PMO Carburetor Syncrometer — Airflow Balancing Tool, Made in Germany | PMO & Weber Carbs (PM-O401-0)

You cannot tune six throttle bores by ear. The PMO Carburetor Syncrometer (PM-O401-0) is the German-made airflow gauge that turns carburetor balancing from guesswork into a measurement — seat it over one throat, read the flow, move to the next, and adjust until they match. It's the difference between an engine that idles and one that idles right.

Features

• Direct airflow measurement at each throttle bore, so you balance to a number instead of a feel.
• Made in Germany — the pattern shops have relied on for decades of air-cooled work.
• Works across multi-carburetor setups: PMO and Weber alike.
• Buy it once; it outlasts the engine you bought it for.

Fitment

Confirmed: Balancing PMO and Weber carburetors on air-cooled Porsche 911 and 930 engines.

Note: this is a shop tool, not a vehicle-specific part — it suits any multi-carburetor air-cooled setup where the gauge can seat over the throat. A second body style is available as PM-O402-0 (Bosch-knob pattern).

Specifications

• Part number: PM-O401-0
• Type: Carburetor airflow syncrometer (SK body)
• UPC: 707924555554
• Country of origin: Germany
• Shipping weight: 0.3 lb
• Boxed dimensions: 4.5 x 4.5 x 3.5 in

Questions & Answers

• What does a syncrometer do? It measures airflow through each carburetor throat so you can balance multiple carburetors to each other accurately.
• Will it work on Weber carbs? Yes — it suits both PMO and Weber multi-carburetor setups.
• How is this different from PM-O402-0? PM-O402-0 is the Bosch-knob style body; this is the standard SK pattern.
• What's the part number? PM-O401-0.
• Are you an authorized dealer? Yes — Washburn's Metal is an authorized PMO dealer.

⚠️ WARNING: This product can expose you to chemicals 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.