OP
@finatik avatar
UTC

Member
2002 ET4 150
Joined: UTC
Posts: 10
Location: So Cal
 
Member
@finatik avatar
2002 ET4 150
Joined: UTC
Posts: 10
Location: So Cal
UTC quote
I have an 2002 ET4 and need to replace the petcock. Can anyone tell me how to do this please?
@max6200 avatar
UTC

Banned
2006 GTS 250
Joined: UTC
Posts: 10590
Location: KS USA
 
Banned
@max6200 avatar
2006 GTS 250
Joined: UTC
Posts: 10590
Location: KS USA
UTC quote
Simple.

Disconnect the vacuum and fuel hose, unbolt the old one, drain the gas, and tighten the clamp when new one is positioned in place.

Reconnect the hoses, fill it up and you are ready to go.
UTC

Ossessionato
scooterless
Joined: UTC
Posts: 2085
Location: Googleville
 
Ossessionato
scooterless
Joined: UTC
Posts: 2085
Location: Googleville
UTC quote
Might want to drain as much of the gas as you can first. Siphon if necessary.
UTC

Enthusiast
gt200
Joined: UTC
Posts: 78
 
Enthusiast
gt200
Joined: UTC
Posts: 78
UTC quote
Try to run it Low on fuel and use a funnel to collect what's left.
@motovista avatar
UTC

Veni, Vidi, Posti
GT 2.4
Joined: UTC
Posts: 8794
Location: Watts, Cherokee Nation
 
Veni, Vidi, Posti
@motovista avatar
GT 2.4
Joined: UTC
Posts: 8794
Location: Watts, Cherokee Nation
UTC quote
Do it outside, not in your garage. You are almost guaranteed to spill some gas.
UTC

Hooked
2006 LX 150, 2008 Buddy 125
Joined: UTC
Posts: 425
Location: Eugene, Oregon
 
Hooked
2006 LX 150, 2008 Buddy 125
Joined: UTC
Posts: 425
Location: Eugene, Oregon
UTC quote
All of these tips are good.

There is one more way to drain the gas out of the tank before removing the valve, assuming this is a vacuum operated fuel valve. This method can be used if you don't have a siphon hose.

Remove both hoses from the fuel valve. One of the hoses is to deliver fuel to the carburetor, the other is a vacuum line to the intake manifold.

If this is a vacuum operated fuel valve there will only be a small amount of fuel in the hose that delivers fuel to the carburetor. As soon as you remove the fuel line from the fuel valve point it down at a bucket to catch the fuel that is in the line. At this point there should be no fuel coming from the fuel tank itself, unless the fuel valve has failed in the open position.

Then hold the bucket under the fuel valve and suck on the vacuum inlet on the fuel valve. This will simulate engine vacuum and the fuel valve should open up to allow any fuel in the tank to drain into your bucket.

You may need to find a spare piece of hose to hook up to the vacuum inlet on the fuel valve, making it easier to use your mouth to create a vacuum. Once the flow of fuel has started from the gas tank, stop sucking and put your finger over the end of the hose you are sucking on, that will hold the vacuum and keep the fuel valve open.

Once the gas tank is dry you can then replace the fuel valve and reconnect the hoses. This would be the perfect time to replace both the fuel hose and the vacuum hose if they are cracked or damaged in any way.

CAVEAT: If the diaphragm in the fuel valve has a hole in it there could be gas on the vacuum side of the fuel valve so don't suck on it with your mouth until you are sure there is no gas coming from the vacuum inlet on the fuel valve. If you aren't sure, instead of sucking with your mouth you can tape the end of a shop vac hose to the fuel valve vacuum inlet to create suction.

Good luck.
@scootchilla avatar
UTC

Enthusiast
LX 150
Joined: UTC
Posts: 62
Location: New York, NY
 
Enthusiast
@scootchilla avatar
LX 150
Joined: UTC
Posts: 62
Location: New York, NY
UTC quote
Instead of doing all that sucking, why not just run the engine to create a vacuum?
UTC

Hooked
2006 LX 150, 2008 Buddy 125
Joined: UTC
Posts: 425
Location: Eugene, Oregon
 
Hooked
2006 LX 150, 2008 Buddy 125
Joined: UTC
Posts: 425
Location: Eugene, Oregon
UTC quote
scootchilla wrote:
Instead of doing all that sucking, why not just run the engine to create a vacuum?
Since the fuel line has been disconnected, if you start the scooter it will run on the fuel left in the carb float bowl and as that runs low the bike will run lean. If the engine stalls the vacuum will stop and the fuel valve will close stopping the gas in the tank from draining. It only takes a second or two of sucking to start and maintain the flow, just like you would have to do with a siphon hose. The difference is with this method you don't have to buy a siphon hose.
@mc2 avatar
UTC

Lurker
ET4
Joined: UTC
Posts: 3
Location: San Francisco
 
Lurker
@mc2 avatar
ET4
Joined: UTC
Posts: 3
Location: San Francisco
UTC quote
tmfinch wrote:
It only takes a second or two of sucking to start and maintain the flow, just like you would have to do with a siphon hose.
Worked perfectly, thanks!

Had to disconnect carb to remove the fuel line from it, was stuck. Found a YouTube tip using pliers to grip and rotate stuck line. Now if I can only wrangle the air intake hose off...

There wasn't a hose clamp/Jubilee clip on fuel line at the carb. Should there be? can't hurt?
UTC

Hooked
2006 LX 150, 2008 Buddy 125
Joined: UTC
Posts: 425
Location: Eugene, Oregon
 
Hooked
2006 LX 150, 2008 Buddy 125
Joined: UTC
Posts: 425
Location: Eugene, Oregon
UTC quote
mc2 wrote:
tmfinch wrote:
It only takes a second or two of sucking to start and maintain the flow, just like you would have to do with a siphon hose.
Worked perfectly, thanks!

Had to disconnect carb to remove the fuel line from it, was stuck. Found a YouTube tip using pliers to grip and rotate stuck line. Now if I can only wrangle the air intake hose off...

There wasn't a hose clamp/Jubilee clip on fuel line at the carb. Should there be? can't hurt?
Ideally you want a clamp. But, to be honest the hoses are usually very snug and I doubt they would ever come off if you get it far enough on the carb inlet nipple.

If you are removing any hoses from the fuel valve, be careful to support the fuel valve with one hand while removing the hoses. The connection of the fuel valve to the gas tank is kind of fragile and if you twist on the fuel valve too much you could cause a leak in the area where the fuel valve joins the bottom of the gas tank. I speak from experience!
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