The Genie 106490GT is a genuine OEM Spark Plug for the Ford LRG425 engine, built for a range of Genie telescopic boom lifts, scissor lifts, and articulating boom lifts. As a direct OEM replacement, this spark plug meets the original engine manufacturer's specification — no substitution guesswork, no compatibility risk. It fits machines including the S-80, S-85, S-40, S-45, GS-3390, GS-4390, GS-5390, GS-3384, Z-60/34, and Z-80/60. Cross-reference part number 106490GT against your machine's parts manual to confirm it is the correct plug for your unit before ordering.
Key Features
- Genuine OEM Ignition Spec — Manufactured to the original Ford LRG425 engine specification, so electrode gap, heat range, and thread pitch are exactly as the engine requires.
- Direct Engine Fit — Threads directly into the Ford LRG425 cylinder head with no modification, seating and torquing the same as the original.
- Broad Genie Fitment — Covers Genie S-series telescopic booms, GS-series scissor lifts, and Z-series articulating booms powered by the Ford LRG425 engine.
- Clean, Consistent Ignition — A fresh, correctly specified plug fires reliably at the right point in the combustion cycle, supporting smooth starts and steady engine performance under load.
- Engine Longevity — A worn or fouled plug misfires, accelerates carbon buildup, and can cause hard starting or rough running. Replacing it at the correct service interval protects the engine and keeps the machine ready for work.
A spark plug ignites the air-fuel mixture inside the engine's combustion chamber, producing the power stroke that keeps the engine running. On Ford LRG425-powered Genie equipment, each plug fires thousands of times per minute, and over time the electrode wears, the gap widens, and ignition becomes inconsistent. A degraded plug can cause hard starting, rough idling, misfires under load, and increased fuel consumption. Replacing the plug with the correct OEM part — matched to the engine's heat range and electrode specification — restores clean combustion and protects the engine from the knock and deposit buildup that a poorly firing cylinder can cause.
Part Details
| Part Number | 106490GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Spark Plug, Ford LRG425 |
Compatibility & Fitment
| Name | Model |
|---|---|
| S-80 | S-80 |
| S-85 | S-85 |
| S-40 | S-40 |
| S-45 | S-45 |
| GS-3390 | GS-3390 |
| GS-4390 | GS-4390 |
| GS-5390 | GS-5390 |
| GS-3384 | GS-3384 |
| Z-60/34 | Z-60/34 |
| Z-80/60 | Z-80/60 |
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.
