1990 Mercruiser service manual numbers?

[cloud_master]

Hello all. I'm purchasing a 1990 SD 280 this weekend; and I'd like to get the proper service manuals. It has twin 4.3L's with Alpha drives. I thought service manual #18 was the correct manual for the engine, but I haven't found one to be applicable to the '90 model year as of yet. I believe #6 is for the drives. I do not have the s/n of the engine or drives as of yet...

Thanks for the help.

 

[Little Ducky]

Once you get the S/N's for the engines and drive it will make the search easier.

They should be listed on top of the engine cover.