PMO Carburetor Base Gasket Set — 46mm, 6-Piece | Air-Cooled Porsche 911 (PM-O133-0)

A weeping carburetor base is the cheapest fault on an air-cooled 911 to fix and the most maddening to live with — fuel smell in the engine bay, a lean cylinder you can't dial out, and an idle that never quite settles. The PMO 46mm Carburetor Base Gasket Set (PM-O133-0) gives you all six fresh gaskets in one box so you seal the whole engine at once instead of chasing one throttle bore at a time.

Features

• Six gaskets per set — one per throttle bore, enough to do both carburetors in a single sitting.
• Sized specifically for 46mm carburetor bases — not a universal gasket trimmed to fit.
• Manufactured in the USA by PMO.
• Correct thickness and bolt-hole spacing to seat flat on the manifold flange without crushing.

Fitment

Confirmed: 46mm PMO carburetor installations on air-cooled Porsche 911 and 930 engines. Also used under 46mm Weber-based setups running the same base pattern.

Does NOT fit: 40mm carburetors (use PM-O132-0) or 50mm carburetors (use PM-O134-0). Measure your carburetor base before ordering — this is the single most common mis-order on gasket sets.

Specifications

• Part number: PM-O133-0
• Size: 46mm
• Quantity: 6 pieces
• UPC: 707924552355
• Country of origin: United States
• Shipping weight: 0.02 lb
• Boxed dimensions: 6 x 4 x 1 in

Questions & Answers

• How many gaskets come in the set? Six — one per throttle bore, enough for both carburetors.
• Will this fit my 40mm PMO carbs? No. This is the 46mm set. Order PM-O132-0 for 40mm or PM-O134-0 for 50mm.
• What's the part number? PM-O133-0.
• 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.