Primer Bulb for Scooters & Mopeds

Replacement Primer Bulb for Scooters and Mopeds

This primer bulb is a hand-operated pump that belongs to the fuel system of small scooter and moped engines. Squeezing it a few times pulls fuel from the tank into the carburetor, which helps a cold engine fire up without delay. Like other scooter fuel system parts, it can wear out with age. A bulb that has cracked or gone stiff will no longer move fuel, and the engine becomes difficult to start.

What This Part Does

When you start the engine, the primer bulb is what gets fuel moving from the tank to the carburetor. If your scooter or moped is slow to start or appears to be running short of fuel, the bulb may need replacing.

Specifications

• Overall Outer Diameter: 18mm
• Overall Height: 14.5mm
• Fits: Universal primer bulb for scooters and mopeds (18mm outer diameter, 14.5mm overall height)

Fitment

How to choose: Check your existing primer bulb by measuring it. It should be roughly 18mm across the outside and 14.5mm in height.

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