1987 Sea Ray Express Cruiser w 375 Cats

[dougl33]

A friend of mind is trying to get his 1987 39 Express Cruiser up to snuff. Its an 87 and has the 375hp Cats.

Does anyone know what this boat came from the factory with as far as trans ratio and prop size? The only thing I can find on line is that it may have come with 20x25 props, but I'm not sure.

I tried using the search function, but I couldn't really come up with anything.

Thanks in advance for your help.

Regards,

Doug L.

 

[dougl33]

Never mind. I found some info on the Sea Ray prop charts for an 89 39 EC with Cats. The trans were Twin Disk 507's with a 1.5:1 ratio and 20x25 props.