Fitment questions?
Call (855) 786-7101 or text (801) 304-3141.
Real people. Real answers.
Product details
PM-O126-0 is the inner accelerator pump diaphragm for PMO Induction carburetors, the flexible membrane that pushes a shot of fuel to the pump jets when the throttle opens. The PMO pump is a two-piece diaphragm design, and this inner diaphragm works with the outer accelerator pump assembly (PM-O129-0) and the accelerator pump cam (PM-O142-0). A torn, stiff, or swollen diaphragm delivers too little fuel, and the usual symptom is a stumble when the throttle is opened quickly.
When one carburetor's pump weeps fuel or gives a weak shot, the inner diaphragm is the first part to replace. Replace the outer assembly too if it is cracked or worn. For a full service, the PMO rebuild kit for your size (PM-O700-0, -1, or -2 for 40mm, 46mm, or 50mm) includes two inner diaphragms, two outer pump assemblies, two pump cams, and 12 pump jet washers.
Technical Details
- Manufacturer: PMO Induction (EMPI)
- Manufacturer part number: PM-O126-0
- Part type: accelerator pump diaphragm, inner
- Works with: outer accelerator pump assembly PM-O129-0
- Fuel compatibility: E85 compatible (per PMO)
- UPC: 707924553055
- Sold as: each
Fitment & Compatibility
Fits PMO Induction 40mm, 46mm, and 50mm carburetors. Weber IDA carburetors use a piston accelerator pump and take no diaphragm, so this part is for PMO carburetors.
Common Questions
Do I have to replace the outer pump assembly too?
Only if it is damaged or worn.
How many do I need for two carburetors?
Two, one per carburetor, which matches PMO's rebuild kits.
