Hello I have a boat with 2019 d4-300s in it….long story but had a turbo fail and came home on one engine….we ended up using a line to secure the dead prop so it wouldn’t windmill but curious if that is necessary….shaft seal has a scoop and uses water to cool but that would have been fine…transmission is an oil bath mostly but my mechanic said there could be a gear oil pump or some part of it need to be running in order to prevent damage? Thoughts? Thanks