model number of 135xd

[Skeeter456]

I bought a 135xd black max outboard motor. The plate on the transom is missing. I was looking for another stamp on the motor but not sure where it is exactly. There is a silver disc on the top of the block with 314932 but don't think that's it. Firing order stamped on block is 123456. Cover comes off on each side and a red line thru mercury. The controller is made in 1992, but could have been replaced. Spark plugs are bu8h. Can anyone help located model #? Thanks