airflow. Theres crap in the idle jets, the carb will have to be removed and cleaned. During this time, atmospheric pressure is acting on the fuel in the carburetor float bowl and pushing the gasoline (or pulling it, depending on the way you look at it) through the circuits of the carburetor. A carburetor makes small droplets from the jets while fuel injection makes a finer spray. Always start by looking for and fixing the most likely problems like fuel supply, clogged filters, corroded connections, burnt points, fouled plugs, etc. Pro tips for farm equipment repair and maintenance, 5 tire inspection points to look at before planting. fuel delivery system is to be used. Just go over all your steps when you put it together you must of missed something. life of me remember or recall a solution to the problem. The one that I have has a magnetic base that you place on the oil pan. and (B) vacuum. Make sure the venturi is in the right side up. Search. I tried but engine turns how should I safely Jam engine so I can remove this piece? carburetors; although we do offer rebuilding parts for the Scheblers and most Carter produced the BB updraft series carburetor beginning with the 1932 A note on Winfield carbs. $9.95 shipping. These models featured cast iron bodies, extended throttle shafts with much better. You need to be a member in order to leave a comment. It would even start with the hand crank at -40. Is there a technique? In selection of an updraft carburetor; one has the normal task of And yes you do need to be quick on the choke once it does fire-up. Three things need to happen to gasoline for there to be combustion. margin-left: 0; This is not really flooding at that point. The carburetor has tiny orifices that are called air bleeds. detail those designs that we will offer parts but will NOT either sell or 2. intake onto the ground under the engine. Questions of a Do It Yourself nature should be Carter recognized this fact, and came This item: Briggs & Stratton 394693 Carburetor Overhaul Kit. We normally have a decent selection of Each incident varies in accordance to individual use. When starting cold, ALWAYS use the choke. with gravity feed; thus requiring the installer to fabricate a much larger 11 hp Briggs and Stratton carburetor at the best price in the market. It sound like you must have a needle and seat problem or float problem. from the early zinc alloy, which falls to pieces. I hope this helps you solve your Flo Jet Carburetor Problems. The bottom of this carburetor now is about at the bottom of the crankcase. It is IMPERATIVE to know what Try some intake air heated by the exhaust pipe or manifold and your problem might just go away and the engine may run still better as well! Back to the Schebler, I'll have to make it work. Please let me know of your experiences driving your brass era car with an updraft carburetor. sizes (S.A.E. Carter BB-1 Troubleshooting Why is my Carburetor Flooding? There have been a number of other makes of replacement carburetors. With a cold engine, it needs the hand throttle opened about 1/4 of the way and pull full choke so that it is nearly flooding to start. Paul, that was my favorite butterfly / Choke Plate = the one with the poppet valve (made car much easier to run). One of the early hop up techniques for the Model A was to swap to the larger 1932 Model B Zenith carburetor. Copyright 2023, Antique Automobile Club of America. A driver controls the engine speed by increasing or reduction the flow of the fuel mixture. Check the viton tip for any scoring. The BEST fix is to solder a piece of brass tubing where the vent is, and route the vent line to a better location. I will admit a dislike jets, and most have power circuits. Same starting procedure. Opens in a new window or tab. Any gasoline drip or leak is something to be addressed, fire is a big issue with these cars. I owned a B414 IH, with an updraft carb. drawbacks: (A) weight (they are heavier than the Carter and the newer This critical setting is the primary way to adjust mixture on some Walbro carbs such as the WG8 used on Top 80 motors. Ships from and sold by Stoller Lawn & Garden Inc.. Get it Mar 9 - 14. Thehighendneedle trims mixture at mid-range through full power. Should the engine go lean, open the lowend needle slightly, if this dosent work you will have to adjust the needle valve inside the carb (will explain later). If no fuel, pump mat be faulty (check all lines on pump are not plugged and hooked in proper positions securely), line pinched/plugged, tank shut off either not on or plugged, filter plugged or installed . Designed by Elegant Themes | Powered by WordPress, Buyers guide for Walbro Carbs and Rebuild Kits. I've never replaced anything on this engine except the nuts for the setting the valve clearance. At 60F., only 50% of the fuel makes this change. . (SEE NOTE 2), the fuel leaks back into the gas tank when it isnt running, Bad fuel pump membrane, or an air leak in the fuel line at the carb. These are not removed normally and are not available. racing driver, as a spokesperson. When the float drops it will force the needle out of the seat.Wipe the needle viton tip with mineral spirits. I have always had to choke when cold on anything updraft. These are from the 1914 Schebler carb catalog. (D) fast idle parts (if the installer wishes the fast idle to function). Class E Surface Area Can we fly OVER it? These are used to emulsify the gasoline. If theres no hole drilled, you will find a fitting located somewhere on your crankcase. The small filter on the fuel-intake side clogs. Layden is right. carbs, and were basically designed for all-out racing. Virtually all of the agricultural and This should lower the float pontoon, and cause the float to exert its buoyancy at a lower fuel level, this helping to minimize leaking. Some time after, I had to adjust the valves every other 3 mowing periods due to the same issue. So there is no potentially excessive compression leaks through the valve train. Does gas leak out of the carburetor? Similarly to the Stromberg SF and SFM series, the Zenith 263 is A quick in-the-field remedy is to race the engine and, at the same time, choke the air intake by hand or with the choke plate. These carburetors, originally designed for agricultural use, may The mechanical pump is attached directly to the throttle and If you ever have an engine that suddenly refuses to idle, it probably has a clogged air bleed. Well, my diesel mechanic said I should change the oil and probably use a lighter weight for the winter, maybe I'll do that and see. Test this by getting on the hill which causes the problem, then disconnect the fuel line to see fuel comes out strong.Its possible the fuel is slopping over the float bowl which could be due to the wrong fuel bowl gasket. However, one needs to sometimes get creative (with Scheblers, often VERY creative). NOS Updraft Carburetor Zenith 013416 for Allis Chalmers 180 G2500. Poor engine was flat worn out no compression. I must admit this is a bit frustrating as I need to get the Regal on the road. Being the smallest fuel passages in an updraft carb this is a common problem. To test this remove the carb and fill with fuel then tip it the same as if it is on the hill. airvalve) carburetors with the lower energy content of modern fuel; (B) the The Daytona Zenith Updraft Carburetor Grab and Rotate the Carburetor See it in Use in our Users Gallery The New DAYTONA Universal Zenith updraft carbs come in a variety of sizes to fit various engines of displacement up to 300 ci. optimal performance, and generally doesnt work. Pop off pressure is how much pressure is required to pop the main-jet needle off of its seat. This has became the normal starting procedure. As the float heats up inside it will expand and force air out of any hole. Another place you can get a connection is the water temp cable connection. Tom. New pumps are especially suspect. standard sizes see http://www.thecarburetorshop.com/Carbshop_carbsizesandCFM.htm There's a fuel delivery problem. Carburetor Problems and Solutions. Either having the wrong spring, a cut spring or stretched spring can affect this pressure. Thomas Edfors. Lovely beast! Correct for 4 cylinder engine, model 4-52. determine the maximum pressure that may be used by the carburetor. #gallery-1 .gallery-caption { Gardner Car and Truck Repair Automotive Parts and Accessories for Cars and Trucks. C $277.43. You can connect a flexible tube to the air intake on the carburetor and place the other end near the exhaust manifold or exhaust pipe so the air coming into the carburetor will be warm. Scoring will cause the needle to stick. To see all exchange delays and terms of use, please see https://www.barchart.com/solutions/terms. Thank you for continued input. 49 sold. The original Schebler has am original flexible tube that took hot air from around the exhaust pipe for heat but, what I now have a brand new Zenith 12566 Universal Updraft and that is now what is on the car. In 31 Franklin went to using U-3's with choke plates that have a poppet valve. Check the condition and integrity of the High Tension and Low Tension leads. Carburetors are called updraft or downdraft according to their position. Equipped with a similar, slighlty upgraded flathead four-cylinder engine, the Model B Ford was fed by a slightly larger updraft carburetor (1 1/8-inch) than that found on the Model A (1-inch). New needle wipe the viton tip with mineral spirits. The customer would specify and engine, pumps fuel if the throttle is moved. This signal pushes and pulls on the pump diaphragm which feeds the carb fuel. This can create a fire hazard if a Alas, where I live I am the only brass era car 'nut' so I am on my own. Regular inspection of carburetor parts is recommended. The carburetor sits low almost to the bottom of the engine. to this site, and use it for non-commercial use subject to our terms of use. (within limits) but NEVER both. Tap the screw driver a few times. produced in sizes from S.A.E. $49.99. But the problem still remains. Free shipping. I know I have a tractor carburetor, which was recommended by a few other car friends, but no one told me the amount of fuel it would leak. included in the rebuilding kits; thus the rebuilding kits for Zenith are less Most updraft carbs not only need full choke when engine is cold, they need the hand throttle cracked open a bit, also. While that small difference in size may not . I would run it until it dies then check for spark, if thats ok then remove carb drain plug and see if there is fuel in the carb. 5. This also applies to carburetors with less than perfect float valves and gravity flow. Product Number: ACS156. If you have fuel condensing in that amount on the manifold walls you do not have enough carburetor heat. Had the local tractor "experts" baffled. different internal venturi sizes available. Check the ignition timing. I test them with bowl off then on to find the issue. You can have the idle mixture set properly, but if the power jet (which is a load-based fuel-enrichment circuit) is not correct, the engine will idle fine, but it will run poorly as the throttle is opened or the tractor is loaded. My engine four cycles momentarily when I back off the throttle, then runs normal, This is perfectly normal for carbs NOT equipped with a check valve highspeed jet. If the carburetor is not functioning properly, the engine won't work right, give the right horsepower, or run smoothly. AVS619 Today's gas has a higher boiling point to combat vapor lock, it gets very hot under the hood in modern cars. virtually no carburetor produced before 1925 (any many after) had these Go here for how to change pop-off pressure. Here is a problem we hear a lot about the Marvel Schebler carburetor.I have a marvel schleber carburetor. The mechanical pump is attached directly to the throttle and pumps fuel if the throttle is moved. If it is too low, the engine will have an off-idle stumble and be lean from that point to full load. Thank you for your help. Pressurized tanks should be "blown off" to relieve their pressure. | Orders | Contact Us | SELL TO US, Carburetors | Repair Kits | Other Parts | Literature | Tools | Articles | Troubleshooting | Carburetor Thank you for saving the tractors! The Official Online Store for Briggs & Stratton Engines and Parts Also, not uncommon to turn an updraft car off and have it puddle gas out onto the ground - there is a lot of gas in suspension in the manifoldswhen an updraftcar is running (most cars i have ever worked on or had there is some sort of drain that divers gasoline from puddling in engine pans). rotary throttle carbs have severe drivability issues for all except wide open If you have a gravity fed fuel system, then the needle may not be opening as it should. For related content and insights from industry experts, sign up for Successful Farming newsletters. Use a piece of fuel line to connect the crankcase fitting to the fitting on the optional pulse inlet. So far, I've only taken off the head. Maybe I should try 5/30? It still starts easily; but only runs about 3 mins. accelerator pump, a power circuit, or a fast idle circuit. It does make the car run better however and it likes hills better. Got it started once, turned it off, and it wouldn't start again. Just pulled out the mower for the first time this year, checked oil, belts, etc and adjusted the valve clearances. And a weak, slow starter motor can also cause poor intake suction hard starting. Winfield carbs were basically assembled at Around that time, Stromberg switched other model carbs over to that poppet type choke plate, including some smaller model updrafts. The bowl does not have to be on for this test. size 2); and 289s (S.A.E. Once can obtain different thickness of mylar, and cut a spacer to place between the float arm and the float pontoon. The flange sizes vary depending on the size of carburetors. Started it again, same thing, but after 20 seconds it sputtered and started knocking. items that require service or repair, or items missing essential components. Price: $299.99. I understand the technical issues with carburetors but what I need now is a concrete solution that will get the Regal back on the road. procedure, unless the installer is extremely lucky, will result in less than throttle use. (may be a restriction in the shut off or fuel bowl assy. updraft except the fast idle circuit. engine tank heater items - Get great deals on eBay Motors, Business Industrial items on eBay.com! Zenith has made a mind-boggling assortment of models over the years. older vehicles. seem to be: (A) incompatibility of the automatic designs (especially The job of the carburetor is to do the first two. I know not if it is original but it was on the Regal when I got it and the car was unrestored. Check carefully for any cracks. They have only two )Also, he needs to be certain that his fuel filter is clean and that the pipe coming out of the fuel tank to the filter or pump is not corroded inside or otherwise restricted. The vacuum accelerator pump has a Fits Allis Chalmers Zenith Carburetor Bowl Gasket Set Kit B C CA WC WD WF . If the topend runs OK, then slowly pull the throttle down until the engine begins to four cycle hold the throttle there. than the artificially high price) is the mechanical accelerator pump. . The U-3 is a bit on the large side for that CID. We provide a variety of Updraft Carburetor for your vehicle needs. Or else your float valve may need to be re-adjusted, or replaced (due to wear on the needle valve and seat), to lower your fuel level in the carburetor float bowl. A new modern material float was made and installed and that is when the trouble began. He did not wish to apprenticeship his first-born to acquire a set of Johnsons, and asked what options he had. When Parked on a Hill Carburetor StumblesIs the level of the fuel tank about the same when this happens? I think the post-shut-off drips you are describing are normal providing the drips stop after a short amount of time. It isnt uncommon for a Marvel Schebler to have gas drip out of the air horn while sitting around. #2. size 2. Tom. Hello Layden. Go to full throttle. A good example is the Stromberg U-3 on the 1930 Franklin - I choked it every time I ran the car no matter cold or hot. Being a updraft carb, excessive choking causes gas to run out of drip hole in carb even if carb is working correctly. Show me an engine with an updraft that starts well cold without choke, and I will show you a vehicle that gets less than efficient fuel economy. Post in the forum instead. expensive. main metering jet, an accelerator pump, an adjustable idle circuit, and a The rounded lip would be up. Ed - someone revived this thread, and I again read your comments. Most updraft carbs not only need full choke when engine is cold, they need the hand throttle cracked open a bit, also. Did you replace the float? I hope to take the Regal on some tours this year. I would NOT make an adapter or reservoir to capture the fuel as it is better for the fuel to go on the ground since it will evaporate quickly (unless there is too much of it, or it continuously drips). If the valve clearance is set right, what would cause it to turn smoothly only if the intake is covered when cranking? With the exception of the Zenith 161, all of the universal carburetors come with an adjustable jet so they can be tuned to your particular engine. We use to comment that pouring raw gas into the engine from an old boot would be a better fuel delivery device than a Cadillac Johnson carburetor. This article will address in Another common idea was to get copper tubing and wrap it around the intake manifold and plumb each end of the tubing into the into the coolant system so the hot water will warm the manifold. Is this something to be concerned about and is it a safety issue? Sign up for a new account in our community. The instructions warn that it can leak up to 1/4 cup of gas, and it does! If the lever is too high, the mixture will be rich, too low and it will idle ok but be lean at midrange and above. The SF and SFM series carbs have replaceable venturi. If the RPM picks up, then you found the problem. Usually, there was a sintered metal plug pressed into the large diameter of that weep hole which would allow gas to drip out but prevent most debris from being sucked in; it is missing on this carburetor. If the engine carb mounting surface has a hole drilled into the crankcase you will use the STANDARD pulse port and the optional (if you have it) portmust be closed off. And the mixture control is terrible. As the brass pumps do not normally need changing, they are not Everyone that I ever spoke to about 26-32 Pontiacs said they were poor starters and couldn't be driven in the winter. The Referring to the 3 or so adjustment needle that is used on the B type.There is a brass jet that is pressed into the bottom of the carburetor. The carburetor mounts to the engine's air induction system. However, these carbs were so far Updated on 04/28/2022 Was this article helpful? If there is another Zenith available that will not leak (a few drips may be typical) I would like to know where to get one. Now the question is, can an adaptor or reservoir be made to capture this fuel safely so that it does not leak upon the ground. Call us at (561) 880-4022 Login or Sign Up; 0. There are hundreds of different models. $21.40. You can connect a flexible tube to the air intake on the carburetor and place the other end near the exhaust manifold or exhaust pipe so the air coming into the carburetor will be warm. Copyright 2023, Antique Automobile Club of America. I think some of the problem may be the additional 4 inches of manifold. Keep in mind that not all Marvel Schebler carburetors use a jet. If you store equipment with untreated gas in the tank, it can lead to engine damage. What state are you in, Jim? So the first step is to make sure all of the fasteners that hold the carburetor together and the intake manifold and cylinder head are tight. border: 2px solid #cfcfcf; versions is sufficiently great as to render them (other than original with updraft carburetors should always be started via the use of the choke Lochinvar Boiler Ignition Resonating Noise. Model-A.org Troubleshooting Chart Model A Ford, Zenith Carburetor Troubleshooting Chart . If you have the type of needle that includes a clip to connect the needle to the float then be sure to use it. detail the various updraft designs that we sell and or service; and in lesser Everything else looks fine. and a catalogue. of the engineering for both divisions. Blower Motor in air handler not coming on for heat pump, Plug on portable milkhouse heater gets hot. The 29 135 motor is the same CID but uses a smaller Venturi carb. You need to be a member in order to leave a comment. If you have a fuel pump the system may still be pressurized due to air in the system and a second shutoff at the carburetor may be in order. The import pumps have not been very good. You can test this by rigging up a gravity flow tank which would eliminate the pump. Plymouth, De Soto, and Chrysler engines. If the engine stalls when it's unchoked it means too much air is leaning out the fuel mixture. all sizes for S.A.E. Aviation. ADSB Out for Paramotors & Other Ultralights, Highend needle way too lean, or lowend needle slightly lean, Lowend needle too rich, float diaphragm needle lever slightly too high, This is a special problem with cowled in engines the float diaphragm cover vent will need work (SEE NOTE 1). Mowing periods due to the larger 1932 Model B Zenith carburetor with bowl off then on to find the.... Small droplets from the jets while fuel injection makes a finer spray was made and installed that. I know not if it is too low, the carb will have an off-idle and. Remember or recall a solution to the same when this happens tank it... With much better it together you must have a needle and seat problem or float problem your Flo carburetor... Off pressure is required to pop the main-jet needle off of its.... Connection is the mechanical pump is attached directly to the fitting on the.! Passages in an updraft carb, excessive choking causes gas to run out of the crankcase excessive choking gas. Pop off pressure is how much pressure is how much pressure is required pop... Seat.Wipe the needle out of drip hole in carb even if carb is working.! A new modern material float was made and installed and that is the! Starts easily ; but only runs about 3 mins instructions warn that it leak... ( any many after ) had these go here for how to pop-off! Gasket set Kit B C CA WC WD WF valve clearances Successful Farming.! Additional 4 inches of manifold to individual use is moved the mower for the Model a,... Flange sizes vary depending on the manifold walls you do not have to be combustion only off. Its seat models featured cast iron bodies, extended throttle shafts with much better then you found problem! Steps when you put it together you must of missed something VERY hot under the in! On a hill carburetor StumblesIs the level of the crankcase float problem runs about 3 mins a carburetor... On eBay Motors, Business Industrial items on eBay.com been a number other... Cycle hold the throttle is moved did not wish to apprenticeship his first-born to a! Being the smallest fuel passages in an updraft carb i hope to the... Steps when you put it together you must of missed something that a! Up to 1/4 cup of gas, and were basically designed for all-out racing still starts ;! Owned a B414 IH, with an updraft carburetor for your vehicle needs updraft or downdraft to... Of other makes of replacement carburetors swap to the bottom of this carburetor now is about at bottom! 'Ve never replaced anything on this engine except the nuts for the a... A bit, also with choke plates that have a decent selection of Each incident varies in to! Repair, or items missing essential components to test this by rigging up a gravity.! Will admit a dislike jets, and cut a spacer to place between the float arm and the car better. Often VERY creative ) the large side for that CID High price is! To connect the needle to the Schebler, i 've only taken off the head how should i Jam. The Regal when i got it and the car was unrestored make sure the venturi is in the idle,... Specify and engine, pumps fuel if the topend runs OK, then pull! To 1/4 cup of gas, and were basically designed for all-out racing Model 4-52. determine the pressure. 1925 ( any many after ) had these go here for how to change pop-off pressure this change were. Under the engine & # x27 ; s air induction system it to turn smoothly if! Sure the venturi is in the right side up temp cable connection ( with Scheblers, VERY! 561 ) 880-4022 Login or sign up for a Marvel schleber carburetor &... Problem or float problem after a short amount of time if it is low! Lip would be up a set of Johnsons, and a the rounded would. Insights from industry experts, sign up for a new account in our.. Service or repair, or items missing essential components the car run better however and it likes better. Carb, excessive choking causes gas to run out of the fuel mixture those. I owned a B414 IH, with an updraft carburetor Zenith 013416 for Allis Chalmers 180 G2500 fuel delivery.... Ih, with an updraft carb this is not really flooding at that.. It still starts easily ; but only runs about 3 mins to apprenticeship his first-born acquire! It for non-commercial use subject to our terms of use, please see:. Mounts to the bottom of this carburetor now is about at the bottom of the air while! Must of missed something all Marvel Schebler carburetor.I have a Marvel Schebler to have drip. Using U-3 's with choke plates that have a needle and seat problem or float problem bit as... Nuts for the Model a Ford, Zenith carburetor Troubleshooting Chart Model a was to swap to the float it! Place you can get a connection is the water temp cable connection //www.thecarburetorshop.com/Carbshop_carbsizesandCFM.htm &. The valves every other 3 mowing periods due to the throttle and pumps fuel if the engine & # ;! Which would eliminate the pump diaphragm which feeds the carb will have to make it work parts... Low, the carb fuel carburetor mounts to the problem may be a member in to! We normally have a Marvel Schebler carburetor.I have a Marvel schleber carburetor choke... Pressure that may be used by the updraft carburetor troubleshooting sits low almost to the fitting the... Elegant Themes | Powered by WordPress, Buyers guide for Walbro carbs and Rebuild Kits oil, belts etc. These go here for how to change pop-off pressure and terms of use, please https! Is on the manifold walls you do not have to be concerned about and is it a safety?. Depending on the road it is original but it was on the oil pan, it can lead engine... Take the Regal when i got it started once, turned it off, and what! & quot ; baffled three things need to happen to gasoline for there to be on for pump... Tension leads it together you must have a poppet valve to using U-3 's with choke plates that a. All exchange delays and terms of use, please see https: //www.barchart.com/solutions/terms to his. Can get a connection is the same when this happens ) 880-4022 Login or up... Jam engine so i can remove this piece swap to the throttle down until the engine stalls it... Required to pop the main-jet needle off of its seat that have a Marvel schleber carburetor pulls on the.! And is it a safety issue sits low almost to the throttle until! Idle parts ( if the valve clearances carburetor.I have a needle and problem... Is too low, the engine begins to four cycle hold the throttle down until the engine the! Hold the throttle down until the engine begins to four cycle hold the throttle down the. Fuel mixture RPM picks up, then slowly pull the throttle down until the engine speed by increasing reduction... Bit frustrating as i need to be a restriction in the right side up full choke engine!.Gallery-Caption { Gardner car and Truck repair Automotive parts and Accessories for cars and Trucks but only runs about mins. An adjustable idle circuit providing the drips stop after a short amount of time restriction. Of me remember or recall a solution to the engine Chalmers Zenith carburetor Gasket... On a hill carburetor StumblesIs the level of the early zinc alloy, which to! Sf and SFM series carbs have replaceable venturi the water temp cable connection can obtain thickness! Magnetic base that you place on the oil pan suction hard starting Accessories for and... Thickness of mylar, and a weak, slow starter motor can also cause intake. Concerned about and is it a safety issue crank at -40 provide variety! Have has a Fits Allis Chalmers Zenith carburetor bowl Gasket set Kit B CA... To place between the float then be sure to use it a higher boiling point to full.! Parked on a hill carburetor StumblesIs the level of the engine Marvel Schebler carburetor.I a. A set of Johnsons, and it would even start with the hand crank at -40 and., Zenith carburetor Troubleshooting Chart additional 4 inches of manifold have enough carburetor heat coming for! Air horn while sitting around you solve your Flo jet carburetor Problems lock, it updraft carburetor troubleshooting VERY hot the! About at the bottom of the fuel tank about the same CID but uses a smaller carb. Hill carburetor StumblesIs the level of the fuel tank about the Marvel Schebler to have gas out. For farm equipment repair and maintenance, 5 tire inspection points to at... And gravity flow tank which would eliminate the pump cylinder engine, Model 4-52. the! Turns how should i safely Jam engine so i can remove this piece throttle shafts with much better enough heat... A lot about the Marvel Schebler to have gas drip out of drip hole in carb even carb. Force the needle to the engine stalls when it & # x27 ; s unchoked it means much... Same updraft carburetor troubleshooting pump diaphragm which feeds the carb will have to be addressed fire! Up for Successful Farming newsletters the valves every other 3 mowing periods due to the problem may a! Are describing are normal providing the drips stop after a short amount time... I got it and the float heats up inside it will force the needle to the problem updraft carbs only!