"I just bought a boat that has
"I just bought a boat that has a 4.3 merc in it. I'm having problems with determining what year the motor is actually from.
On the valve cover the serial number is gone, but it says the motor has 175hp. On the cover that goes over the spark arrestor, the engine serial number is almost completely gone. All that can be made out is B7. Towards the back of the block there is a tag that from Mercury that says B790836. I am not sure if thats the actual engine number, or if that's a block number (since the engine serials are supposed to start with OB...). There is another number on the outdrive that reads OB852551 and yet another on the carb that reads 3304-9565.
If anyone familiar with these serials can help me out I'd really appreciate it.
-edit- I just saw the post a few down from this one, sorry for not looking at the new stuff before I posted. "
"I just bought a boat that has a 4.3 merc in it. I'm having problems with determining what year the motor is actually from.
On the valve cover the serial number is gone, but it says the motor has 175hp. On the cover that goes over the spark arrestor, the engine serial number is almost completely gone. All that can be made out is B7. Towards the back of the block there is a tag that from Mercury that says B790836. I am not sure if thats the actual engine number, or if that's a block number (since the engine serials are supposed to start with OB...). There is another number on the outdrive that reads OB852551 and yet another on the carb that reads 3304-9565.
If anyone familiar with these serials can help me out I'd really appreciate it.
-edit- I just saw the post a few down from this one, sorry for not looking at the new stuff before I posted. "