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Product details
PM-O133-0 is PMO's six-piece base gasket set for 46mm PMO Induction carburetors, sealing the carburetor flanges to the intake manifolds on a carbureted air-cooled 911. PMO specifies its 46mm carburetor sets for 2.8 to 3.0 liter performance engines and for 3.2 to 3.4 liter street and performance engines. PMO puts one set in its 46mm rebuild kit (PM-O700-1) to cover both carburetors.
A leak at the base usually shows up as one cylinder running lean, an idle that will not hold a sync, or a mixture screw that barely changes anything. Fresh gaskets belong on any job that lifts the carburetors, whether that is a venturi change (PMO's 46mm venturis come in 36mm, 38mm, 40mm, and 42mm sets of six), a manifold swap, or a rebuild.
Technical Details
- Manufacturer: PMO Induction (EMPI)
- Manufacturer part number: PM-O133-0
- Carburetor size: 46mm
- Position: carburetor base to intake manifold
- Fuel compatibility: E85 compatible (per PMO)
- UPC: 707924552355
- Sold as: set of 6
Fitment & Compatibility
Made for 46mm PMO Induction carburetors, including PMO's 46mm manifold sets for ported 2.7 to 3.0 liter engines and 3.0 liter CIS-port engines. A 40mm body takes PM-O132-0 and a 50mm body takes PM-O134-0.
Common Questions
Is one set enough for both carburetors?
Yes. Six gaskets cover a pair, the same quantity PMO packs in its 46mm rebuild kit.
I am changing venturis. Do I need new base gaskets?
If the carburetors come off the manifolds to do it, yes. Reusing compressed base gaskets is a common cause of air leaks.
