The Wacker Neuson 108121 Jet is a genuine OEM component designed for CT36-5A walk-behind concrete power trowels and PT2A self-priming centrifugal trash pumps. Sourced directly from Wacker Neuson, this OEM jet ensures the correct fuel-to-air metering your engine depends on for consistent starts and smooth operation across both machine families. Verified fitment spans multiple CT36-5A trowel configurations — including the adjustable-handle variant — as well as PT2A pump assemblies. Keep part number 108121 on hand as a routine service item whenever carburetor maintenance is performed.
Key Features
- OEM-Matched Fuel Metering Orifice — Manufactured to the exact bore diameter specified by Wacker Neuson, ensuring the carburetor delivers the correct fuel flow rate under all throttle conditions.
- Drop-In Carburetor Fit — Threads directly into the carburetor body of compatible engines with no modification, restoring the fuel circuit to its original configuration.
- Broad Fitment Across Two Machine Families — Compatible with CT36-5A concrete power trowels (including adjustable-handle builds) and PT2A trash pumps, making it a practical stocking part for mixed fleets.
- Protects Engine Performance — A worn or blocked jet causes lean running, hard starting, or erratic idle; replacing with the correct OEM 108121 restores proper combustion and throttle response.
- Fuel System Integrity — Using the correct OEM jet prevents unmetered fuel delivery that can lead to fouled plugs, carbon buildup, or engine damage over time.
A carburetor jet is a precisely sized orifice that controls the volume of fuel drawn into the engine's air stream at specific throttle ranges. The size of the opening is calibrated to the engine's displacement and intended operating conditions — even a small variation in bore diameter will throw off the fuel mixture, causing symptoms like rough idling, poor throttle response, or difficulty starting. Over time, jets can become partially blocked by fuel varnish or debris, or physically damaged during carburetor cleaning. Replacing a faulty jet with the correct OEM part restores the engine's designed fuel curve and keeps the trowel or pump running at full operating efficiency.
Part Details
| Part Number | 108121 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Jet |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| CT36-5A Trowel | CT36-5A | 5000009438, 5200016256 |
| CT36-5A | CT36-5A EU | 5000620829 |
| PT2A Pump | PT2A | 5000009092, 5000009095, 5000009237 |
| CT36-5A-C Trowel | CT36-5A-C | 5000620040 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
