GCV170 Carburetor for Honda 16100-Z9L-811 GCV 170 HRN216 Lawn Mower Carburetor for Honda GCV 170 GCV170LA G5B GCV170LA G5BR GCV170LA S3B Engine Parts

What It Is

This is a direct-replacement carburetor for Honda GCV170 engines, commonly found on HRN216 push mowers and other residential lawn equipment. It meters fuel and air into the engine for combustion; if your engine won’t start, idles rough, or stalls under load, the carb is often the culprit.

Fitment & Compatibility

Check your engine model, not just the mower brand. This carb fits Honda GCV170, GCV170LA G5B, GCV170LA G5BR, and GCV170LA S3B engines. The OEM part number is 16100-Z9L-811. It will not work on GCV160 or GCV190 engines—verify the engine’s stamped code (usually on a metal plate near the spark plug). This is an aftermarket carb, not Honda OEM, but it mirrors the stock dimensions and hose fittings. No special adapters needed; it bolts directly to the intake manifold with two screws.

Key Things to Know

• Installation difficulty: easy. Requires basic hand tools (socket set, screwdriver). Expect 20–30 minutes. No special tuning needed out of the box.
• Quality is good for the price. Users report it works as well as OEM, but some may need a minor idle adjustment screw tweak after install (turn 1.5 turns out from closed as a starting point).
• Common gotcha: Old gaskets should be replaced. This carb usually comes with new gaskets, but double-check they match your engine’s intake. A leak here causes poor running.
• Fuel system prep matters. If your old carb failed due to stale gas or debris, drain the tank and clean the fuel line before installing the new one to avoid repeat failure.

Should You Buy It

Yes, if your GCV170-powered mower stumbles or won’t start and you’ve ruled out spark and fuel flow issues. It’s a fraction of the OEM cost, fits perfectly, and most users get it running in under half an hour. Skip it if you prefer OEM parts for warranty or commercial use.