I have a diesel Volvo Penta motor with a Dou prop DP-E 1.78 out drive. The whole package is rebuilt with an hour and a half on it. I don’t know who rebuilt it. It was done somewhere down in Southern California a few years back. When I got it I took it in for a full service and then ran it a few times and had the mechanic pull it out. So I could rebuild the boat.