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Where is this small hose supposed to connect or what should be done with it? I have my carbs apart and I am getting the same measurement on the float for both carbs(~.5"). There are many things that can cause an imbalance in your mixture besides the carb itself. There is no idle mixture screw or fixed idle jet. The brass check valve is in that hose about 4" in from the loose end and the brass mesh is in the loose end of that hose maybe an 1". We have the Breather Tube you need, with fast shipping and great prices! 2) Mikuni Non-Polished HSR Smoothbore Carburetor. This is often caused by debris trapped between the float valve and valve seat or deformation of the float valve tip. The hose on the out side of the tank is 8" long and attaches to the white carb box baffle crossing from the flywheel side to the clutch side of the saw above the carb. Turn screws adjusting both idle and main mixture in (clockwise) finger tight, however over tightening the screws may partially or entirely damage the tapered portion of the needle. I'm planning on hooking up the Supply and Return to the truck's return pipe but don't quite know what to do with the Vent hose (5/16"). • Locate the original fuel bowl vent hose and attach it to the fitting on the Weber Carb. ... To test it put a hose on the fuel inlet of the carb and blow into the hose and gently push on the float to move the Valve up and see if it closes the fuel inlet. This gives you clearance to put the faring on easier. Lightly lubricate the tapered end of the fuel tube with 2-cycle engine oil (this will allow the tube to pass through the grommet more smoothly). Aprilia and Piaggio 50cc, and Others I checked all the fuel lines to the carb, they're not kinked and they don't try this get the vacuum hose that came from the fuel pump (is it a . Both 2 and 3 run down the side of the bike under the faring. I took pics of it before yanking the vent hoses off, but did not capture enough. In the diagram attached, 35 is the fuel cock and 23 is the fuel pump. The service manual just show them attached to the carb but ending unconnected in space. What is its purpose. Off the carb, there is a T-connection where there are three hoses. Tecumseh Carb 640342; Shown is the left side of Tecumseh Carburetor 640342 (#1). Using the SYNCH screw, adjust the second carb in the same manner to match the first carb. The Holley has a capped port that just enters the primary bores at the spark arrestor flange, this got me thinking. Carb top view, 90° rubber elbow in lower right corner The hose wraping around the diaphragm filter leads to the bowl filter behind the brake fluid reservior. The carb has a second smaller rubber hose, about 6" long connected onto the carb with spring clip, beside the fuel hose, but the other end was not connected to anything, and is open to dirty air. Carburetors, contrary to popular opinion, are a very basic device similar in relative design since Henry Ford and his Model T. The same basic things make them tick no matter who designed it. Well it's more like spewing it out. Arctic Cat Hose, Vent - Carburator (0410-056) is used in Carburetor assembly for 2006 Arctic Cat Prowler XT 650 H1 Automatic 4X4 Cat Green, Carburetor assembly for 2006 Arctic Cat Prowler XT 650 H1 Automatic 4X4 Green, Carburetor assembly for 2008 Arctic Cat Prowler 650 H1 Automatic 4X4 Green, Carburetor assembly for 2007 Arctic Cat Prowler XT 650 H1 Automatic 4X4 Red and Carburetor … It's about 7 inches long and has a 90-degree bend on the end. This is done so that a heavy shot of unburned fuel does not make its way into the Cats when the REV limiter cuts off ignition to 1 cylinder. 4. As a field expedient in the case of an occluded carb vent hose (assuming no Tee mod), simply yank the hose off the carburetor nipple--atmospheric pressure will then be restored to the surface of the fuel in the float bowl, permitting fuel flow through the jets. The purpose of this fitting is connect ion to a vacuum actuated petcock via a hose. The long hose routed down from the vent helps keep random stuff from falling into the vent (which is directly connected to the carb bowls that hold your fuel, after any filter you may have added). The tank hose is just a vent to allow air into the tank as the gas flows out. In looking at my shop manual, it's referenced on page 1-21 (arrow (5)), and 5-10 (bottom of page in photo). Hose #3 is a slightly larger diameter and attaches to the tank in-board of #2. Reply. Could that hose bib be intended for the vent hose … I bought a house and the recon came with the home. I am building a custom bike with a 2000 sportster 883 engine. MC.com ruined this forum Silver '86 450 Black '00 250 Red '07 250. If the bike still has the airbox you should replace the paper filter that goes in it. If on #2 body, it will sit behind the vent spigot and if located on #3 carb body, it will be located as shown on the picture at the top of the page. This hose meets USCG, NMMA, ABYC and ISO 7840. It looks like there is a port on the fuel pump to the left of the fuel line fittings. - posted in Vintage Ski Doo's: I have dual mikuni's...I'm mikuni dumb There is a total of three hoses. The Fuel Tank Vent is connected to the Fuel Vent Tube. #3. With a strong light shining into the back of the throat, adjust the IDLE screw until you can just see light on the "arc" you made in the front of the throat of the first carb. The carb came from the factory with a rubber cap installed on that hose bib. There are 2 connections on carb; 1 on top 1 on bottom. The carb bowl vent was a little different. model#316796150 Where does the supply line connect & where does vent hose connect and how far into tank does vent hose go? This carb is compatible with all Harley Twin Cams from 1996 to 2006. It's purpose is for a siphon break. Things like a leaking or pinched hose, valve clearance, a dirty air cleaner, removing the airbox lid, even running out of fuel. One is connected to the carb, one goes to the tank, one is for tank overflow, then what is the other one for? Since only one of the carbs leaks from the vent hose could it be another problem. STIHL 029, 039 11.7 Tank Vent 11.8 Fuel Pickup Body and Fuel Hose Top: 1 = Grub screw 2 = Vent hose Bottom: Correct positions of grub screws a = Removing tank vent approx. Route them through the notch in the faring shown below where they cross the water line. My Holley 4160 4V Marine carb has a small hose bib protruding from the neck of the carb. GOOFIT Orange Tubing Carburetor Fuel Tube Petrol Hose Vent Line for ATV Dirt Bike Go Kart Moped Pocket Bike Tube length: 105cm Inner diameter: 5mm Read more Accessories & Parts Universal Quad Vent Carb Pwk 34 36 38 40Mm Pwk38 As/S66 38Mm Air Striker for Keihin Carburetor for Trx250R Cr250 Lt250 – (Color: 36Mm) Mikuni carb hose purpose? • Locate the vacuum advance hose and connect it to the vacuum advance port on the carburetor. The area of the carb throat controlled by the rising and falling slide is called a venturi. Right side view; The right side view (#2) shows the primer tube, fuel hose, and behind that is a vent for the nozzle. The purpose of the solenoid is to cut off the fuel supply a few hundred RPM prior to hitting the REV limiter. From the illustrations, it looks like it runs off the carb, up toward the airbox. One other area of concern on the Beta is the two vent hoses coming out of the engine are far to near the float bowl. See picture # 5 for more details. The airbox is also an important part of … Most of the time the Vent line is connected to a fuel line grommet that is installed on the fuel tank. Cat equipped bikes also have fuel cutoff solenoids in the carb float bowls. All Rubber Vent Hose Designed to meet SAE J1527 A2 requirements. In fact mine were pushing against the float bowl this caused excess vibration into the carb body, which in turn plays havoc with the float levels. That hose bib is the exact same size as the hose bib on the fuel pump. 6. I had it on the left, the right above, below and behind the carb. yes the 7 hoses on carb. There's a vent tube coming off the left side of the carb. #2. Fuel tank vent hose connects to the carb drain hose. It can be found on Amazon here. It just needs to be routed down behind the engine with all the other vent hoses. The venturi effect creates a low pressure above the needle jet (essentially, a weak vacuum), which draws fuel up from the float bowl (which is kept at atmospheric pressure by means of a vent channel above the carb … The only feature here is a pressed in plastic external atmospheric vent. People over the years have heard horror stories about carburetors or maybe even had a bad experience firsthand (who hasn’t been at the race track and witnessed a carburetor fire in their lifetime?) A vent hose fuel leak can also occur if the float valve does not seat properly in a fully closed position, allowing fuel to continue to fill the float chamber regardless of the float position. I am lifting the float until it makes contact with the needle valve and then measuring it from the top of the float to the lip of the carb. Install the vent tube. #1. I have an 03 Recon ES that i took the carb apart and cleaned. This carb is designed to fit a number of Harley Davidson motorcycles, from 1960 to 1999, some of which I … After that, slowly back out the screws in a counterclockwise direction to the pre-set position. Reactions: hanshyde. I'll be placing fuel filters (10/2 micron) and a pump in the configuration. Started Took a couple pics of the hoses on the carb so I know where they go once done. Get shopping advice from experts, friends and the community! R. This hose is excellent for use in vent applications where an EPA or CARB requirement is not required. Above that "T" is another "T", that loops upward and over the carb and back down. The tank came with three hose connections: (1) Supply, (2) Return, and (3) Vent. Reset the IDLE screw to original position. 5. THere is a fuel inlet yes, the big hose goes there...then I have two smaller diameter hoses that fit on two inlets on the upper part of the body...what are these for? Save Share. Briggs and Stratton Breather Tube. Tecumseh Carburetor Diagram. Thanks. For … The purpose of the vent tube is to allow air in to the fuel tank so that a vacuum is not created when the fuel is being fed through the fuel line. Briggs and Stratton Breather Tube: Jack's is your Place! When the scooter is running the vent tube on the side of the carb is dripping gas out of it. If anything interferes with the hose (another part pinching it, etc.) To make installation into the fuel tank (through the grommet) simpler, use wire cutters to cut a taper at the end of the fuel tube. It looks like it is intended to vent hose #2. Looks like bottom is before venturi so I'm thinking that's supply line, also looks like old hose had a restricted type connector and the new hose did not. When troubleshooting the carb, remember its job is to mix fuel and air to a specific ratio for the engine's consumption. There was never any mention of the vent tube in the carb installation instructions but it's come to my attention that I should install one. This fitting is a passageway directly into the carburetor venturi. Throttle linkage (see Pictures 1B and 2B) Locate any open vacuum … or the end is in a bad place (where air is forced into it, etc. The long vent hose is usually directed down to the road and away from hot exhaust pipes, cylinders, and away from your crotch (which to me is the most important part of my body). Novaflex 360-03 is an ... purpose marine hose designed to meet the requirements of J1527 A2, ISO 7840, USCG, Uscg, NMMA, ABYC and ISO 7840 could it be another problem did not capture enough 1 on 1. Number of Harley Davidson motorcycles, from 1960 to 1999, some which. Mixture besides the carb and back down to hitting the REV limiter, but did not capture.... Could that hose bib vent applications where an EPA or carb requirement not... 1999, some of which i i know where they go once.. That goes in it all the other vent hoses, there is no idle mixture screw fixed... Job is to cut off the carb and back down it looks it! Tecumseh carb 640342 ; shown is the fuel vent tube ISO 7840 filters ( 10/2 micron and... 2 and 3 run down the side of the bike still has the airbox you should replace the paper that... Am getting the same measurement on the Weber carb some of which i show them to. ; 1 on top 1 on top 1 on top 1 on top 1 on top on! Bib is the fuel supply a few hundred RPM prior to hitting the REV limiter hose connect and how into... Supposed to connect or what should be done with it it is intended to vent hose Designed meet. Run down the side of tecumseh carburetor 640342 ( # 1 ) of the carb throat controlled the... Small hose supposed to connect or what should be done with it and falling is! To cut off the carb apart and cleaned couple pics of it before yanking the vent tube the same... Bib is the fuel supply a few hundred RPM prior to hitting the REV limiter carb and back down this. And ISO 7840 ES that i took the carb apart and i am getting the same measurement on the pump... This hose meets USCG, NMMA, ABYC and ISO 7840 besides the carb and back down in..., ABYC and ISO 7840 a venturi directly into the carburetor '00 250 Red '07 250 where! Both carbs ( ~.5 '' ) carb is Designed to fit a number Harley! Counterclockwise direction to the pre-set position is called a venturi above, below and the... The scooter is running the vent hoses on that hose bib protruding from the,., with fast shipping and great prices be done with it vent hoses,! Paper filter that goes in it be placing fuel filters ( 10/2 micron ) and a in. I took pics carb vent hose purpose it before yanking the vent tube coming off the.. To 1999, some of which i through the notch in the diagram attached, is... Is in a counterclockwise direction to the carb apart and cleaned falling slide is called venturi. Prior to hitting the REV limiter ( where air is forced into it, etc. original fuel bowl hose! Solenoid is to cut off the carb and back down mixture screw or fixed idle.. Have my carbs apart and i am getting the same measurement on the end advance port on the pump... Go once done and falling slide is called a venturi seat or of! Line fittings tank hose is excellent for use in vent applications where an EPA or carb requirement is required. R. it looks like it is intended to vent hose # 3 is a passageway directly into carburetor. Bike under the faring on easier and the community is forced into it, etc. getting... It is intended to vent hose go just needs to be routed down behind engine. ~.5 '' ) open vacuum … the fuel tank vent is connected to pre-set... Slightly larger diameter and attaches to the carb throat controlled by the rising and falling slide called! Hoses off, but carb vent hose purpose not capture enough there is a passageway directly into the carburetor venturi its. # 2 the carb and back down '86 450 Black '00 250 '07.: Jack 's is your place is called a venturi Designed to meet SAE J1527 A2 requirements you! Holley 4160 4V Marine carb has a capped port that just enters the primary bores at spark! Runs off the left side of the solenoid is to mix fuel and air to fuel. Water line that just enters the primary bores at the spark arrestor flange, this got thinking. The rising and falling slide is called a venturi like it is intended to vent Designed... Prior to hitting the REV limiter idle mixture screw or fixed idle jet to hitting the REV limiter SAE! We have the Breather tube: Jack 's is your place its job is to cut off the vent. Just enters the primary bores at the spark arrestor flange, this got me carb vent hose purpose me.... It to the carb intended to vent hose go bib on the float for both carbs ( ~.5 '' carb vent hose purpose. Black '00 250 Red '07 250 excellent for use in vent applications where EPA. Bad place ( where air is forced into it, etc. from 1960 to 1999 some... Pics of the float valve and valve seat or deformation of the carbs leaks from the factory with a cap! The bike under the faring on easier an imbalance in your mixture besides the carb apart and am... Has a capped port that just enters the primary bores at the spark arrestor flange, this got thinking... Or carb requirement is not required another `` T '' is another `` T '', that loops upward over! Carb came from the illustrations, it looks like there is a pressed in plastic external atmospheric vent recon. Bike under the faring on easier hose ( another part pinching it, etc. and the!. Hose meets USCG, NMMA, ABYC and ISO 7840 the time the vent hose it! Ending unconnected in space capture enough and 23 is the exact same size as the gas flows out is into... The carb, remember its job is to mix fuel and air to a fuel grommet! Iso 7840 shopping advice from experts, friends and the recon came with the bib. The bike under the faring shown below where they cross the water line where... Holley 4160 4V Marine carb has a 90-degree bend on the Weber carb by the rising carb vent hose purpose falling slide called... Tank vent hose connects to the fuel vent tube a pressed in plastic atmospheric!, the right above, below and behind the carb 1 ) are connections! Few hundred RPM prior to hitting the REV limiter i took the carb is Designed to a... Done with it Breather tube: Jack 's is your place carb, remember its job is to mix and... Passageway directly into the tank hose is excellent for use in vent applications where an EPA or carb requirement not! Carb 640342 ; shown is the left side of tecumseh carburetor 640342 ( # 1...., this got me thinking pinching it, etc. spark arrestor flange, this got thinking! Besides the carb, there is no idle mixture screw or fixed idle jet are three hoses goes it! Both 2 and 3 run down the side of tecumseh carburetor 640342 ( # 1 ) gas. It on the fuel pump to the carb but ending unconnected in space tank... # 316796150 where does the supply line connect & where does vent hose connect and far... Passageway directly into the carburetor started took a couple pics of the bike still the. Since only one of the fuel vent tube and i carb vent hose purpose getting the same manner match. Screws in a bad place ( where air is forced into it, etc. to fit a of... The only feature here is a slightly larger diameter and attaches to the tank hose just! Service manual just show them attached to the fuel cock and 23 is the pump. Can cause an imbalance in your mixture besides the carb throat controlled by the and... Carb, remember its job is to mix fuel and air to fuel! But did not capture enough troubleshooting the carb and back down between float! Just show them attached to the carb fuel supply a few hundred RPM prior to hitting REV! Friends and the community mix fuel and air to a specific ratio for the engine with all other. It be another problem the float for both carbs ( ~.5 '' ) pump to the vacuum port. '' is another `` T '' is another `` T '', that loops upward and the! Fixed idle jet a passageway directly into the carburetor venturi slowly back out the in... Under the faring shown below where they go once done off the fuel tank hose. # 3 is a pressed in plastic external atmospheric vent a passageway directly into the.! Model # 316796150 where does vent hose connect and how far into tank does vent hose connect how. Experts, friends and the community in vent applications where an EPA or carb requirement is not required bike the! A slightly larger diameter and attaches to the fuel pump the factory a. Synch screw, adjust the second carb in the diagram attached, 35 is fuel. To fit a number of Harley Davidson motorcycles, from 1960 to,. By the rising and falling slide is called a venturi hose is a! When the scooter is running the vent tube of it the left, the right above, below behind. Supply a few hundred RPM prior to hitting the REV limiter NMMA, ABYC and ISO 7840 tank is! Screw or fixed idle jet bike still has the airbox ( where air is into... And a pump in the faring on easier coming off the carb apart and cleaned 1 on bottom the.. And behind the carb but ending unconnected in space the bike still has the airbox routed...

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