Description
Overview:
This exhaust valve guide is a precision‐machined metal sleeve that supports and aligns the exhaust valve stem inside the cylinder head of Honda small petrol engines. It provides a hard, accurately sized running surface and helps transfer heat away from the valve for stable operation and long service life. Designed for Honda GX‐series industrial engines used on site and garden machinery, it is suitable for engines such as the GX240K1 and GX240U1. Correct valve guidance helps maintain compression, reduces wear on the valve and seat, and supports consistent starting and performance. Supplied to the original Honda pattern with the correct outer and inner geometry, it is intended as a like‐for‐like replacement during head overhauls or routine top‐end maintenance.
Key Features:
- Maintains accurate exhaust valve stem alignment for smooth running and efficient sealing
- Durable, wear‐resistant construction for long service life in high‐temperature exhaust conditions
- Precision internal bore helps preserve correct valve stem clearance when installed to specification
- Matches Honda dimensions and tolerances for a straightforward replacement during rebuilds
- Helps dissipate heat from the exhaust valve to the cylinder head for thermal stability
- Reduces valve and seat wear, supporting reliable compression and easier starting
- Suitable for heavy‐duty use on construction, hire, and landscaping equipment powered by GX engines
- Compatible with multiple Honda horizontal and vertical shaft engines listed below
- Ideal preventative replacement when refurbishing heads showing guide wear or valve wobble
- Supports consistent emissions and fuel efficiency by keeping the valve seated correctly
Typical Applications:
Used during cylinder head repairs and engine overhauls on Honda GX‐series engines fitted to generators, plate compactors, water pumps, pressure washers, cement mixers, lawn and turf machinery, and similar equipment. Replaces worn guides that cause excessive valve play, smoke, loss of power, difficult starting, or noisy top‐end operation, restoring proper valve motion and sealing.
Also known as:
Exhaust valve guide, valve stem guide, cylinder head valve guide, exhaust guide bush, engine valve bush, valve sleeve, guide bush for exhaust valve.
Fits Models:
EC5000, GX240K1, GX240U1, GX240UT1, GX240UT2, GX270, GX270T, GX270T2, GX270U, GX270UT, GX270UT2, GX340K1, GX340T1, GX340T2, GX340U1, GX340UT1, GX390K1, GX390T1, GX390T2, GX390U1, GX390UT1, GX390UT2, GX610, GX620, GXV340RT2, GXV340T2, GXV390, GXV390K1, GXV390RT1, GXV610, GXV620
Alternate Part Numbers:
12205-ZE2-305, 12205ZE2305
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