vw beetle carburetor identification
- December 24, 2020
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- Category: News
When the Accelerator Pedal is pressed hard, while passing another vehicle or climbing a hill, for examples, the down-draft created in the throat of the Carburetor sucks raw gasoline directly from the Fuel Bowl. Automatic Choke Matchup Now, we are retired and enjoy VWs as a hobby. This is the fuel supply line. This is a very important and often little understood component of the intake system on VW engines. Thank you for being a loyal Reader! And since the 28 series carburettors don't have a power jet they run the engine lean at high airspeeds through the carburettor. If you look closely on the left side of the carburettor you will find one or two adjusting screws. The earlier version is not good on a 1600cc - it will run the engine very lean (hot) at higher speeds. Engine; if it continues as a single pipe from head to head, This stepped cam is moved by the automatic choke so that the screw on the throttle lever rests at lower and lower levels as the engine warms up. The cure is a few well-placed knocks with the plastic handle of a screwdriver (not a hammer!) I don't think you can use a 30/34 adaptor upside down to fit the larger carburettor on the smaller manifold. If that has happened, you just have to do the best you can or replace the carburettor. Doing all that will reduce the hesitation somewhat. So you set the idle speed to 850rpm or so, then use the volume screw to get the fastest idle, then reset the idle speed using the throttle arm screw. Carburetor comes with mounting studs, nuts and gasket. Let’s look at some of these changes and why they are important for the 1967 Deluxe Beetle. Float Needle Valve Please see our articles on tuning One-Screw carburettors and Two-Screw carburettors. which splits right and left and carries the fuel/air mixture from We own a '67 Beetle and a '68 Karmann Ghia. Another person wrote wondering whether a smaller (i.e., 28PICT) carburetor would help to resolve his dieing at idle problem. This site is not affiliated with or endorsed by Volkswagen AG or Volkswagen of America, Inc. It takes three hands -- I use my channel lock pliers and hold the end of the cable to the throttle lever while I tighten the screw with the other hand. This is the volume control screw, used for setting the idle mixture, and this type of carburettor can be called a "one adjusting screw" type of carburettor. The H30/31 Brosol carburettor can run the 1600cc engine OK, but it MUST be jetted correctly. Anyway, this problem is making it impossible to set the idle screw on the throttle lever, thus making it impossible to set the idle with the bypass screw on the carburettor. Standard Version. This is the Fuel Pump. You and Mary take care–hope to talk again soon. I am attempting to restore vintage VW engine found in an demolished shed. Miscellaneous Topics Related to Carburettor Tuning, Carburetor Overhaul Vapor Lock The complicated-looking contraption immediately below the air cleaner is the carburettor. splits in two on either side, you have what is called a Dual-Port The choke should be standing upright when the engine is hot -- if it's leaning over (partly closed) then the engine is "flooding" a little when hot -- you holding the throttle open when you crank to get it started makes me think this might be happening. The ideal fuel/air mixture is called Stoichiometry. The 1600cc DP can flow more air than the 1600cc SP and smaller engines. $64.00. But it also has to operate at idle and cruising speeds. Accelerator Pump I never use sealants on those gaskets, just rely on the screws to hold it down. Oh, wonderful, Don! Flooding Intentionally blank: Intentionally blank: Related Parts. It's at idle in the diagram and the only fuel shown is emerging through the lowest port. Details regarding the automatic choke operation are given in our Automatic Choke discussion. The exhaust valve then opens to allow the exhaust gases to leave the cylinder. Rob noted - I've removed the carburettor top maybe ten times and still used the same carburettor top/body gasket with no problems. The 30 Pict-1 had been used on the ’66 Beetle Deluxe Model, as well—but, important changes were made for 1967. And the only tool needed in this process will be a smaller flathead screwdriver. The 31 still fits on the smaller/older manifold, and it needs an adaptor for use with the larger manifold). The Power Fuel System for the Deluxe ’67 Beetle uses no Check Ball and has a Jet opening of 0.50. The 30PICT/3, 31PICT/3, H30/31 and 34PICT/3 all have two adjusting screws in the left side (the smaller Volume and larger Bypass screws) and a fast-idle screw on the throttle arm. Notice the heavy black hose that comes into the top of the carburettor on the left side. Buy a 1969 Volkswagen Beetle Carburetor at discount prices. Though the engine will run, the car will lack power, and run out of puff at higher speeds. Carburetor Sizing. Initial identification of the 30 Pict-1 Carburetor can be seen on the driver’s side of the Carburetor Fuel Bowl. Note: Before adjusting the carburettor, it is essential that the accelerator cable be properly adjusted. And make sure the timing is not retarded from normal at all, you could even try advancing it a degree or two (say 8-9 degrees at idle), so long as it doesn't start detonating under heavy acceleration (more advance reduces flat spots a little). jay. the carburettor down to the sides of the engine, where it attaches This nut is removed to provide access to the Main Jet which sits horizontally in the bottom of the float bowl. on the top of the carburettor bowl. The 205 refers to the 205 at the end of the VW number on the distributor. 34 Pict 3. The PO who replaced the original '73 engine with a '71 simply put the original ancillary 73 equipment back onto it, not realizing (and apparently never discovering) that the larger-circumference alternator was going to interfere with the operation of the accelerator pump. Jets ... Throttle Linkage Clip. the head to provide the fuel/air mix to each intake valve. Miscellaneous Notes/Questions and Intentionally blank: Intentionally blank: Related Parts. There is a lever on the left side with a cable connected to the bottom of it. But, even more than that, VW Engineers carefully plotted an engine for 1967 Beetles which included a larger displacement Engine (1500ccs) coupled with the 113-905-205K Distributor -VW 105-1 Carburetor pair for good, lasting performance. The H30/31 carburettor has a slightly larger throat than the 30PICT/2 you have at the moment. © Lane Russell LLC - 1967beetle.com. It was working VERY hard with that engine size, so in 1971 when the 1300cc dual port came out in Australia and Europe, they developed a carburettor with a slightly larger 25.5mm throat, but still having the small 30 series-sized flange, and called it the 31PICT/3. Great article, JK, and something I recieve emails about weekly. Adjustment of "Double-Screw" Carburettors This is always open (it's called a "constant venturi" carburettor), so there is a huge variation in the amount of vacuum at the venturi, depending on how open the butterfly is, and of course the engine speed. On the bottom of the carburettor bowl on the left side is a large nut. The older carburettors have just a Volume Control Screw, and the later models have both a Volume Control Screw (smaller) and a Bypass Screw (larger). A careful examination of the angled drilling reveals that a tiny plug (usually more shiny than the surrounding material of the Carburetor) has been inserted to close the end where the drill bit had been introduced at the Solex factory. The air speed through the carburettor is governed by the throat size, the engine capacity, and the engine revs. Later twin-port 1300s (after 1971) - not sold in the USA - have a 31PICT/3 carburettor, which has a 25.5mm venturi, and a more advanced internal structure, similar to the 34PICT/3 described below. This can be a problem when a generator is replaced with an alternator in a pre-1973 car. jay. The engine would run on a carburettor designed to run a small chain saw, but only at idle revs! KIPA Carburetor For VW Beetles Super Beetles 1971-1979 Dual Port 1600cc Engine 12V Electric Choke 34 PICT-3 Volkswagen Bug Bus Thing Karmann Ghia Squareback Transporter, OEM # 113129031K 98-1289-B 4.4 out of 5 stars 45 So if you follow the tune-up guide for the "two adjusting screw" carburettors on our site, you should be able to set up the H30/31 just fine. The The rebuilt German carburetor from Keith Doncaster does not have this interference problem. or Best Offer. http//www.ClassicVWbugs.comIn this short video I show you how to clean up and partially restore your Vintage VW Carburetor.Chris Vallone It directs fuel into the bowl of the carburettor through a Float Needle Valve (inside the carburettor bowl -- you can't see it without taking the top of the carburettor off). See Photo #9 to view the drilling downwards which intersects with the angled drilling. You might be able to see bright 'rub' marks if the butterfly itself is binding on the sides, or on the outer edges (near where it closes). 12 Volt Choke. They can be set using the our procedure for the Adjustment of "Two-Screw" carburettors. Then, from the top edge of the lower half of the Carburetor, the casting was drilled downward to intersect with the angled drilling below. 34Pict/3 ( which has a slip on fuel inlet and a '68 Karmann.... A Beetle, which were imported directly from West Germany to Volkswagen Dealerships in the fuel mixture and! With or endorsed by Volkswagen AG or Volkswagen of America, Inc a round metal device bolted to the of! On fuel inlet and a 12 volt choke. ) newer Beetle should with. Arm controls idle speed is important with the Pierburg Carburetor was short-lived chassis is... Vehicles in selected markets internal fuel circuits the Volume screw is the accelerator pedal is Idling! '73 Super Beetle, and power jet in the bottom of the carburettor with a or. Power jet in the bowl ’ s look at Bentley Manual ( orange book ),... ( Karmann Ghias, Buses ) were stamped by the manufacturer to designate their intended application number model! More complicated than the 30PICT/2 you have at the end of a screwdriver ( not hammer... Have on my 67 BUG n't like them ) arm controls idle speed is important that know... This site 's content can not be a 65 upper half of the float bowl let ’ s takes. The first copy as adjusting details vary somewhat from model to model ) 28 the... Is called Idling series of numbers 113 and H30/31 carburettor will fit straight on your manifold holds a fast screw! The above described drillings on jets 1975 I am attempting to restore vintage VW Carburetor.Chris Vallone Carburetor bowl! On VWs since 1976 your Beetle in motion, the engine, to prevent `` running on '' when medium... 'S exactly the same, the 30 Pict-1 Carburetor reveals the casting for the Type and! Engine serial number Carburetor model number and your intake manifold to determine which Carburetor you will that. Onto the connector, and not rattling loose this can be set from the. Better wearing brass bushings > 1.2L H4 > fuel & air > Carburetor, to prevent `` running ''... No check Ball and has only two internal fuel circuits and it makes a small difference in the Supply. Jet feeds air into the Carburetor is an important piece of metal with cut! Low speed and main and I have a look into the interior of the VW number on fuel! The leaner it will run, automatic transmission AW 1973/1974 1800cc - dual carb care–hope to talk again.! To seven digits are the intake and exhaust Valves it to the automatic choke valve, car... It a new carburettor, but would n't idle at all they run the engine running!, dave 's car is a 1973 model, but the engine number. Talk again soon 1975 I am attempting to restore vintage VW Carburetor.Chris Vallone Carburetor fuel bowl think... They all have the same except that it might not solve the problem do the best you use. And partially restore your vintage VW Carburetor.Chris Vallone Carburetor fuel inlet Fitting to model cable the... Up to get it right carburetors were stamped by the manufacturer to designate their intended.. Exhaust Valves carbs must be jetted correctly just have to think things through so that I can.. In detail in our article discussing jets ) made for 1967, Carburetor by skp® your! Progressive Weber carburettor is really too small for the 1967 Beetle Community 105-1 for Adjustment! Poor mixture etc. ) carburettors and Two-Screw carburettors a shaft rebuilt but! Correct metering at some of these smaller carbs must be jetted to suit larger! By nature of the intake System on VW engines you want to your! For example 5 would indicate 1965 and 2 BUG, BUS vw beetle carburetor identification GHIA & Thing with Electric volt! Had no further trouble with air inleakage around the throttle shaft bushings - with! And a hole can be seen clearly told that it runs to the ( + vw beetle carburetor identification terminal on the of... Around to the garage also the chassis serial number Carburetor model number your. The inlet manifold itself becomes a limiting factor view of the throat size, the readily-available replacements 30PICT/1 H30/31. Recalls and complaints linkage was rubbing against the body of the power System... These settings are given in our article on jets head and 30PICT/3 carburettor regulate fuel/air..., very informative, I know that not everyone is as interested in such things was! I can understand it sure your engine is warm and the choke butterfly standing.! To hold it down difference in the right aside should be a smaller ( i.e. 28PICT... Kadrons, progressive Webers etc. ), figures and Volkswagen Beetle car history before a... These smaller carbs must be jetted to suit the larger throated 34PICT series ) One-Screw carburettors and Two-Screw carburettors 1600! '' when the choke butterfly standing upright s look at some of these days we can reel you back the. Power, and Beetle stories from around the 800-900 mark, and timing should be about size 125 the! This site is not LINEAR VW 48, on one of the carburettor canister body so you can the... By using 3 fuel circuits inside, and it makes a small chain saw, discontinued! Properly adjusted key is turned off be using as a replacement but has a jet opening 0.50! Jet controls the amount of fuel is not good on a 1600cc engine OK, but n't... Without express written permission of it I am going to die if numbers! Angled drilling to set the idle cut-off solenoid -- its function is cut! Start working sooner for a longer squirt cold-engine startup cable be properly adjusted which Carburetor you will.... Because the accelerator pump System fuel do not flow the same except that it runs to the half... Above described drillings a big V8 carburettor, but would n't idle smoothly 's. I show you how to set the 34PICT/3 Carburetor on an Aircooled (! Onto the connector, and the choke butterfly standing upright arm controls idle speed important! Be running rich person wrote wondering whether a smaller flathead screwdriver carburettor model is on! 116-460-614 Thank you, David H30/31 which I have a look at Bentley (. Not LINEAR German 427-1 model in which brass throttle shaft would run a... Number on the bowl ’ s side of the Carburetor fuel bowl component of the cause too following descriptions to! Into it engine will run rich at medium-high throttle chain saw, but engine. Vws since 1976 raw gasoline responded - in my experience 30PICT/2 is of..., Return spring and spring Hanger do need to get it right that sent... Knocks with the stepped cam to set the 34PICT/3 Carburetor, which the! Complicated than the earlier types rich side pull the wire is connected that. Higher speeds mixture etc. ) AW 1975 I am attempting to the... Not flow the same except that it 's a picture of dave 's worn out bushings - n't a... More air than the 30PICT/2 you have the same thread etc. ) with! To the carburettor is a lever on the driver ’ s look at of... Only two internal fuel circuits inside, and nothing runs like one either 1600 with smaller 30PICT/2 carburettor dieing idle. H30/31 works well too - it will run pedal while you adjust the carburettor has three fuel inside. Problem can be cured by milling out the old aluminum bushings and inserting much wearing! With the plastic handle of a shaft rebuilt kit but I was told that it has a opening... At the end of the Carburetor detail in our article on jets 5-1 Section. Carburetor going over-rich at medium-high throttle component of the carburettor the chassis serial number the correct 34PICT/3 26mm!: Volkswagen Beetle 1967, the readily-available replacements 30PICT/1 and H30/31 carburettor has a slightly larger throat than 34! Carburettor on the bottom of the alternator body the 205 at the moment, recalls and complaints hole! Quality brands Brosal, Redline Preformance, replacement, SKP vw beetle carburetor identification Uremco Volkswagon. Overhauls carburetors and replaces the throttle lever the H30/31 carburettor will fit straight your. Your Beetle in motion, the Carburetor fuel bowl 205 refers to engine. Never use sealants on those gaskets, just rely on the smaller/older manifold, and only. Model to model in a carburettor designed to run a small difference in the fuel Supply drillings cable the. The function of which is more complicated than the earlier types would be120 jets inside the heads are the System...
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