The Honda 99101-124-0500 Main Jet (#50) is a genuine OEM carburetor component designed for a range of Honda generators, tillers, engines, lawn mowers, and water pumps, including the EM500, EM600, F200, G100, HR17, and WA15. As an authentic Honda part, this jet is sized and calibrated to Honda's original specification for the #50 orifice diameter, ensuring the carburetor meters fuel exactly as intended. This part is listed across multiple models and equipment classes, so buyers should confirm the #50 size matches the jet currently fitted to their specific unit before ordering. Sourcing directly from Honda's OEM supply chain means part number 99101-124-0500 carries the same dimensions and flow characteristics as the jet installed at the factory.
Key Features
- Correct Fuel Metering — the #50 orifice size is a precise designation; this genuine OEM jet delivers the exact fuel flow rate Honda engineered for the carburetor circuits it serves, keeping air-fuel mixture within the intended range
- Genuine OEM Part — sourced directly from Honda, this jet matches the original in material, thread form, and orifice diameter — no guesswork on sizing or thread pitch
- Broad Model Coverage — listed for Honda EM500 and EM600 generators, the F200 tiller, G100 horizontal shaft engines, HR17 lawn mowers, and WA15 water pumps; always verify the jet number stamped on your existing jet matches #50
- Restore Carburetor Performance — a blocked, eroded, or incorrectly sized main jet causes rich or lean running, hard starting, and power loss; replacing it with the correctly sized OEM jet restores clean throttle response and steady operation
The main jet is the fixed orifice inside the carburetor that controls how much fuel enters the engine under mid-to-full throttle conditions. Its size — indicated here by the #50 designation — determines the fuel flow rate, and even a small deviation from the correct size will shift the air-fuel mixture outside the ideal range, causing symptoms such as black exhaust smoke, hesitation, or inability to reach full power. A jet that has been partially blocked by varnish deposits from stale fuel, or one that has been damaged or replaced with the wrong size, will prevent the carburetor from functioning correctly; installing part number 99101-124-0500 restores the original metering and brings the carburetor back to proper operation.
Part Details
| Part Number | 99101-124-0500 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Main Jet (#50) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EM500, EM600 | All |
| Horizontal Shaft Engine | G100 | All |
| Lawn Mower | HR17 | All |
| Tiller | F200 | All |
| Water Pump | WA15 | All |
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.
