Hard
More than 2 hours
This is an authentic manufacturer-sourced part which is made for Honda engines commonly installed on lawn and garden equipment. It helps to distribute the pressure evenly and provide a tight seal for the valve stem. Over time seal may wear out or get damaged eventually requiring a replacement. Make sure to check the appropriate diagrams for your model to ensure the exact location and the correct application. Note, one durable seal is included. A wrench set will be needed to perform this repair.
Seal- Valve Stem 12209-ZM0-003
OEM part for: Honda
Part Number: 12209-ZM0-003
$8.97
In Stock
Ships within 1 business day 
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Compatibility
This Seal- Valve Stem will fit the following 386 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
This item works with the following types of products:
- Engine Parts
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Customer Repair Instructions ?
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Broken valve
Ron - June 4, 2020
Tool Type
Engine
Difficulty
Medium
Time
More than 2 hours
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set
Split engine removed old valve. replaced with new part, new seals, and timing belt. Put engine back together.
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Bent crankshaft due to hitting very hard object
Angel - October 23, 2020
👍 0 of 1 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Hard
Time
More than 2 hours
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set, 2 and 3 jaw pullers, low and high range torque wrenches
Parts Used
- Valve Rocker Arm - 14431-Z0J-000
- Valve Rocker Arm - 14441-Z0J-000
- O-ring - 6.8x1.9 - Arai - 91301-ZM0-V31
- Seal- Valve Stem - 12209-ZM0-003
- Spring- Valve - 14751-ZL8-000
- Valve, In. - 14711-ZL8-000
- Pulley Comp., Camshaft - 14320-Z8D-000
- Belt, Timing (84hu6 G-200) - 14400-Z8B-003
- Valve, Ex. (c8e) - 14721-ZL8-000
- Cover, Head - 12311-Z8B-000
1. Took off broken blades, blade holder and drive belt pulley. This required a two jaw puller due to bend in shaft.
2. Open up crankcase. Many steps involved. Followed youtube videos. Detailed videos exist.
3. Take out piston. Found lots of black soot on piston, crankcase and valve seats. Apparently due to mistiming from running engine with bent crankshaft since this is a pretty new engine always running smooth before accident.
4. Use carburetor cleaner and lots of work to clean piston and case. Put in new valves and use grinding compound to clean valve seats and "break in" valves.
5. Install new crankshaft (also from ereplacement) and all new parts related to timing. The old ones looked fine but did not want to have to open up again in case there was some damage not visible.
6. Assemble everything. Again lots of steps. Take pictures when disassembling, label parts and use youtube videos. A mechanic friend lent me a puller and a torque wrench.
7. New blade holder and blades.
8. Pull starter cord. Starts right off. Runs very smooth. Cuts very well. Success but it is a major project for amateurs. I am retired thus have the time and love this Honda lawnmower. Kind of expensive because of all the new parts but still cheaper than a new Honda and I have only had it a couple of years. Now it's practically new.
2. Open up crankcase. Many steps involved. Followed youtube videos. Detailed videos exist.
3. Take out piston. Found lots of black soot on piston, crankcase and valve seats. Apparently due to mistiming from running engine with bent crankshaft since this is a pretty new engine always running smooth before accident.
4. Use carburetor cleaner and lots of work to clean piston and case. Put in new valves and use grinding compound to clean valve seats and "break in" valves.
5. Install new crankshaft (also from ereplacement) and all new parts related to timing. The old ones looked fine but did not want to have to open up again in case there was some damage not visible.
6. Assemble everything. Again lots of steps. Take pictures when disassembling, label parts and use youtube videos. A mechanic friend lent me a puller and a torque wrench.
7. New blade holder and blades.
8. Pull starter cord. Starts right off. Runs very smooth. Cuts very well. Success but it is a major project for amateurs. I am retired thus have the time and love this Honda lawnmower. Kind of expensive because of all the new parts but still cheaper than a new Honda and I have only had it a couple of years. Now it's practically new.
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Thanks for voting and helping fellow customers!
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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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