The Honda 99101-124-0450 Main Jet (#45) is a genuine OEM component designed for EM500 and EM600 generators, the F200 tiller, and G100 horizontal shaft engines. As a numbered jet, the #45 designation identifies a specific orifice size — confirm this matches your carburetor's original specification before ordering. Honda OEM parts are produced to the same standards as the original build, ensuring the metering orifice is sized exactly as Honda intended for correct fuel delivery.
Key Features
- Correct Fuel Metering — the #45 orifice size is a precise specification; this genuine OEM jet maintains the air-fuel ratio Honda calibrated for these carburetors, keeping combustion clean and consistent
- Genuine OEM Part — sourced directly from Honda, this jet is manufactured to the same tolerances as the original, so no recalibration or retuning is needed after installation
- Broad Fitment — listed for EM500 and EM600 generators, the F200 tiller, and G100 horizontal shaft engines; verify the #45 size is correct for your specific unit before installing
- Serial Number Verification Recommended — Honda supersedes carburetor components at production breaks, so cross-check your machine's serial number against the fitment table to confirm part number 99101-124-0450 is the right jet for your build
The main jet is a small, precisely drilled orifice inside the carburetor that meters the volume of fuel drawn into the engine under normal running conditions. Its calibrated size directly controls the air-fuel mixture at mid to full throttle — too large a jet richens the mixture, causing fouled plugs and poor efficiency; too small leans it out, risking overheating and power loss. A damaged, corroded, or incorrectly sized main jet results in rough running, poor fuel economy, and difficulty holding a steady load, making it one of the most important small components in any carburetor service.
Part Details
| Part Number | 99101-124-0450 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Main Jet (#45) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EM500, EM600 | All |
| Horizontal Shaft Engine | G100 | All |
| Tiller | F200 | 1281470-9999999 |
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.
