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If a Mercury parts diagram does not match what is physically on your engine, it usually means the serial number does not reflect all installed components. This commonly happens due to running production changes, replaced brackets, aftermarket parts, or prior owner repairs. Verifying fitment before ordering prevents wrong parts and returns. This issue is one of the most common reasons people order incorrect outboard parts. It is also one of the most preventable. The diagrams shown in the Mercury …

The most accurate way to find the correct parts for a Mercury outboard is by using the engine’s serial number. Parts diagrams and listings are organized by serial number ranges, not just by model year. Starting with assumptions instead of the serial number is the most common reason people order the wrong part. Ordering the wrong outboard part almost always comes down to one issue. The lookup process started with an assumption instead of a serial number. If you want to find the correct part …