Serial numbers in the 1970s–1990s were often 7 or 8 digits (e.g., J1234567). The prefix letter (e.g., “J”) sometimes indicates the factory.
: Once found, take a clear photo or write the numbers down in a safe place for future reference, as these tags can degrade over time.
: This is the most reliable backup. It is a small, silver, round disc (about the size of a quarter) pressed into the engine block or powerhead.
: Older engines (pre-1970s) typically use a metal plate with embossed numbers, while newer models use a printed sticker . Secondary & Backup Locations
Serial numbers in the 1970s–1990s were often 7 or 8 digits (e.g., J1234567). The prefix letter (e.g., “J”) sometimes indicates the factory.
: Once found, take a clear photo or write the numbers down in a safe place for future reference, as these tags can degrade over time.
: This is the most reliable backup. It is a small, silver, round disc (about the size of a quarter) pressed into the engine block or powerhead.
: Older engines (pre-1970s) typically use a metal plate with embossed numbers, while newer models use a printed sticker . Secondary & Backup Locations