Easy
15-30 minutes
This replacement spark plug is a genuine OEM sourced component which is supplied for use with Honda engines commonly installed on lawn and garden equipment. A spark plug delivers electric current from an ignition system to an internal combustion engine. Over time spark plugs tend to become dirty or fouled eventually requiring replacement. Please note this high-quality item is sold individually.
Spark Plug - Cmr5h - Ngk 31915-Z0H-003
OEM part for: Honda
Part Number: 31915-Z0H-003
$6.18
In Stock
Ships within 1 business day 
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Compatibility
This part will fit the following 67 machines
Honda
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GX25N (Type S3)(VIN# GCADK-1000001-9999999) Small Engine View Diagrams & Manuals
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GX25N (Type SGT3)(VIN# GCADK-1000001-9999999) Small Engine View Diagrams & Manuals
GX25N (Type ST3)(VIN# GCADK-1000001-9999999) Small Engine View Diagrams & Manuals
GX25N (Type T3)(VIN# GCADK-1000001-9999999) Small Engine View Diagrams & Manuals
GX25N (Type TZ3)(VIN# GCAVK-1000001-9999999) Small Engine View Diagrams & Manuals
GX25N (Type TZR3)(VIN# GCAVK-1000001-9999999) Small Engine View Diagrams & Manuals
GX25N (Type W3)(VIN# GCADK-1000001-9999999) Small Engine View Diagrams & Manuals
GX25NT (Type S3)(VIN# GCART-1000001) Small Engine View Diagrams & Manuals
GX25NT (Type SAM3)(VIN# GCART-1000001) Small Engine View Diagrams & Manuals
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GX25NT (Type SGT3)(VIN# GCART-1000001) Small Engine View Diagrams & Manuals
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GX25NT (Type W3)(VIN# GCART-1000001) Small Engine View Diagrams & Manuals
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HHT25S (Type LTA/A)(VIN# HAFA-1000001 to HAFA-9999999) Trimmer/Brush Cutter View Diagrams & Manuals
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GX25NT (Type HAT)(VIN# GCART-1000001-9999999) Engine View Diagrams & Manuals
GX25NT (Type S2)(VIN# GCART-1000001-9999999) Engine View Diagrams & Manuals
GX35NT (Type T4)(VIN# GCAST-1000001-9999999) Engine View Diagrams & Manuals
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Show More Compatible Models
This item works with the following types of products:
- Engine Parts
- Trimmer Parts
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
general tune for the season
Robert - June 15, 2023
Tool Type
Engine
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Socket set, Nutdriver, Adjustable Wrench
Removed old parts and install new. Very easy and replacement parts fit perfect.
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Carb on small tiller was clogged and had been setting up for three years
Dennis - March 17, 2023
Tool Type
Engine
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Socket set
Removed old parts, cleaned carb and installed new parts.
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Wouldn't start
Jeffrey - August 30, 2022
Tool Type
Engine
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set
Replaced carburetor
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Air intake cover plastic broke on Honda roto-tiller
Charles - September 27, 2021
Tool Type
Engine
Difficulty
Easy
Time
15-30 minutes
Tools Used
Wrench Set
Removed old cover and enclosed filter and replaced with new. Then did annual maintenance including changing spark plug and gas filter on tiller.
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Gas tank ,filter fuel lines and carburetor needed replaced because gas was left in for to long
Daniel - June 7, 2021
Tool Type
Engine
Difficulty
Easy
Time
15-30 minutes
Tools Used
Pliers, Socket set, None
1. Replaced fuel tank, filter and fuel lines .
2 . Replaced carburetor
3. Replaced breather tube
4 . Relaced spark plug
2 . Replaced carburetor
3. Replaced breather tube
4 . Relaced spark plug
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Honda FG110 tiller very hard to start and once started would stall out when throttle applied.
Art - June 6, 2021
Tool Type
Engine
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Socket set
1. Replaced the carburetor…quick and easy
2. Replaced the fuel filter. Snagged the fuel line out of the tank with a clothes hanger. Be sure not to pull too hard so you don’t disconnect the fuel line inside the fuel tank
3. Replaced the air filter after installing new carburetor..
4. Replaced spark plug. Had to remove one screw holding the plastic cover onto the the engine to get to the plug. Removed plug and installed new one.
After the repairs the tiller was as good as new.
2. Replaced the fuel filter. Snagged the fuel line out of the tank with a clothes hanger. Be sure not to pull too hard so you don’t disconnect the fuel line inside the fuel tank
3. Replaced the air filter after installing new carburetor..
4. Replaced spark plug. Had to remove one screw holding the plastic cover onto the the engine to get to the plug. Removed plug and installed new one.
After the repairs the tiller was as good as new.
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Grass trimmer clutch assembly broken
Marc - December 6, 2019
Tool Type
Engine
Difficulty
Medium
Time
30-60 minutes
Tools Used
Socket set
I removed motor assembly and took off clutch assembly and replaced it with new clutch assembly and replaced spark plug and air cleaner ,reassembled all parts and put grass trimmer back in service
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Honda trimmer would not run. Replaced spark plug, fuel filter, Fuel and return tube.
Joseph - May 26, 2019
Tool Type
Engine
Difficulty
Easy
Time
30-60 minutes
Tools Used
Socket set, Wrench Set
1. Removed old fuel tubes
2. Removed gas tank to access fuel filter and run new tubes into tank.
3. Replaced spark plug.
Note: removing the grommet in the gas tank makes it easy to run the new tubes and attach the new fuel filter. Cutting a diagonal cut in the ends of the fuel tubes makes it easier to insert into the grommet.
2. Removed gas tank to access fuel filter and run new tubes into tank.
3. Replaced spark plug.
Note: removing the grommet in the gas tank makes it easy to run the new tubes and attach the new fuel filter. Cutting a diagonal cut in the ends of the fuel tubes makes it easier to insert into the grommet.
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engine would not start.
Fred - May 1, 2018
Tool Type
Engine
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Socket set
Engine was not winterized, and there was old stale fuel present.
Drained old fuel, installed new fuel filter.
Installed new spark plug, along with new air filter and missing air fiter cover.
Followed proper starting procedure ,and started like a champ.
Drained old fuel, installed new fuel filter.
Installed new spark plug, along with new air filter and missing air fiter cover.
Followed proper starting procedure ,and started like a champ.
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Just needed service
Frank - November 18, 2017
Tool Type
Engine
Difficulty
Easy
Time
15-30 minutes
Tools Used
Wrench Set
Took off the housing and r&r'd the plug. Another housing to change the air filter. Pulled the fuel intake line out of the tank with the aid of a small hooked tool and r&r'd the fuel filter. All very easy .
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Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
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