PMO Carburetor Syncrometer — Bosch-Knob Style, Made in Germany | PMO & Weber Carbs (PM-O402-0)

The PMO Carburetor Syncrometer, Bosch-Knob Style (PM-O402-0) is the same job as the standard gauge in a different body — the knurled Bosch-pattern knob many tuners prefer for adjusting on the fly with one hand while the engine is running. German-made, and built to give you a repeatable airflow reading at every throttle bore.

Features

• Bosch-knob adjustment — easier to trim single-handed with the engine running.
• Measures airflow at each carburetor throat so multi-carb setups can be balanced to a number.
• Made in Germany.
• Suits PMO and Weber multi-carburetor installations.

Fitment

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

Note: a shop tool rather than a vehicle-specific part. If you prefer the standard body style, order PM-O401-0.

Specifications

• Part number: PM-O402-0
• Type: Carburetor airflow syncrometer (Bosch-knob / BK body)
• UPC: 707924555561
• Country of origin: Germany
• Shipping weight: 0.4 lb
• Boxed dimensions: 4.5 x 4.25 x 3.125 in

Questions & Answers

• What's the difference between this and PM-O401-0? This is the Bosch-knob body, easier to adjust one-handed; PM-O401-0 is the standard SK pattern. Both measure the same way.
• Will it work on Weber carbs? Yes — PMO and Weber multi-carburetor setups both.
• What's the part number? PM-O402-0.
• Are you an authorized dealer? Yes — Washburn's Metal is an authorized PMO dealer.
• How does it ship? Standard ground or air; no hazmat restrictions.

⚠️ 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.