B/W 71c transmission

[Sheena]

Hello

We have a 1973 Trojan F31 boat with twin 318 Chryslers and BW Velvet Dr 71c
transmissions.

My starboardside xsmn is no good. I have a portside xsmn from another engine,which is good

Are these xsmns interchangeable.

Thanks

[gonzo]

Yes, but you have to set the drive pump to the engine's rotation.