try tapping on the bowls of the carburetor lightly, while the engine is running, sometimes the vibration will vibrate a particle loose that may be holding open the float valve.
if it works then the fuel should stop overflowing while running.

if you know how to work on it, try this, with the engine off.
open the carburetor drain screws so that fuel will run out the carb. drain. flush out the carb.
get a container to catch the gasoline.
while fuel is flowing tap the carb bowls a few times then closed the drain screws.
clean up any spilled gasoline .
start your bike.see if they stop leaking and the floats are closing.
if it still leaks, you'll need the cleaning.

Happy Riding
Best Regards
Big Al

May 22, 2011 | 1997 Yamaha Royal Star XVZ 1300 A

1 Answer

Mower starts but within 3-5 seconds conks out. like it is not getting gas

The brass bolt that holds the bowl on the carburetor may be clogged. This bolt also is the Main Jet of the carburetor. Drain the gas. Remove the carburetor float bowl bolt and washer. Clean the bolt without using any metal tools. Pay close attention to the holes in the bottom and along the smooth length near the top. The holes are very small. Insert no wires or metal objects to clear this holes. This will restore correct fuel flow thru the carburetor and may solve your problem . Engines run without fuel filters and old stale gas and evaporation lead to and contribute to this problem.

Apr 22, 2011 | Garden

1 Answer

My brush cutter can start but only for a while. At the bottom of the carb there are leakage where drop of fuel can be seen. Plus I already adjust the throttle that can move the fuel intake nicely. I can't...

The engine slowly stopping sometimes indicates an air-leak somewhere on the machine. It could be at the carburetor to engine gasket, the crankshaft housing cover, the cylinder to crank housing bolts or even a crankshaft seal. More commonly it is the carburetor is sucking extra air thru a defective gasket, the screws on the carburetor's covers are loose or the rear crankshaft housing cover is leaking.

Oct 31, 2010 | Garden

1 Answer

Hi, Just bought a 2nd hand petrol lawnmower today on eBay and found that when adding fuel it leaks badly from the carburetter/primer area.. Whether primed or not. The mower is only 6 months old and in very...

The likely problem is a cut or abraded fuel line.

You likely will need to remove the plastic or metal engine cover to gain access to the run of the fuel line. Dry the area thoroughly and add fuel slowly watching for any leaks. Most leaks occur at the carburetor or at the fuel tank where it meats the fuel hose. A clamp should be used at both ends.

If this is not the problem, look closely at the fuel petcock on the bottom of the fuel tank. If it attaches with a screw, it may have a gasket that is leaking.

If the engine is a Tecumseh, look closely at the bowl at the bottom of the carburetor (if so equipped). There is often a bowl drain that has an O-ring that can become dislodged.

Sounds like a pretty easy fix as long as you can isolate the issue.

Sep 28, 2010 | Garden

1 Answer

How do i drain gas from 20hp 42in yard tractor?

The best way will be to take the fuel line off the carburetor or off the fuel pump, if so equiped, and put it lower than the fuel tank on the mower. Drain into a gas container. You can then put this gas in your vehicle to burn, rather than let it sit and go stale over the winter months.

If you are just taking the fuel out for the winter, and not for any other purpose, you can purchase some fuel stabilizer, called "Stabil", and put about 2 oz. per gallon of gas that's in your mower tank. Slosh it around a bit, start your mower and let it run, or take it for a spin around the yard to make sure you get the stabilizer mixed in well and down into your carburetor.

If you do drain the fuel for the winter, after you are done start your mowers engine and let it run the carburetor dry. That will keep it from evaporating too bad and gumming up your carb. Still a good idea to run some stabilizer thru the carb prior to draining the tank.

Oct 26, 2009 | Craftsman 20 hp 42 in. Deck Yard Tractor

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