Humber Destroyer 5.8, Johnson 115 with a 17" prop
1 fat person
about 75L fuel
max speed ever recorded on GPS 36.1kt
normally won't get past about 35.4/35.5 so assume the above may have been following tide
Getting a 19" prop so will be interesting to see if that makes any difference as the engine feels like it could give more.
I also discovered recently that the engine (which is a FastStrike variant) still has the running in restrictor fitted so I could get another 500rpm if I could figure out how to chisel that off, that and a 19" prop might see the hectic side of 40