Carburetor Pump Discharge Vial

Product Description:

Calibration Vial
Porsche® tool number P25a
Sold per each.

This small glass vial comes from Porsche and has ml markings to measure the fuel pump dischage volume on the throttle circuit of your carburetor. The vial must be held down the throat of the carburetor and is best hung on a secured wire. Bench setting the fuel pump discharge volume will greatly assist tuning when the carbs get on the engine.

PLEASE NOTE:  Some disassembly and/or bench measurement will likely be required for Zenith 40TIN carbs, as well as the 911T '69-'71 Webers with 27mm chokes. For these carburetors, there is insufficient room in the throat to lower the vial into position.

Manufacturer Information:

Genuine Porsche
These parts come directly from Porsche. We carry a wide range of Genuine Porsche products in stock, and we also add parts to our website upon request if available. We can get many non-stocked Genuine parts within 2-4 business days. Parts from Germany may take 2-3 weeks or more. If time is a significant issue, please contact us before ordering.

Reviews and Ratings:

• 1950 Porsche 356
• 1951 Porsche 356
• 1952 Porsche 356
• 1953 Porsche 356
• 1954 Porsche 356
• 1955 Porsche 356
• 1955 Porsche 356A
• 1956 Porsche 356A
• 1957 Porsche 356A
• 1958 Porsche 356A
• 1960 Porsche 356B
• 1961 Porsche 356B
• 1962 Porsche 356B
• 1963 Porsche 356B
• 1963 Porsche 356C
• 1964 Porsche 356C
• 1964 Porsche 356SC
• 1965 Porsche 356SC
• 1965 Porsche 911
• 1967 Porsche 911
• 1968 Porsche 911
• 1969 Porsche 911
• 1970 Porsche 911
• 1972 Porsche 911
• 1973 Porsche 911
• 1974 Porsche 911
• 1975 Porsche 911
• 1976 Porsche 911
• 1977 Porsche 911
• 1985 Porsche 911 Carrera
• 1986 Porsche 911 Carrera
• 1987 Porsche 911 Carrera
• 1988 Porsche 911 Carrera
• 1989 Porsche 911 Carrera
• 1978 Porsche 911SC
• 1979 Porsche 911SC
• 1980 Porsche 911SC
• 1981 Porsche 911SC
• 1982 Porsche 911SC
• 1983 Porsche 911SC
• 1965 Porsche 912
• 1966 Porsche 912
• 1967 Porsche 912
• 1968 Porsche 912
• 1969 Porsche 912
• 1976 Porsche 912E
• 1970 Porsche  914
• 1971 Porsche  914
• 1972 Porsche  914
• 1973 Porsche  914
• 1974 Porsche  914
• 1975 Porsche  914
• 1976 Porsche  914
• 1970 Porsche 914/6
• 1971 Porsche 914/6
• 1972 Porsche 914/6
• 1973 Porsche 914/6
• 1974 Porsche 914/6
• 1975 Porsche 914/6
• 1976 Porsche 914/6

All returns require pre-approval. All returns are subject to a 25% restocking fee, with the exception of approved warranty returns, or if we ship a different part number than ordered. We do not accept returns after 30 days.

Inspect your order immediately when it arrives. We must be notified within 5 days if there are any missing, damaged, or incorrect parts.

Returns (except warranty) won't be accepted if the part:
 - Has been installed, used, damaged, is dirty or incomplete
 - Is not sellable as new
 - Arrived in sealed packaging that has been opened
 - Is an electrical part, a custom or cut-to-length item, or a Special Order
 - Was purchased more than 30 days earlier

Parts must be returned properly padded in a sturdy cardboard box. Returns sent in envelopes will be refused. Items damaged in transit to us cannot be refunded. All returns must be shipped prepaid.