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Small Engine

Honda GX160

4-Stroke

The Honda GX160 is a 163cc 4-stroke overhead-valve engine and the most widely used model in the GX series globally, powering pressure washers, generators, water pumps, compaction equipment, and go-karts across residential and commercial applications. It uses a Keihin float-type carburetor and accepts NGK BPR6ES or Champion RC12YC spark plugs. The 4-stroke overhead-valve design delivers exceptional fuel economy and longevity. Routine maintenance every 100 hours includes oil change (SAE 10W-30), air filter cleaning or replacement, and spark plug inspection. The GX160 superseded the Honda GX140.

What this page covers

This page covers the Honda GX160 4-Stroke small engine.

Recorded annual maintenance parts: Spark Plug, Air Filter.

Reviewed spark-plug result: NGK BPR6ES or Champion RC12YC; 0.7mm plug gap.

Evidence: explicit provenance is recorded (Aftermarket-confirmed; reviewed 2026-05-20).

Check before searching Amazon

Verify engine code on equipment using GX160 power units.

Review annual maintenance parts
Verify before ordering: Fitment can vary by serial number, production date, region, and sub-model. Match the OEM number and physical dimensions before ordering.

Annual Maintenance Parts

These are individual maintenance components already present in this model record. No combined product claim is made.

Ignition

Spark Plug

OEM number
98079-56846
Specification / dimensions
0.7mm plug gap
Evidence status
Medium confidence · Aftermarket catalog · 2026-05-20
Variant / exclusion warning
Verify engine code on equipment using GX160 power units.

Air intake

Air Filter

OEM number
17210-ZE1-505
Specification / dimensions
Not recorded
Evidence status
Medium confidence · Aftermarket catalog · 2026-05-20
Variant / exclusion warning
Verify air-box style and whether a foam pre-filter is also needed.

Honda GX160 quick specs

Equipment
Small Engine · 4-Stroke
Covered Parts
Spark Plug, Air Filter, Carburetor, Recoil Starter, Ignition Coil
OEM References
98079-56846, 17210-ZE1-505, 16100-ZH8-W51, 28400-ZE1-013ZA, 30500-ZH8-W31
Model Family
GX120, GX140, GX160, GX200
Last Reviewed
2026-05-20
Data Confidence
Aftermarket-confirmed
Sources Consulted
  • Honda GX160 parts references
  • Aftermarket catalog cross-references
  • Retailer fitment listings
ℹ See also: GX120, GX140, GX200 — verify each model and part independently; family membership does not establish fitment.

Quick Fitment

Part TypeOEM / SpecCommon OptionConfidence
Spark Plug98079-56846NGK BPR6ESMedium · 2026-05-20
Air Filter17210-ZE1-505Stens 102-413Medium · 2026-05-20
Carburetor16100-ZH8-W51Keihin BB62BMedium · 2026-05-20
Recoil Starter28400-ZE1-013ZAStens 150-107Medium · 2026-05-20
Ignition Coil30500-ZH8-W31Stens 610-542Medium · 2026-05-20

Maintenance Interval

Inspect filters and fuel lines each season, replace spark plugs during annual service, and service carb/fuel-system parts when starting or idle symptoms appear.

Before You Buy

  • Confirm the full model is Honda GX160, not just the family name.
  • Check serial number, production date, and regional variant before ordering.
  • Match the old OEM number stamped on the removed part when available.
  • Compare dimensions, plug gap, thread, fuel line diameter, or chain pitch/gauge where applicable.

Common Mistakes

  • Ordering from a family listing without checking the exact sub-model.
  • Buying a kit that includes the headline part but wrong gaskets, lines, or bulb size.
  • Choosing the wrong carburetor revision when multiple versions were used.
  • Installing the correct plug number with the wrong gap.

Symptoms Map

Won't start

Spark plug, fuel filter, primer bulb, carburetor

Bogs under throttle

Air filter, carburetor, spark plug gap

Replacement Options

Best OEM equivalent

Start with OEM references 98079-56846, 17210-ZE1-505, 16100-ZH8-W51, 28400-ZE1-013ZA and match the removed part before choosing a listing.

Named part options

Cross-check named parts such as NGK BPR6ES (spark plug), Stens 102-413 (air filter), Keihin BB62B (carburetor) against the OEM number, identity label, and dimensions.

FAQ

Does this fit GX120 or GX140? GX120, GX140, GX200 are listed in the same model family. That relationship does not establish interchangeable parts; verify each OEM number, serial range, and physical detail separately.

How do I avoid ordering the wrong carburetor for the GX160? Match the carburetor number stamped on the removed unit, then compare linkage, choke setup, primer routing, gasket stack, and fuel-inlet direction.

Related Repair Guides

Honda GX160 Annual Maintenance PartsA seasonal maintenance checklist for Honda GX160 engines with links to common spark plug, air filter, and carburetor lookup pages.Carburetor Replacement Fitment GuideA fitment-first carburetor replacement guide covering stamped carb numbers, linkage, choke setup, primer routing, gasket stack, and model-specific checks.

Spark Plug

OEM98079-56846Confidence: Medium · Source: Aftermarket catalog
Reviewed
2026-05-20
Dimensions
0.7mm plug gap
Variant notes
Verify engine code on equipment using GX160 power units.
BrandPart #Identity
NGKBPR6ESNot classified
Search Amazon for NGK BPR6ESAmazonAffiliate link

As an Amazon Associate, WhichPartFits may earn from qualifying purchases. Match the OEM number, dimensions, and model variant before buying.

ChampionRC12YCNot classified
Search Amazon for Champion RC12YCAmazonAffiliate link

As an Amazon Associate, WhichPartFits may earn from qualifying purchases. Match the OEM number, dimensions, and model variant before buying.

Air Filter

OEM17210-ZE1-505Confidence: Medium · Source: Aftermarket catalog
Reviewed
2026-05-20
Variant notes
Verify air-box style and whether a foam pre-filter is also needed.
BrandPart #Identity
Stens102-413Not classified
Search Amazon for Stens 102-413AmazonAffiliate link

As an Amazon Associate, WhichPartFits may earn from qualifying purchases. Match the OEM number, dimensions, and model variant before buying.

Carburetor

OEM16100-ZH8-W51Confidence: Medium · Source: Aftermarket catalog
Reviewed
2026-05-20
Variant notes
Match choke, throttle linkage, and fuel inlet orientation.
Exclusions
GX160-powered equipment may use application-specific linkage or air-box parts.
BrandPart #Identity
KeihinBB62BNot classified
Search Amazon for Keihin BB62BAmazonAffiliate link

As an Amazon Associate, WhichPartFits may earn from qualifying purchases. Match the OEM number, dimensions, and model variant before buying.

Recoil Starter

OEM28400-ZE1-013ZAConfidence: Medium · Source: Aftermarket catalog
Reviewed
2026-05-20
Variant notes
Verify starter cup and housing style.
BrandPart #Identity
Stens150-107Not classified
Search Amazon for Stens 150-107AmazonAffiliate link

As an Amazon Associate, WhichPartFits may earn from qualifying purchases. Match the OEM number, dimensions, and model variant before buying.

Ignition Coil

OEM30500-ZH8-W31Confidence: Medium · Source: Aftermarket catalog
Reviewed
2026-05-20
Variant notes
Verify coil mounting and flywheel compatibility on the exact engine code.
BrandPart #Identity
Stens610-542Not classified
Search Amazon for Stens 610-542AmazonAffiliate link

As an Amazon Associate, WhichPartFits may earn from qualifying purchases. Match the OEM number, dimensions, and model variant before buying.