16100-Z9L-811 16100-Z9M-811 Carburetor - Fits Honda GCV170 GCV170LA HRN216 GCV200LA 7

16100-Z9L-811 / 16100-Z9M-811 Carburetor Tune-Up Kit

Key Features

• Optimized 4-Cycle Fuel Mapping: Factory-calibrated specifically for Honda's Next-Generation GCV170 and GCV200 engines to provide a stable idle and smooth power delivery across the entire RPM range.
• Advanced Auto-Choke Compatibility: Engineered to integrate seamlessly with Honda’s thermal wax auto-choke system, ensuring reliable, no-hassle starting in both cold and hot conditions.
• Ethanol-Shield Internals: Features upgraded gaskets and internal needle valves designed to resist the corrosive effects of ethanol-blended fuels, preventing common "gumming" issues.
• High-Velocity Intake Design: The internal venturi is precision-machined to maximize airflow, helping your mower maintain consistent blade speed even when cutting through thick, wet grass.
• Complete System Refresh: This comprehensive kit includes a pre-adjusted carburetor and a high-density pleated air filter to restore peak fuel efficiency and engine protection in one step.

Replaces / Cross-Reference Part Numbers

• 16100-Z9L-811
• 16100-Z9M-811
• BB76J-A
• BB76G-A
• 16100-Z9L-801
• 16100Z9L811
• 17211-Z8M-003 (Air Filter)

Compatibility & Fitment

This carburetor is a direct replacement for Honda's latest overhead valve (OHV) residential engine platforms. Key compatible models include:

• Honda HRN Series Mowers: HRN216 (all versions including VKA, VLA, VYA).
• Honda HRX Series Mowers: HRX217K6 and newer versions utilizing the GCV200 engine.
• Honda GCV Engines: GCV170, GCV170LA, GCV200, GCV200LA.
• Specific Engine Types: G5B, G5BR, S3B, and Type 7 configurations.

When to Replace

• Hard Starting or No Start: The mower won't fire even with fresh gas, indicating the internal jets or the auto-choke passage is severely restricted.
• Engine "Hunting" or Surging: The engine RPM fluctuates up and down at a steady pace, usually caused by a lean fuel condition or an internal air leak within the carburetor.
• Fuel Leaking from Intake: Gas is dripping from the air filter housing, which indicates a stuck float or a failed needle valve—a serious fire hazard.
• Mower Dies Under Load: The engine starts and idles but stalls as soon as you engage the blade or enter thick grass, signifying a clogged high-speed circuit.
• Visible Varnish/Corrosion: If the carburetor bowl contains white powdery residue or "jelly-like" old fuel, a full replacement is more reliable than cleaning.

Installation Tips

• Note the Gasket Stack: Pay close attention to the order of the insulator, gaskets, and air cleaner case. If the gaskets are installed in the wrong order or backward, the engine will suffer from vacuum leaks.
• Clean the Fuel Tank: Before installing the new 16100-Z9L-811, drain the old fuel and wipe out any debris in the tank. Installing a new carb with old, dirty gas will ruin it instantly.
• Check the Thermowax: While the carburetor is off, inspect the auto-choke thermowax plunger. Ensure it moves freely so it can properly actuate the choke on your new carburetor.
• Avoid Over-Tightening: Tighten the mounting bolts evenly by hand. Over-torquing can warp the plastic air cleaner housing or the carburetor flange, leading to air leaks.
• Filter Saturation: When installing the new air filter, ensure the seal is seated flat in the housing. A poorly seated filter allows dust to bypass the carburetor and score the engine cylinder.