A worn throttle shaft lets unmetered air leak past the bushings, which shows up as an idle you can never quite balance. This is a genuine PMO (Performance Machined Originals) throttle shaft for carburetors with 40mm throttle plates on the carbureted air-cooled Porsche 911. Part number PM-O138-1.

Features

• Genuine PMO / Performance Machined Originals manufacture
• Engineered for PMO and Weber carbureted air-cooled Porsche 911 induction
• Sized for 40mm throttle plates

Fitment

• Confirmed: Air-cooled Porsche 911 (1965–1989) running PMO or Weber carburetion with 40mm throttle plates.
• Not confirmed: Carburetors with other throttle plate sizes. If you are unsure of your carburetor size or setup, contact us with your engine build before ordering.

Specifications

• Part number: PM-O138-1
• Manufacturer: PMO (Performance Machined Originals)
• For: 40mm throttle plates
• Boxed dimensions: 4 x 4 x 1 in
• Shipping weight: 0.8 lb
• Origin: Imported

Frequently Asked Questions

Does this fit my Porsche? Fits air-cooled Porsche 911 (1965–1989) running PMO or Weber carburetion.

What is the part number? This is PMO PM-O138-1.

What throttle plate size is it for? 40mm throttle plates. Check your plate size before ordering.

Why replace a throttle shaft? A worn shaft lets air leak past the bushings and makes the idle hard to set and balance.

How does it ship? Standard ground from our Orange, California shop; no hazmat restrictions on this item.

⚠ California Proposition 65 Warning: This product can expose you to chemicals including lead, 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.