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Description
59227000 Yamaha Reed Valve Kit — Gravely OEM Replacement Part
The 59227000 Yamaha Reed Valve Kit is a genuine Gravely OEM replacement service kit designed to restore proper reed valve function in Yamaha engines used on select Gravely zero-turn mowers. Reed valves are critical in two-stroke or specific engine induction systems, controlling the flow of the fuel/air mixture into the combustion chamber. This kit includes the correct OEM-matched reed valve assembly, gaskets, and O-rings to ensure a proper seal and reliable engine performance.
Product Details
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Item Number: 59227000
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Brand: Gravely / Ariens Co. OEM
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Part Type: Reed Valve Kit (Engine Component)
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Includes: Reed valve assembly, gaskets, and O-rings
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OEM Engine Reference: Yamaha Part 90891-80006
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Condition: New Genuine OEM Replacement Kit
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Intended Use: Replace worn or damaged reed valve components in compatible Yamaha engines used on Gravely equipment
Function
This reed valve kit is engineered to:
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Regulate fuel/air mixture flow into the engine crankcase/intake system
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Ensure proper reed valve sealing to maintain engine performance
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Replace cracked, bent, or fatigued reeds and seals that can reduce power or cause hard starting
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Support smooth engine operation and efficiency
Proper reed valve function is critical for consistent engine performance, especially in small engines designed for high-load mower applications.
Verify Fitment Before Ordering
Before ordering, confirm the following:
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Reed valve kit is for Yamaha-equipped Gravely mowers
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Your engine’s model and serial number match the configuration that uses this reed valve assembly
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Cross-reference with Yamaha Part 90891-80006 as needed
⚠️ Always verify compatibility with your engine model and diagram to ensure accurate fitment.
Compatibility
Fits select Gravely zero-turn mowers equipped with Yamaha engines that utilize this specific reed valve assembly, including models in:
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Gravely zero-turn series with Yamaha power plants
⚠️ Specific model applicability can vary — use your mower’s model/serial number and OEM parts lookup to confirm the exact match.
Installation / Usage
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Park the mower on a level surface and disconnect the spark plug
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Remove the engine cover and access the reed valve housing
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Detach old reed valve assembly, gaskets, and O-rings
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Install new reed valve components from the 59227000 kit
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Reassemble reed housing and engine covers
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Test engine startup and idle function for proper performance
Maintenance Tips
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Inspect reed valves during routine engine service
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Replace seals and gaskets if any signs of cracking or leakage appear
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Keep intake components clean of debris
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Ensure proper torque on all mounting hardware
Notes / Equivalent References
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Genuine Gravely 59227000 aligns with Yamaha OEM part 90891-80006 for proper fit and performance.
