Mercury - Mercruiser 25-54029 Powerhead O-Ring (2.800 x .103)
Genuine OEM Mercury - Mercruiser part. Replacement powerhead O-ring for Mercury Outboards.
Lower O-Ring Application:
70 (3 cyl) - s/n 0B240451 and up
80 (3 cyl) - s/n 0B240451 and up
90...
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