NGK CR5HSB Spark Plug – Fits Honda Small Engines & Generators (Replaces 98056-55777)
NGK CR5HSB Spark Plug – Fits Honda Small Engines & Generators (Replaces 98056-55777) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
NGK CR5HSB Spark Plug – Fits Honda Small Engines & Generators (...
Product Details
This NGK CR5HSB Spark Plug is a direct-fit replacement for various 4-stroke Honda Small Engines (GX Series) and Honda Generators, typically ranging from 1.1 to 3.5 HP. It's designed for reliability and consistent performance in a wide range of power equipment, replacing the original Honda part 98056-55777.
It serves as a direct cross-reference for several part numbers, including Autolite 4194, Champion Z9Y, and Denso U16FSR-UB, ensuring broad compatibility.
- Easy direct thread installation.
- Engineered for 4-stroke engine applications.
- Features a resistor to suppress electronic interference.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| NGK | CR5HSB / 6535 |
| Autolite | 4194 |
| Brisk | NAR17 / NAR17C |
| Champion | P-Z9HC / Z9Y |
| Denso | 6050 / U16FSR-UB |
| Honda | 98056-55757 / 98056-55777 |
| Subaru | 065-01408-60 |
| Tacti | V91106050 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Honda Engines & Power Equipment: This plug fits a wide variety of small engines and portable equipment like generators, tillers, and pumps. Please check your specific model against the list.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Honda | GX22 | 1.1 | 4-Stroke | Various | 98056-55777 | |
| Honda | GX31 | 1.5 | 4-Stroke | Various | 98056-55777 | |
| Honda | GX50 | 2.1 | 4-Stroke | Various | 98056-55777 | |
| Honda | GX100 | 3.0 | 4-Stroke | Various | 98056-55777 | EU2000i Generator |
| Honda | GX100U | 3.0 | 4-Stroke | Various | 98056-55777 | |
| Honda | GXH50 | 2.5 | 4-Stroke | Various | 98056-55777 | |
| Honda | GXH50U | 2.5 | 4-Stroke | Various | 98056-55777 | |
| Honda | GXV50 | 2.0 | 4-Stroke | Various | 98056-55777 | |
| Honda | GXV50U | 2.0 | 4-Stroke | Various | 98056-55777 | |
| Honda | GXV57U | 2.0 | 4-Stroke | Various | 98056-55777 |
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Honda | EB2000i | 2.0 | 4-Stroke | Various | 98056-55777 | Generator |
| Honda | EU1000I, EU1000IA2 | 1.0 | 4-Stroke | Various | 98056-55777 | Generator |
| Honda | EUX1000 | 1.0 | 4-Stroke | Various | 98056-55777 | Generator |
| Honda | EX700C | 0.7 | 4-Stroke | Various | 98056-55777 | Generator |
| Honda | FG100 | 1.0 | 4-Stroke | Various | 98056-55777 | Tiller/Cultivator |
| Honda | HHE31CA | 1.5 | 4-Stroke | Various | 98056-55777 | Edger |
| Honda | HHT22S | 1.1 | 4-Stroke | Various | 98056-55777 | Trimmer |
| Honda | HHT31S, HHT31U | 1.5 | 4-Stroke | Various | 98056-55777 | Trimmer |
| Honda | UMK422, UMK422K1 | 2.0 | 4-Stroke | Various | 98056-55777 | Brushcutter |
| Honda | UMK431, UMK431K1 | 1.5 | 4-Stroke | Various | 98056-55777 | Brushcutter |
| Honda | WX10 | 1.0 | 4-Stroke | Various | 98056-55777 | Water Pump |
| Honda | WX15 | 2.5 | 4-Stroke | Various | 98056-55777 | Water Pump |
| Honda | BF2D (To 1026043) | 2.0 | 4-Stroke | Various | 98056-55777 | Outboard Motor |
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Generac | iX2000 | 2.0 | 4-Stroke | Various | Generator | |
| Hoffco | Pro Hoe - GX22 | 1.1 | 4-Stroke | Various | Tiller | |
| Maruyama | BCGX22 | 1.1 | 4-Stroke | Various | Brushcutter | |
| Maruyama | BCGX31 | 1.5 | 4-Stroke | Various | Brushcutter | |
| Solo | 501-4T | 4-Stroke | Various | Tiller/Cultivator | ||
| Solo | 502 | 4-Stroke | Various | Tiller/Cultivator | ||
| Subaru | Various | 065-01408-60 |
Technical Specs
- Product Type
- Spark Plug
- Installation
- Direct Thread
- Thread Diameter
- 10mm
- Thread Pitch
- 1.0mm
- Thread Reach
- 12.7mm (1/2")
- Hex Size
- 16mm (5/8")
- Seat Type
- Flat (Gasket)
- Terminal Type
- Solid
- Center Electrode Material
- Nickel
- Center Electrode Size
- 2.5mm
- Ground Electrode Material
- Nickel
- Ground Electrode Type
- Standard
- Ground Electrode Quantity
- 1
- Projection Type
- Non-Projected
- Gap
- 0.7mm (0.028")
- Heat Range
- 5
- Resistor
- Yes
- Resistor Value
- 5k Ohm
- Recommended Torque
- Cast Iron: 7.2-10.8 lb·ft, Aluminum: 7.2-8.7 lb·ft
- Product Dimensions
- 8.0" L x 2.0" W x 1.8" H
- Warranty
- 60 Days
- Expected Longevity
- 30,000 Miles
What’s in the Box
- 1 x NGK CR5HSB Spark Plug (NGK 6535)
Installation Notes
- Ensure the engine is cool and the ignition is off.
- Clean the area around the old spark plug to prevent debris from falling into the cylinder.
- Firmly pull the spark plug boot off the plug.
- Using a 16mm (5/8") spark plug socket, turn counter-clockwise to remove the old plug.
- Verify the gap on the new spark plug is 0.7mm (0.028") before installation.
- Thread the new plug in by hand to prevent cross-threading.
- Tighten with a torque wrench to the recommended value for your engine's head material (aluminum or cast iron). Do not overtighten.
- Securely re-attach the spark plug boot.
Troubleshooting & FAQ
How do I know if my spark plug needs replacing?
Common signs include difficulty starting, rough idling, engine misfires, reduced power, and poor fuel economy. A visual inspection may show a worn-out electrode, heavy carbon buildup, or oil fouling.
What is the correct spark plug gap for this plug?
The correct gap is 0.7mm (0.028"). While these plugs are typically pre-gapped, it is always best practice to verify with a feeler gauge before installation.
Can I use this plug in an engine not on the compatibility list?
We strongly advise against it. Only use this plug if your engine model and/or original part number are listed as compatible. Using the incorrect spark plug can lead to poor performance, overheating, or serious engine damage.
What does the 'R' in CR5HSB signify?
The 'R' indicates that this is a resistor-type spark plug. The internal resistor helps suppress ignition noise (Radio Frequency Interference) that can interfere with sensitive electronic equipment.
How often should I replace the spark plug in my small engine?
For small engines, replacement intervals depend more on hours of use and operating conditions than mileage. It's good practice to inspect the plug annually and replace it if you see signs of significant wear or fouling.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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