SuzukiSavage.com - fuel overflow

pokerpuss YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 20	Re: fuel overflow Reply #15 - 07/30/20 at 14:03:59 it only spits out when trying to start it. raw fuel is coming out of the drain tube under the bike? where would that be coming from?
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pokerpuss YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 20	Re: fuel overflow Reply #16 - 07/30/20 at 14:13:12 good advise not overfilling. I just don't have the know how to figure it out. cleaned the carb replaced air filter, new spark plug... ran great for 10 miles? can't go 2 blocks and it sputters out.
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norm92de Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1180 El Paso TX Gender:	Re: fuel overflow Reply #17 - 07/30/20 at 14:15:30 If you have fuel flowing out of the vents Versy is right. A float problem is probably it.
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28754 L.A. California Gender:	Re: fuel overflow Reply #18 - 07/30/20 at 14:15:50 the 2 vent tubes from the carb should be pointed up into the square tube of the frame. the drain tube under the bike is from the airbox. if it's coming from there, check float valve and petcock (if vacuum) the vacuum port of the petcock can fail and gas will flow into the carb. Then check your oil for gas too.
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ohiomoto Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 2681 WTF is JOG?	Re: fuel overflow Reply #19 - 07/30/20 at 14:31:09 pokerpuss wrote on 07/30/20 at 14:13:12: ...can't go 2 blocks and it sputters out. ----- That's classic petcock symptom. The other crap, I don't know.
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pokerpuss YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 20	Re: fuel overflow Reply #20 - 07/30/20 at 14:37:25 thanks for replying so quickly!!!! I am gonna ask... if I put the tank back on, and open the petcock to prime, and no fuel overflows. can I assume the float, needle and needle valve assembly are good? I replaced them with a carb rebuild kit from amazon. I have the boot from the back of the carb.off now. would that tell me anything?
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stewmills

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Re: fuel overflow
Reply #21 - 07/30/20 at 15:01:18

pokerpuss wrote on 07/30/20 at 14:37:25:

thanks for replying so quickly!!!!
if I put the tank back on, and open the petcock to prime, and no fuel overflows. can I assume the float, needle and needle valve assembly are good?

For the most part, yes. Prime bypasses the vacuum need and allows fuel to flow into the carb bowl by gravity, and if your float, needle valve, etc. are not working properly and seated then here comes the overflow of fuel! If not, you win!

You may also want to check your float height to make sure that none of the new parts got your float height out of whack. Usually it doesn't, but it is an easy thing to check with a small piece of clear fuel hose...the small stuff like what is used for weedeaters, etc.

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ohiomoto Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 2681 WTF is JOG?	Re: fuel overflow Reply #22 - 07/30/20 at 17:58:43 Classic case of fixing the wrong problem. If the diaphragm on your petcock is shot, fuel can flow through the vacuum line and bypass the float bowl. Plug the vacuum lines on the carb and petcock. Run it on prime.
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ohiomoto Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 2681 WTF is JOG?	Re: fuel overflow Reply #23 - 07/30/20 at 18:04:15 verslagen1 wrote on 07/30/20 at 14:15:50: ... petcock (if vacuum) the vacuum port of the petcock can fail and gas will flow into the carb. Then check your oil for gas too. -------------------- This!
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pokerpuss YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 20	Re: fuel overflow Reply #24 - 07/31/20 at 09:21:31 Thanks all! I will get back to it. QUESTION...clear hose for checking float height... I assume hook it to drain and let gravity do it's thing? where should the fuel level be? when I replaced the needle valve assembly I measured it. it was middle of tolerances... about 1.1"
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norm92de Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1180 El Paso TX Gender:	Re: fuel overflow Reply #25 - 07/31/20 at 11:17:39 The standard fuel level height is 7MM. below the flange. It is very sensitive to the slightest change in the lean angle. I measured mine at 5MM and didn't change anything. It runs great. The measurement you quoted is the float height: My comment above is as measured with a plastic hose held beside the carb.
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pokerpuss

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Re: fuel overflow
Reply #26 - 07/31/20 at 11:58:58

have the carburetor in hand, i'm blowing air into it, and it gradually decreases "air flow" until the bottom of the float is level with the stem of the pilot jet....then it cuts off completely.
again, I'm assuming, that is what it's supposed to do.

needle valve does cut off the flow.
So now, I want to put it back together and see what happens!!!
any thoughts before install the carb. and send fuel to it.
I'm gonna try filling it with fuel before I put everything back together

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norm92de

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Re: fuel overflow
Reply #27 - 07/31/20 at 12:45:55

With the bike absolutely level plug a clear plastic tube onto the float bowl drain. Holding the tube beside the float chamber pointed upwards the fuel level should stabilize at about 7MM below the bowl joint.

If you set the float height at the 1.1" level before you do this it should be correct. As I mentioned mine came out at about 5MM and runs just fine.

You won't need to put any fuel in it before you put it back on the bike gravity will take care of that for you.

When Suzuki designed the fuel system maybe they weren't aware of the ethanol in our fuel. Ethanol ruins the diaphragm in our carbs and petcocks well as any other device it come into contact with.

P.S. I hope that you have already installed a genuine Yamaha Raptor petcock. If not you will sooner or later.

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« Last Edit: 07/31/20 at 16:07:54 by norm92de »

2014 S40. Raptor. idle mixture adj.Needle raised one notch. 4000' altitude. Stock jets. Shell Rotella synthetic.

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pokerpuss

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Re: fuel overflow
Reply #28 - 08/01/20 at 13:31:31

still have fuel coming out of the overflow tube.
the float must not be floating?
With the float bowl off, I put air pressure in the fuel intake, and manually lift the float...cuts off just fine.
put the bowl on and can't see what happens, but it fills up and overflows out the "overflow" also into the throat of the carb. which I would assume was coming up the main jet.
I am really frustrated...
how do I check the float?
should I just replace it?
$50?

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justin_o_guy2

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Re: fuel overflow
Reply #29 - 08/01/20 at 15:27:05

If ts not adjusted correctly,, its gonna overflow
If the float is full of gas,, its not gonna float

Have you held the float in your hand?
Have you given it a good shake?
iF its got gas on the inside of it,, thats not okay,,
If the bowl is over filled before it gets to that spot where it shuts the valve
\Thats not okay
If Both of those things are true,, It Not okay

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