Hello and I'm hoping someone on this amazing forum can help me help a friend. He has an F100 for quite a few years and I asked him recently when he'd last got it a Timing Belt. Never was the answer and he'd bought it at an auction about 5 years ago with a fresh service but no history. When I looked at it to check the date codes I found the transom bracket had been completely repainted previously due to a leak of ATF fluid from the hydraulic steering. So the Yamaha factory serial label has been obliterated. Also the date code label on the other side of the bracket is either gone or buried under paint. He says the serial number is Three One Seven Five Six Two from his insurance documentation. That reads like it's in the correct range but doesn't include any date code letters so I can't tell how old the engine is.
Can anyone please advise where else the engine number can be found e.g. stamped into the block and whether there's any way to tell the year of manufacture which may well be how old the Timing Belt is on this engine.
Many thanks for your help!