The Multiquip 421000 Electric Tachometer 0-3000 RPM is a genuine OEM instrument designed for SP series pavement saws and flat saws, including models SP303526, SP303530, SP605730, SP605736, SP4, SP6457. As a direct OEM replacement, part 421000 ensures your machine displays accurate engine speed readings without modification to existing wiring or mounting points. Sourced directly through authorized Multiquip distribution, this tachometer meets the exact specifications of the original instrument installed at the factory. DHS Equipment stocks this part to keep your SP series saw running with the instrumentation it was built around.
Key Features
- Accurate RPM Sensing Across the Full 0-3000 RPM Range — Calibrated to read engine speed precisely across the entire operating range of SP series pavement and flat saw engines, so operators can maintain correct blade speed for each cut.
- Genuine OEM Instrument Grade — Built to the same electrical signal tolerance and display specification as the original factory-fitted unit, not a generic gauge adapted to fit.
- Direct Swap for SP Series Saws — Engineered to connect to existing sensor and harness points on compatible SP models, including SP4, SP6457, SP303526, SP303530, SP605730, and SP605736, among others.
- Protects Engine and Blade Performance — A failed or inaccurate tachometer leaves operators unable to confirm proper engine RPM, risking over-revving, underperformance, or premature blade wear on concrete and pavement cuts.
- Broad SP Series Compatibility — Fits eleven SP pavement saw and flat saw model configurations, covering SP303516 through SP605736, making this a high-confidence replacement across the Street Pro saw lineup.
An electric tachometer measures engine rotational speed in revolutions per minute and displays that reading to the operator in real time. On pavement saws and flat saws, maintaining the correct engine RPM is critical — too low and the blade loses cutting efficiency, too high and you risk engine stress or premature wear on both the blade and drivetrain components. When a tachometer fails, operators lose direct visibility into engine speed, making it difficult to diagnose performance issues or confirm the engine is running within its designed operating range. Replacing a faulty unit with the correct OEM instrument restores that visibility immediately.
Part Details
| Part Number | 421000 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Electric Tachometer 0-3000 RPM |
Compatibility & Fitment
| Name | Model |
|---|---|
| MQ Pavement Saws | SP303526 |
| MQ Pavement Saws | SP303530 |
| MQ Pavement Saws | SP605730 |
| MQ Pavement Saws | SP605736 |
| MQ Pavement Saws | SP4 |
| MQ Pavement Saws | SP6457 |
| MQ Pavement Saws | SP303516 |
| MQ Pavement Saws | SP303520 |
| MQ Pavement Saws | SP605716 |
| MQ Pavement Saws | SP605720 |
| MQ Pavement Saws | SP605726 |
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.
