GCV170 Carburetor for Honda GCV200 GCV170 GCV170LA G5B GCV170LA G5BR GCV200LA S3C GCV200LA S3L Engines HRX217K6 HRN216 21" Walk-Behind Mower

What It Is

This is an aftermarket carburetor designed to replace the original equipment on Honda GCV170, GCV200, and related small engines, commonly found on Honda HRX217K6 and HRN216 walk-behind mowers. It controls the fuel-air mixture for engine starting and running, and is a direct swap for failed or gummed-up OEM units.

Fitment & Compatibility

Before buying, confirm your engine model number (stamped on the engine shroud or valve cover). Fits Honda GCV170, GCV170LA G5B, GCV170LA G5BR, GCV200, GCV200LA S3C, and GCV200LA S3L engines. Works on Honda HRX217K6 and HRN216 mower decks (21-inch). This is an aftermarket part, not OEM Honda—check for gasket thickness and bowl screw alignment compared to your old carb. Measure the mounting bolt spacing (typically 60mm center-to-center) and intake port diameter (approx. 20mm) to be safe.

Key Things to Know

• Quality varies: This is a budget replacement; inspect for casting flash or debris in the fuel bowl before installing. Clean with compressed air if needed.
• Installation difficulty: Moderate. You’ll need a socket set, screwdrivers, and possibly a carburetor adjustment tool. Expect 30-60 minutes if you’ve done it before.
• Common gotcha: The included gaskets may be thin or poorly cut—use OEM gaskets if you have them. Also, the choke linkage may need bending to align correctly on GCV200 models.
• Tuning required: After install, you may need to adjust idle and mixture screws (if adjustable) for smooth running. Non-adjustable models may run slightly rich.

Should You Buy It

If your Honda mower won’t start or runs rough due to a clogged or failed carburetor, and you want a low-cost fix without going OEM, this is a reasonable choice. It’s best for DIYers comfortable with basic engine work and tuning. Avoid if you need exact OEM fitment or prefer a plug-and-play replacement.