The Wacker Neuson 5000213779 is a genuine OEM Diaphragm Set designed for the BTS 630, BTS 635, and BTS 635S series gasoline cut-off saws. Sourced directly from Wacker Neuson, this part meets the original engineering specifications for the carburetor diaphragm system on these machines. It fits all major variants of the BTS 630 and BTS 635 families, including the BTS 630S, BTS 635, and BTS 635S. When the diaphragm wears or cracks, the saw will often fail to start, run rough, or surge under load — restoring it with part number 5000213779 brings fuel delivery back to spec.
Key Features
- OEM Diaphragm Material Integrity — Manufactured to the original flex and fuel-resistance spec, ensuring the diaphragm pumps and seals correctly within the carburetor body.
- Drop-In Carburetor Replacement — Designed to seat directly into the existing carburetor housing with no trimming or adaptation; the set includes all diaphragm components needed for a complete service.
- Broad BTS Series Fitment — Compatible with BTS 630, BTS 630S, BTS 635, BTS 635S, and BTS 635s variants, covering the full range of Wacker Neuson gasoline cut-off saws in this family.
- Restored Fuel Metering Performance — A fresh diaphragm set eliminates the hard-starting, surging, and stalling caused by a cracked or stiffened diaphragm, returning the saw to consistent power output.
- Fuel System Safety — A failed carburetor diaphragm can allow uncontrolled fuel flow or cause the engine to flood; replacing it with a correctly rated OEM diaphragm maintains proper fuel containment during operation.
The diaphragm set is a core service component of the carburetor's fuel-pumping and metering circuit. In a small engine carburetor, flexible diaphragms do the work of drawing fuel from the tank and regulating how much enters the engine under varying throttle conditions. When a diaphragm stiffens, tears, or develops pinholes — common results of age, ethanol-blended fuel exposure, or extended storage — the carburetor loses the ability to deliver a consistent air-fuel mixture. The result is an engine that is hard to start, surges at idle, or dies under load. Replacing the diaphragm set restores proper fuel circuit function and is one of the most effective first steps in a carburetor rebuild or tune-up on the BTS cut-off saw.
Part Details
| Part Number | 5000213779 |
|---|---|
| Old Part Number | 0213779 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Diaphragm Set |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Cut-off saw BTS 635 | BTS 635 | 5000610190, 5000610191 |
| BTS630 SAW, 12", 20mm arbor | BTS 630 | 5000610187, 5000610186 |
| BTS 635S | BTS 635S | 5000610193, 5000610192, 5000610407 |
| Floor Saw BTS 630S | BTS 630S | 5000610406 |
| BTS635s | BTS635s | 5100005408 |
| BTS635S Cut-off Saw | BTS 635s | 5100005409, 5100005411 |
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.
