I just took delivery of a used Yanmar 23 hp, and am working on the installation in my 1938 Malabar Jr., ZEPHYR. I have run a wire from the center of the stern tube through the engine compartment as reference for the axis of the drive shaft and transmission coupling. I also built a template of the motor with a hole excatly at the center of the transmission coupling, and coresponding hole at the other end of the template. The idea being, I can align the holes on the template with the wire through the stern tupe, giving me the correct orientation for new timbers and engine bed.
It's a tight fit, and I'm concerned any play in the rig will cause problems when I install the engine.
Am I doing this right? Is there an alternative procedure (other than hiring someone to do it)?