My little brother has a 1989 PW50 we have been working on for a while. It has a new piston/head and a few days ago after i got done cleaning the carb out, it ran great (finally) but it was leaking fuel out of the carb badly. I think i might have broke the tip off the needle valve and thats what i.. The petcock will be vacuum operated and if it has a leak, (on carb models), fuel flow will be affected. Also, the tank vent if blocked will affect fuel flow. Remove the fuel line from the carb, put end into a fuel safe container to stop fuel pouring all over the place generating a fire hazard, apply suction to the vacuum pipe on the rear of the. . Another thing to check is your choke mechanism and make sure it is moving and working properly. There is not an air adjustment screw on the PW50 the best I remember, so that is one thing you don't have to worry about
Wisconsin. So i found a PW50 for the little one. During the test at the sellers, carb starting leaking out the bowl overflow tube. Used it to knock the price down, got it home, cleaned carb, and ran fine for a bit. a few days later, started leaking again. Broke it down, cleaned, reassembled. Ran fine, then started leaking after 30 mins of riding To refurb the carb, thoroughly clean it (I think you already have) and replace #3 (main jet), #5 (pilot jet), #12 (float needle), check that #21 (air screw) is complete with spring, washer and rubber o-ring and is adjusted to the factory setting- usually around 3/4 to 1 1/4 turns out from fully closed. Also set the float height per the manual Put new gas in it, & also cleaned the air filter & the carb. & all the jets real good, & blew them out with compressed air. But the problem I'm having is when your trying to start it, I get gas leaking out of the overflow hose on the bottom of the carb. It only leaks while your kicking it, it doesn't leak at any other time Yamaha PW50 carburetor help: Maintenance and Repair: 28: Jan 26, 2009: M: Yamaha PW50 carburetor help: Maintenance and Repair: 40: Jan 12, 2009: CARB Red Sticker Clarity. Where are all the 2-strokes? Dirt Riders: 74: Mar 4, 2021: SC2 SMART Carb fuel leak: Maintenance and Repair: 2: Dec 3, 2020: CARB is out of control: General: 60: Jun 21, 2020. A fuel leak, starting from the carburetor's vent tube, can be worrisome affair for many motorcyclists. In order to fix the problem, you need to understand what causes the leak in the first place. The Basic Carburetor. Mikuni's motorcycle-specific carburetors use a float-type fuel delivery system. The float is a hinged valve that literally.
Carburetors may now be considered 'old school' but they have been doing their job for a very, very long time. Meaning that despite them been replaced by fuel.. bike, it starts leaking petrol through the overflow pipe from the carb hi, we have just brought a second hand yamaha pw50 for my son and when you turn the petrol on and start the bike, it starts leaking petrol through the overflow pipe from the carb. when you turn the pe Walbro Carb leaking fuel in oil when off. Kohler Carb # 12-853-118-S, CV490S Spec.# 27532 is the same Carb as Walbro LMK-95A. The Carb Kit to repair this problem is # 12-521-03-S. The Kit come with a Brass Seat, Tools and instructions on how to replace the seat. This Kit was made available in late 2009 Gas leaking out of the dirt bike is a symptom of a bad seal or gasket. The first step in fixing this problem is to identify the source of the leak. The common places that a dirt bike will leak gas is out of the fuel switch, the carburetor overflow, the fuel bowl, or the carburetor drain screw Nick, The only thing on the bottom of the carb should be the drain plug and the overflow. That is a drain plug, with an O-ring that seals the bowl. Take a look at the attached image and see if that is what leaks. The part number for that is 13278-02340 and it is readily available. The fuelcock... - Suzuki FA50 Mope
An expert that has over 10 points. Contributor. 22 Answers. Re: What are the carb settings for a pw 50 yamaha. There are no set settings for it screw in your biggest screw turn to undo 1 turn per try eventualy youll get there a pain but workted 4 me goodluck. Posted on Sep 02, 2011. Helpful 1 The only thing on the bottom of the carb, should actually be on the side of the carb bowl. That is a drain plug, with an O-ring that seals the bowl. Take a look at the attached image and see if that is what leaks. The part number for that is 13278-02340 and it is readily available. The fuelcock assembly should not be supplying fuel in all. Forum Main Tech Help/Race Shop PW50: Peeing gas / Oil leak on exhaust/cylinder area after cleaning carb. As for the peeing fuel, ur float is sticking or the fuel shutoff needle in carb that has rubber that the float hits when bowl is full is need of relplacement or adjustment. Go to pwonly.com for replacement parts cheap Re: PW50 Simple Fix for oil injector. We eliminated the whole oil tank on ours and just mixed the gas. Another tip is to shitcan the start/run switch on the handle bar when that breaks and replace it with a regular kill button. When we had ours that start switch was around 35-40 bucks vs 7 for a kill button Once you take the throttle plate off of the main body you can try pouring fuel into the bowl vent at the center of the carb (Little 5/16 in. tube that sticks up) with a squirt bottle but the fuel leak may evaporate as quickly as it leaks out. It depends on how bad it is. According to JB it should hold up to gasoline
A leaking gas valve can do more than just waste gasoline. If a leaking gas valve or carb float needle cause gasoline to fill the engine crankcase and you attempt to run the bike, the fuel is then pumped through the system washing oil from vital areas such as bearings. This situation is called gas washing the engine I have been having a problem with it leaking fuel. All the fuel lines have been replaced, but the leak is coming from a clear line that comes from the carb and does not connect to anything. I have had the carb rebuilt and the leak continues. It seems fine while I am cutting with it, as it doesn't leak while it is in use The fuel in your weed trimmer must flow uninterrupted from the tank to the carburetor, from the carburetor to the cylinder, and all excess fuel must return to the tank. This cycle needs to remain completely airtight, otherwise fuel will start leaking from either the broken seal or from another area in the fuel system
The Yamaha PW50 has a two-stroke engine and automatic transmission. Fuel induction is provided by a Mikuni VM carburetor that operates with a linkage-cable system. Sensors provide data to a capacitor discharge ignition box that interprets the inputs and provides optimum fuel and spark to the cylinder. The motorcycle. INNOGLOW Motorcycle Carburetor Carb For Yamaha PW50 PW 50 1981-2009 Dirt Bike Motor Bike 29mm. 4.0 out of 5 stars. 28. $25.99. $25. . 99. 6% coupon applied at checkout. Save 6% with coupon Carb Problem/ Fuel leaking out of vent. Tags float valve unsticking float valve. Jump to Latest Follow 1 - 14 of 14 Posts. J. JayChains · Registered. Joined Jun 24, 2012 · 4 Posts . Discussion Starter · #1 · Aug 6, 2012. I have seepage around the bottom of the carb, I have fuel leaking out of the vent tubes under the bike when its parked, I. Small Engine Carburetor Issues. Another common cause of gas leaking around air filters is due to carburetor issues. Fuel Float Issue: Designed to maintain pressure inside the carburetor by closing off the system at a certain fuel level, the fuel float can become stuck, resulting in gas escaping from the carburetor into the vent tube & air filter Niedrige Preise, Riesen-Auswahl. Kostenlose Lieferung möglic
I usually blow into the fuel line to the carb and gently turn the carb over to make sure the hissing stops before I put them (back) on. will get the floats to center and stop leaking. I've also opened the drain screw and blow into the fuel line to blow gas thru the float valve and out the bottom Finished my ride today and loaded the 2003 Grizzly on the trailer. I soon noticed fuel coming out of carburetor drain tube. The fuel **** was off but it would not stop. I moved the end of the hose to a point above the fuel tank and in a minute fuel started coming out of another drain hose that connects to the carb a little higher up Replace any fuel filters - There is usually one in the fuel inlet of the carburetor and often there will be an in-line fuel filter. Vacuum leak - Use spray carburetor cleaner and spray around the base of the carburetor and any vacuum lines. If the RPM smooths out, then you found the problem. There could also be a leak at the intake manifold A carburetor leaking down is generally a misconception by the enthusiast. Can the inside of the manifold under the carburetor be wet? Certainly. Can the fuel bowl be low? Also certainly. So if leaking down is a misconception, what causes the above? The answer is generally the volatility of modern fuel
I tried to start my '22 touring car today, after it had sat for about 6 months. It tried to start, would run briefly and then die. Gas is leaking out of the carburetor. It seems to be coming from somewhere near the bottom of the mixing chamber, not from the float chamber (although I might be wron.. After putting in kits every 6-9 months, the fix was to adjust the fuel float to specs. The fuel overflow and the drain screw share the same exit point. I have sold he 2000 Lakota in running condition. After many years, pulling the carb and putting in a kit could be done in 45 mins Honda carb leaking fuel. Thread starter Willith; Start date Jun 15, 2013; W. Willith Forum Newbie. Joined Jun 15, 2013 Threads 1 Messages 2. Jun 15, 2013 #1 My Honda lawnmower won't stop leaking fuel at the carburetta. I think it is leaking out of some kind of overflow pipe next to the air intake. I.ve checked the float valve and needle and. Ryobi 700r leaking fuel from carb. I have a weed eater that I can't get to start. The manual says to push the primer bulb 5-7 times but after I push it 2-3 times the fuel is running out of the carb. I took the spark plug out to see if it was wet. It was a little wet but not much. I have spark 3,787 Posts. #2 · Mar 26, 2010. The 250 has two hoses from the carburetor bowl. One is the drain and is operated by the small drain petcock located at the base of the bowl - it looks like a screw. The other is an overflow that runs the fuel out when the float valve leaks or the float is set too high. I would suspect the float valve is leaking.
I've got a 2004 Polaris sportsman 500 H.O. I noticed a lot of fuel coming from the carb overflow line both while running and while the machine is off. I figured it was a stuck float, bad needle etc so I put a brand new cheap carb on so I could keep using the machine while I cleaned the OEM carb up but it's STILL leaking gas from the overflow Another thing to check is the gasket between the main body and baseplate. Most carb kits come with 3 different base gaskets for 600, 650-800, and 850 CFM carbs. If the right gasket was not used it will cause the boosters to leak fuel and kill the engine. Never seen a warped baseplate cause fuel to pour out, mostly vacuum leaks I just recently purchased a B-112. It runs just fine except when you shut off the engine the fuel starts leaking out of the carb. We took the carb apart and found that the float had somehow got a crack in it and had filled up with gas so we emptied it and soldered the hole back up and tried that, but it still leaked This is float bowl drain on the bottom of the carb. I did much 'experimenting' on the jetting on my 2006 TE250. In the process I bent the float tab and gas would leak out when on the kickstand but not leak out when vertical. It occurred to me that was a good way to set the float level - adjust for it to leak when about 45 degrees from vertical
Noticed it was leaking alot of fuel so I took the cowling off and made it run and saw that on the bottom all the fuel was coming out of a round fitting with a hole in it. The fitting is on the port side, right above it is a barbed ffitting with a hose that runs to the starboard side of the carb In some cases the cylinder and crankcase will fill with gas, this stops the piston from moving, and is known as hydro locking. Removing the spark plug will release the fuel. Other signs that your carburetor needle leaks, are: over full oil level; white smoke from the muffler; oil leaking from the muffler; gas leaking from carburetor; strong smell of gas in the garage PW50 BIG BORE CARB KIT. Dollar for dollar the biggest power gain! This bolt on carb kit increases power all across power curve and its quick and easy to assemble. Stock Yamaha PW50 engine or full modified PW50 with big bore 60cc cylinder, this carb kit would be a huge advantage over stock OEM carburetor IGNITION PARTS PW50 Screw Conversion Kit $15.99 Quick View Add to cart PW50 Ignition Switch Assembly $25.99 - $34.99 Quick View Select options High Performance Spark Plug Wire & Cap $33.99 Quick View Select options PW50 Ignition Wire Harness $26.99 Quick View Out of Stock Read more PW50 Ignition Coil $29.99 - $39.99 Quick Vie
After the installation of the Chinese carb I started smelling gas so I found gas leaking from new carburetor so I figured I would install the original carburetor because I replaced cracked rubber hose. After installing it ran great it idled perfect. then I started smelling gas again it was leaking from the overflow tube at bottom of carburetor Apr 5, 2011. #2. Re: 2001 johnson 90 hp leaking fuel. Compression numbers are great. Can't tell anything from the top pic, the lower pic is unburned fuel coming from the exhaust which is not a worry. With the engine off, pump the primer bulb til it's hard and look for leaks. If it's leaking from the air box cover then you might have a stuck. If your leaf blower is leaking gas here are some things you can do to stop the gas from leaking: Fix 1: Inspect the fuel lines for leakage. Fix 2: Examine the primer bulb for damage. Fix 3: Check the fuel tank for damage. Fix 4: Inspect the fuel tank vent or check valve. Fix 5: Examine the carburetor and the carburetor gaskets MG Midget and Sprite Technical - SU carb leaking from float chamber. I've spent the last 3 days building a working pair of HS2 carbs and finally met with success except for one small issue. When under load fuel is leaking from the float chamber vents. Everything has been thoroughly cleaned, new valves have been used and when on tick over there. Once that is fixed the leak out of the throttle shaft should stop. Flooding caused by: Too much fuel pressure (probably under 5 lbs on cars that use the W-1 carburetor, but check your motors manual). Dirt in the needle & seat. This is the most likely problem. Test the float. If it is leaking, then it will be too heavy and the needle won't close
Carburetor leaking gas into air filter! Jump to Latest Follow 1 - 5 of 5 Posts. S. suzu · Fuel can leak into the lower parts of the engine that way which can interfere with the oil's ability to lubricate properly. If your oil is overly full or smells like gas get it out of there It is leaking from the large fitting that sits between the fuel line and the fuel filter inside the carb. To address it, I need to back off the fuel line fitting, re-tighten the fuel inlet fitting, and then re-tighten the fuel line. From experience I know that that fuel inlet fitting is easy to strip which just about destroys the carburetor SU & Zenith-Stromberg Fuel and Carburetor Symptoms & Diagnosis Before adjusting the carburetors, verify that the following items have been checked for proper operation. Many suspected carburetion issues are actually caused by faults within the ignition system, making this the first place to look before making any carburetor adjustments The float tells the carburetor when its fuel levels are too low. It then allows additional fuel into the carburetor to make up for it. If it's stuck, gas may not enter the carburetor, or there may be too much gas in it. Either problem could cause a leak. The simple solution is to gently tap the outside of the carburetor and see if the needle. Additional In case everything is alright, then lastly check the fuel line from the carb to fuel valve. Check the connection and make sure that the ring is tight enough and not leaking any gas. Sometimes the fuel line can be old and weak. Consider it by replacing the entire pipe. Because of the ethanol fix gas, these pipes don't last long.
Vacuum leaks are usually caused by intake boots that are cracked or brittle. A fuel leak from the carburetor will also disturb the air to fuel ratio because it's going elsewhere. Sputtering could also be caused by the carburetor being out of tune which means you'll need to adjust the air/fuel screw to ensure the right mixture 10pcs Carburetor Main Jet kit +10pcs Set Slow/Pilot Jet for PWK Keihin OKO CVK (Fits: Yamaha PW50) $18.57. Was: Previous Price. $24.76. Free shipping
Pay careful attention to where the fuel is leaking as it can further illustrate what's worn. If you're losing fuel from the throat of the carb, it's likely a ball check valve failing. The last possibility we'd consider is a failed gasket. This used to be a pretty rare event but lately, with the more widespread use of gasoline containing. startit.rs YF60 4-Zinger,1981-2017 PW50 Y-Zinger, PW50 Y-Zinger, Fits the following Yamaha models 1986 YF60 4-Zinger, We will give one-year warranty for every product, QT50 Yamahopper, YT60 Tri-Zinger,Everyday low prices,Great Brands, Great Value,Same day shipping,find your best offer here,provide you with high quality goods 2001 2002 2003 2004 2005 Carburetor Yamaha PW 50 PW50 50cc Y ZINGER Bike Carb. 1993-2002 Chevy Camaro Z28 RS Black Tail Lights Lamps Replacement Left+Right SET. 97-01. Fuel is coming out carb overflow. Carb drain screw is leaking. Sticking float. Dirty needle/seat. There are four main points of a dirt bike to look at when gas is leaking. The gas tank, the petcock, the gas line, and the carburetor. Gas Tank. Petcock/Fuel Shutoff. Fuel/Gas Line
First remove the fuel line from the carburetor and plug it so fuel does not run out. On the very bottom of the carburetor bowl there will be a small brass cover screw, using a flat screw driver, open this screw and allow all gas to drain from the carburetor system. Next, close the screw and reinstall the fuel line 04 pw 50, 08 ktm 50 jr pro I have a 2012 cr 144 and gas started leaking out of the overflow a couple of rides ago. I have had my carb apart about 10 times to clean it and adjust the float When trying to find the source of the leak, I started at the gas tank. Then I worked my way down through the fuel line, past the fuel filter and then right behind the air filter box where the carburetor sits. Yep, My Carburetor is Leaking. Bingo! When I reached my hand behind the air filter box, I could feel that the carburetor was damp with gas The engines have a faulty fuel cap, which can allow over-pressurization in the fuel tank, posing a risk of a fuel leak and fire hazard. Remedy: Repair. Recall date: February 6, 2018. Units: About 24,000. Consumer Contact
My mikuni carburetor leaks gas from the vent. The fuel level inside carburettor is directly correlated to the height of the float, as determined by the float tang. If the tail is lowered too far - bent to a position almost flush with the central bridge of the float - the height of the float, and fuel level will rise beyond the safety limit and. 7. I have the Quick Fuel 34-4 billet metering block on a 700 cfm 4150 and just discovered mine is leaking out of idle passage and draining the primary bowl after shut off. I thought it was leaking past the check needle in booster circuit. Nope. I need to know why this metering block is failure is happening
Help fix OS 40 Carb fuel leak. Pics inside. Evening folks. Wonder if you may offer any input to this.. I have an OS 40 max I believe. (Not sure, the airplane was given to me). Flown it about 3 times so far. Notice today that it was leaking raw fuel from the carburetor at the throttle linkage. I thought first this maybe normal since the engine. So I have an edelbrock 600 afb style carb. After it sits for a day or 2 it starts hard. I have determined the carb goes empty. I have also determined that it is leaking into the intake. I started the car, ran for a few minutes, shut it off, then loosend the 4 nuts that hold the carb down FCR39 Carb Leaking Fuel Saga. Discussion in 'Equipment' started by sweetlou, Jan 19, 2018. Page 1 of 2 1 2 Next > sweetlou, Jan 19, 2018 #1. sweetlou small body, big balls. Joined: Jun 22, 2008 Oddometer: 2,570 Location: Melville, NY
Edger: Leaks Gas. Check the primer bulb, grommet, fuel tank, fuel filter, and gas cap if your edger is leaking gas. Follow our repair and symptom guide to find the best way to fix this very common problem. This is a general guide for your repair; for more detailed information on your model, refer to the owner's manual I had fuel coming out of the overflow, replaced with a 100% brand new carb from John Deere. After fixing some other problems and SLIGHT carb adjustments it's running great, but after 20 minutes or so of driving its got fuel coming back out of the same tube! Pump (mounted on frame rail) turns on with the key with a pulsing type sound If you removed the fuel bowl or drain bolt and found no fuel flowing, or the carburetor needle is leaking gas into the oil. This guide will help you find and fix these problems, it works just the same for walk behind mowers, lawn tractors, ride-on mowers, tillers, snow blowers or any 4 stroke small engine '95 CBR 900rr 1 Carb Leaking Fuel - sometimes. Jump to Latest Follow 1 - 9 of 9 Posts. O. Old_Bourbon · Registered. Joined May 15, 2016 · 15 Posts . Discussion Starter · #1 · May 31, 2016. Hi gents I did several searches but can't find a similar issue.
2013-02-16T23:45. I'm having some trouble with a fuel leak in my Carter YF, stamped 938SD. It is dumping fuel below the bowl- not just a dribble, but a gusher (shiny parts in the picture). Best that I can tell, it is coming out of the hole for the pump lifter link, but it's also possible that it is leaking between the bottom flange and the carb. Turn the fuel line so the opposing end is pointed up and in line with the throttle valve (should be J shaped). Tie the line in place, try to keep the fuel line as close to the carburetor body as possible. Level the bike front to back, side to side. Put a drain pan under the bike. Open the drain screw 2 full turns
Results in: Fuel leaking at carb inlet. Fitting cannot be tightened enough to stop leakage. Comments: The early Q-Jets use a black, rubber-coated metal seal ring up against the hex nut part of the big inlet fitting as a fitting seal. Later Q-Jets use a white plastic seal ring at the end of the fitting threads as a fitting seal Mar 7, 2021. #1. 1978 fj40. Newly installed carb from A known vendor on MUD... carb was supplied as rebuilt from this person... installed and can get idle and rough running but lots of fine tuning needed to get smooth running. but I noticed a leak at the base of this carb. See image. before I start tearing it back off ANY immediate ideas to. Apr 2014. Posts. 918. If your carb is leaking fuel because you have a gravity fed petcock and you didn't turn it off, your float/needle is bad. Otherwise, if you were at a long light, idling, every motorcycle in the land would be leaking fuel. So, no you shouldn't have to turn off the petcock
If I set the petcock to off, the leak stops, and engine runs for awhile, until I'm assuming, the fuel in the carb is used up. While starting the bike, I also noticed if the choke is opened it's alot easier to start up and the leak from the carbs disappeared, but I then noticed a small bit of fuel leaking from the exhaust Carb Leaking Fuel? Jump to Latest Follow 1 - 14 of 14 Posts. darmo21 · Registered. Joined Dec 12, 2009 · 542 Posts . Discussion Starter · #1 · Jul 11, 2010 (Edited) So I get my build running today, started on the first push of the button~!.
67 Posts. Discussion Starter · #1 · Aug 18, 2013. My 8N Ford circa 1948 has suddenly started to dump fuel from the carb when it is not running. It starts and runs fine but when I shut off the ignition, shortly thereafter it starts to drip fuel out the carb. The only way to stop it is turn off the gas supply above the fuel bowl There is a float inside the carb and when the fuel bowl on the bottom of the carb fills up, the float rises and puts a small needle into a hole to stop the fuel from coming in. But if a tiny piece of crud blocks the needle, or the float gets stuck down, or the float springs a leak and stops floating, gas just keeps on coming in and it has to. zama carb leaking fuel. Jump to Latest Follow 1 - 10 of 10 Posts. T. TCT · Registered. Joined Mar 29, 2010 · 35 Posts . Discussion Starter · #1 · Sep 3, 2010. I have two zama c1u carbs that I have cleaned twice, the gaskets and diaphragms look fine (these carbs have not been kitted only cleaned) they will run but when you turn the eng. off. Carb fuel leak- where from? I have a 1970 Fiat 500 with a 126 652cc engine and Weber carburetor. Occasionally, I get a fuel leak just below the carb. The carb mounting plate between the carb body and the manifold (has raised edges along the outside) becomes full of fuel. (Picture of carb attached) Cleaning the carbs is a pretty easy job, it just takes a little time to get the carbs out. You'll know right away if they are dirty (and that could also be why you might be losing revs). It could also be the petcock gasket. When those start to go bad it acts like a carb leak. The gasket costs about $3 from Suzuki
Carb Leaking Gas. Jump to Latest Follow 1 - 18 of 18 Posts Filled up a squeezey bottle with fuel, ran fuel tubing to the nipple on the carb, and squeezed it....of course both bowls filled up, and the floats cut off the flow, and no overflow.... I unbolted the bowls, careful not to spill any fuel and checked the fuel level in the bowls. PERFECT The fuel line is connected to the fuel inlet of the carburetor, as it transports the fuel from the fuel tank into the carburetor. The fuel line is connected to the fuel inlet via a clamp. If the clamp comes loose you can sometimes see gas leaking out of the fuel line onto the carburetor Fuel pump was shot, the insulator/spacer was cracked, and the gaskets were gone. Replaced the fuel pump with a new one, new gaskets/spacer/insulator everything. Pulled the gas tank and cleaned it, put in new fuel lines and a new fuel filter. So, the carb is clean with a new float valve, new fuel pump, new everything that I can replace
Discussion Starter · #1 · Jan 9, 2011. Hello all, I have a mustang 200 inline 6 and i notice it is leaking a lot of fuel from the carburetor from two places. My friend said he cleaned out the carb and it was driving fine for about a month. Now it is leaking fuel and hestating. Any suggestion? I was thinking about purchasing a new 1100 vapor carb carb Rodney,the only thing i can think of is the fuel pump,i just cant imagine why two different carbs would leak.thats one problem that i have not heard of on here. did you buy the prowler with the carb leaking. how does it run. the only way it could be the fuel pump is that its pumping to much pressure,like someone put a high pressure pump on it.someone will chime in and help out. when i was. In the picture where the red arrow is, right where the threaded screw meets the carb body, POURS fuel out at an idle, and when the truck's engine was running above 2500 RPM it would hardly drip at all. It's also dripping on both sides of the carb, and you can wiggle it up and down 1/8, even when it's tightened down all the way It's leaking out of a hose next to the carb. It looks like a vent tube or an overflow of some kind. The hose is routed through the fake plastic cylinder cover and looks like it goes to the tank. Anybody know what this is or why its leaking fuel. Her bikes runs fine, just spewing gas out that hose. Thanks Holley Carburetor Leaks Fuel out of Primary Bowl into PV cavity. Tags carburetor fuel holley leaking. Jump to Latest Follow 1 - 17 of 17 Posts. HeavyChevyDeluxe · Registered. Joined Oct 21, 2013 · 393 Posts . Discussion Starter · #1 · Feb 17, 2015. Fuel leaking from carb. 10-21-2013, 05:51 AM. Looking for advice please. I have a Yamaha 85 aet pre mix power trim motor. I have found it has become very heavy on fuel. There is quite a bit of fuel mix ( the fuel that runs out is quite substantially oily) running out from the front of the carbs if I tilt the motor say when we get to a shallow.