{"product_id":"genuine-weber-brass-float-48-ida-40-46-ida-3c-carburetor-41015-007","title":"Genuine Weber Brass Float | 48 IDA \u0026 40\/46 IDA 3C Carburetors | Porsche 911, 914-6 \u0026 VW Type 1–4 (41015.007)","description":"\u003cp\u003eThe \u003cstrong\u003egenuine Weber brass float, part 41015.007\u003c\/strong\u003e — item 15 in the Weber IDA exploded view — is the fuel-level float for downdraft Weber IDA carburetors. This is the original soldered-brass design, not a reproduction and not an aftermarket copy: factory Weber stock sourced through \u003cstrong\u003eREDLINE\u003c\/strong\u003e, the authorized North American Weber distributor, and shipped from their California warehouse. Rebuilding a Weber 48 IDA on an air-cooled VW, or a pair of 40\/46 IDA 3C triples on an early Porsche 911? This is the correct float.\u003c\/p\u003e\n\n\u003cp\u003eBrass floats have quietly become the hard part of an IDA rebuild. Most of what is offered today is either the later plastic (Spansil) float that replaced brass in Spanish production, or an aftermarket brass copy made outside the Weber supply chain. The genuine brass floats that do surface are typically overseas listings with two-week transit and international shipping charges that exceed the part. \u003cstrong\u003eThis one ships from the United States.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eHow many floats do I need?\u003c\/h3\u003e\n\u003cp\u003eThis is the most common ordering mistake on IDA carburetors. The 2-barrel and 3-barrel bodies use the \u003cem\u003esame\u003c\/em\u003e float — but not the same quantity.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eCarburetor\u003c\/th\u003e\n\u003cth\u003eFloats required\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeber 48 IDA (2-barrel)\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e1\u003c\/strong\u003e per carburetor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeber 40 IDA 3C \/ 46 IDA 3C (3-barrel)\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e2\u003c\/strong\u003e per carburetor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePorsche 911 — matched pair of 3-barrel carbs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e4\u003c\/strong\u003e total\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVW Type 1 — dual 48 IDA setup\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e2\u003c\/strong\u003e total\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eSold individually, or as a 2-pack and a 4-pack so you can order a complete carburetor or a complete car in one go.\u003c\/p\u003e\n\n\u003ch3\u003eFitment — this part fits the carburetor, not the car\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eConfirmed carburetor fitment:\u003c\/strong\u003e Weber 48 IDA (2-barrel) and Weber 40 IDA 3C \/ 46 IDA 3C (3-barrel). Weber's own parts breakdowns also list this float across the wider 3-barrel family — \u003cstrong\u003eIDA, IDAP, IDL, IDTP, IDS, IDT and IF\u003c\/strong\u003e series.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVehicles commonly running these carburetors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePorsche 911\u003c\/strong\u003e — factory Weber 40 IDA 3C induction, roughly February 1966 through 1972, before mechanical fuel injection took over.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePorsche 914\/6\u003c\/strong\u003e and other 3-barrel IDA-series applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir-cooled VW\u003c\/strong\u003e — Beetle, Super Beetle, Karmann Ghia, Bus, Type 3, Type 4, Thing and buggy builds running dual 48 IDA.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePorsche 356 and 912\u003c\/strong\u003e performance builds converted to 48 IDA.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall-block Ford and other V8 induction\u003c\/strong\u003e — 4x 48 IDA setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMazda rotary\u003c\/strong\u003e — 12A and 13B engines running 48 IDA downdrafts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eVerify before ordering:\u003c\/strong\u003e confirm the model stamped on your carburetor body and count your float chambers. If your set currently runs plastic floats, see the note on mixing materials below.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Weber\u003c\/strong\u003e — factory part 41015.007, supplied through REDLINE, the authorized North American Weber distributor. Not an aftermarket copy and not an Italian reproduction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoldered brass construction\u003c\/strong\u003e — the original specification, and the correct material for a period-correct restoration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne float, two carburetor families\u003c\/strong\u003e — the same part serves the 2-barrel 48 IDA and the 3-barrel 40\/46 IDA 3C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIn stock in California\u003c\/strong\u003e — no international transit, no import fees, no multi-week wait.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrect weight for the IDA needle valve\u003c\/strong\u003e — a matched float and needle valve are what hold a stable fuel level; a mismatched float is the usual cause of flooding or high-rpm starvation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWeber part number: \u003cstrong\u003e41015.007\u003c\/strong\u003e (supplied as 41015.007B, brass)\u003c\/li\u003e\n\u003cli\u003eAlso catalogued as: \u003cstrong\u003ePMO PM-O165-0\u003c\/strong\u003e — the same float under a different supplier's number\u003c\/li\u003e\n\u003cli\u003eExploded-view reference: item \u003cstrong\u003e15\u003c\/strong\u003e, Weber IDA parts breakdown\u003c\/li\u003e\n\u003cli\u003eMaterial: \u003cstrong\u003eBrass\u003c\/strong\u003e, soldered disc body with a saddle channel and integral pivot tang\u003c\/li\u003e\n\u003cli\u003eBrand: Weber, via REDLINE (authorized North American distributor)\u003c\/li\u003e\n\u003cli\u003eCondition: New\u003c\/li\u003e\n\u003cli\u003eSold as: single float, 2-pack, or 4-pack (select above)\u003c\/li\u003e\n\u003cli\u003eCompanion part — IDA needle valve: Weber 79504 series (48 IDA commonly 2.00 mm, part 79504.200)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFloat level reference\u003c\/h3\u003e\n\u003cp\u003ePublished Weber IDA float-leveling figures, measured with the top cover held vertical and the float resting lightly on the closed needle valve:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eCarburetor\u003c\/th\u003e\n\u003cth\u003eClosed (dimension A)\u003c\/th\u003e\n\u003cth\u003eFloat drop\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e40 \u0026amp; 46 IDA 3C (3-barrel)\u003c\/td\u003e\n\u003ctd\u003e18 mm\u003c\/td\u003e\n\u003ctd\u003e12.5–13 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e48 IDA (2-barrel)\u003c\/td\u003e\n\u003ctd\u003e24 mm\u003c\/td\u003e\n\u003ctd\u003e5.5–6 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eFloat level specifications vary by application — always confirm against the calibration for your specific carburetor before final assembly.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-barrel carburetors:\u003c\/strong\u003e to run this float in a 40 or 46 IDA 3C, \u003cstrong\u003ethe stop tab must be removed\u003c\/strong\u003e. In a 48 IDA it fits as supplied.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNever mix brass and plastic floats\u003c\/strong\u003e within one carburetor or one matched set. The two materials do not weigh the same, so the fuel levels will not match and the carburetors cannot be balanced.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjust at the tang, not the arm.\u003c\/strong\u003e Bend the tabs until they sit perpendicular to the pivot axis, and inspect the tang face for indentations that can bind the needle.\u003c\/li\u003e\n\u003cli\u003eReplace the needle valve and the top-cover gasket at the same time. A new float against a worn needle will not hold a level.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIs this a genuine Weber part?\u003c\/strong\u003e Yes. Weber part number 41015.007, supplied through REDLINE, the authorized North American Weber distributor. It is not an aftermarket copy and not one of the Italian artisan reproductions currently sold in its place.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIs this the same as PMO PM-O165-0?\u003c\/strong\u003e Yes — same float, different supplier's part number. PMO catalogues this Weber float under their own number. If you have been quoted PM-O165-0, this is that part.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrass or plastic?\u003c\/strong\u003e Brass — the original material. Weber later introduced a plastic (Spansil) float under the same base part number for Spanish production. Both work, but they do not weigh the same, so never mix them within one carburetor set.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhich is better, brass or plastic?\u003c\/strong\u003e Brass is correct for a period-correct restoration and is what the carburetor was designed around. Plastic floats cannot develop a pinhole leak and sink, which is the one failure mode brass has. Builders run both successfully — what matters is that every float in your set is the same material.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHow do I know my float has failed?\u003c\/strong\u003e A leaking brass float takes on fuel, sits low, and holds the needle valve open — you get flooding, fuel smell, a rich idle, and fuel weeping from the air horns. Shake it: if you hear liquid inside, it is done.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHow many do I need for my Porsche 911?\u003c\/strong\u003e Four. Each 40 or 46 IDA 3C carburetor has two float chambers, and a 911 runs a matched pair of carburetors. Order the 4-pack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHow many for a dual 48 IDA VW?\u003c\/strong\u003e Two — one per carburetor. Order the 2-pack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoes it fit the 40 IDA 3C as supplied?\u003c\/strong\u003e Not quite — the stop tab must be removed for 3-barrel use. It fits the 48 IDA as supplied.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWill this work in an EMPI EPC 48 or another IDA clone?\u003c\/strong\u003e The EPC 48 and similar IDA-style clones use their own float part numbers. Check your carburetor's parts breakdown before ordering; this listing is for genuine Weber IDA bodies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat float level should I set?\u003c\/strong\u003e 18 mm closed with a 12.5–13 mm drop on the 3-barrel 40\/46 IDA 3C; 24 mm closed with a 5.5–6 mm drop on the 2-barrel 48 IDA. Confirm against your carburetor's calibration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoes it come with a needle valve or gasket?\u003c\/strong\u003e No — float only. The IDA needle valve is Weber's 79504 series; the 48 IDA commonly uses the 2.00 mm valve, part 79504.200.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat other carburetors use this float?\u003c\/strong\u003e Weber's 3-barrel parts breakdowns list it across the IDA, IDAP, IDL, IDTP, IDS, IDT and IF families in addition to the 48 IDA.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhere does it ship from?\u003c\/strong\u003e The United States. Most competing genuine brass floats ship from Italy, the Netherlands or the Czech Republic with long transit and import charges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat is the part number I should search for?\u003c\/strong\u003e 41015.007 — also written 41015.007B for the brass version, 41015007, WEB-41015-007, and PMO PM-O165-0.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003e⚠️ California Proposition 65 Warning:\u003c\/strong\u003e This product can expose you to chemicals including lead, known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Is this a genuine Weber part?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Weber part number 41015.007, supplied through REDLINE, the authorized North American Weber distributor. It is not an aftermarket copy and not one of the Italian artisan reproductions currently sold in its place.\"}},{\"@type\":\"Question\",\"name\":\"Is this the same float as PMO PM-O165-0?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Same float, different supplier's part number. PMO catalogues this Weber float under their own number PM-O165-0. If you have been quoted or shipped PM-O165-0, this is that part.\"}},{\"@type\":\"Question\",\"name\":\"How many floats does my carburetor take?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A Weber 48 IDA (2-barrel) uses one float. A Weber 40 IDA 3C or 46 IDA 3C (3-barrel) uses two floats per carburetor. A Porsche 911 running a matched pair of 3-barrel carburetors needs four floats total. A dual 48 IDA VW needs two.\"}},{\"@type\":\"Question\",\"name\":\"Is this float brass or plastic?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Brass, the original material. Weber later introduced a plastic (Spansil) float under the same base part number for Spanish production. Both work, but they do not weigh the same, so never mix the two materials within one carburetor set.\"}},{\"@type\":\"Question\",\"name\":\"Which is better, a brass float or a plastic float?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Brass is correct for a period-correct restoration and is what the carburetor was designed around. Plastic cannot develop a pinhole leak and sink, which is the one failure mode brass has. Builders run both successfully. What matters is that every float in your set is the same material.\"}},{\"@type\":\"Question\",\"name\":\"How do I know my Weber float has failed?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A leaking brass float takes on fuel, sits low in the bowl, and holds the needle valve open. Symptoms are flooding, a strong fuel smell, a rich idle, and fuel weeping from the air horns. Shake the float: if you hear liquid inside, it is done.\"}},{\"@type\":\"Question\",\"name\":\"Does this float fit the 40 IDA 3C as supplied?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Not quite. To run this float in a 40 or 46 IDA 3C three-barrel carburetor, the stop tab must be removed. In a 48 IDA two-barrel it fits as supplied.\"}},{\"@type\":\"Question\",\"name\":\"What float level should I set on a Weber IDA?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Published Weber figures are 18 mm closed with a 12.5-13 mm float drop on the 3-barrel 40 and 46 IDA 3C, and 24 mm closed with a 5.5-6 mm drop on the 2-barrel 48 IDA. Float level specifications vary by application, so confirm against the calibration for your specific carburetor.\"}},{\"@type\":\"Question\",\"name\":\"Does it include a needle valve or gasket?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No, float only. The IDA needle valve is Weber's 79504 series; the 48 IDA commonly uses the 2.00 mm valve, part 79504.200. Replace the needle valve and top-cover gasket at the same time, because a new float against a worn needle will not hold a level.\"}},{\"@type\":\"Question\",\"name\":\"What other Weber carburetors use part 41015.007?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Weber's parts breakdowns list this float for the 48 IDA and across the 3-barrel family: IDA, IDAP, IDL, IDTP, IDS, IDT and IF series.\"}},{\"@type\":\"Question\",\"name\":\"Will it fit an EMPI EPC 48 or another IDA-style clone?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The EMPI EPC 48 and similar IDA-style clones use their own float part numbers. Check your carburetor's parts breakdown before ordering. This listing is for genuine Weber IDA bodies.\"}},{\"@type\":\"Question\",\"name\":\"Where does it ship from?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The United States. Most competing genuine brass IDA floats ship from Italy, the Netherlands or the Czech Republic, with long transit times and international shipping charges that can exceed the price of the part.\"}},{\"@type\":\"Question\",\"name\":\"What part numbers should I search for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"41015.007 is the Weber number. The brass version is also written 41015.007B. You may also see it as 41015007, WEB-41015-007, or PMO PM-O165-0. It is item 15 in the Weber IDA exploded view.\"}}]}\u003c\/script\u003e","brand":"Weber","offers":[{"title":"Single Float","offer_id":45463942627443,"sku":"41015.007B","price":49.95,"currency_code":"USD","in_stock":true},{"title":"Set of 2 — one 3-barrel carb","offer_id":45463942791283,"sku":"41015.007B-2","price":94.95,"currency_code":"USD","in_stock":true},{"title":"Set of 4 — Porsche 911 full set","offer_id":45463942824051,"sku":"41015.007B-4","price":179.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/2760\/1523\/files\/PM-O165-0-scaled_6aee5b73-e6e9-44f2-bcc4-2735f94978d0.jpg?v=1788918565","url":"https:\/\/www.washburnsmetal.com\/products\/genuine-weber-brass-float-48-ida-40-46-ida-3c-carburetor-41015-007","provider":"Washburn's Metal","version":"1.0","type":"link"}