Evinrude G2 300 HP Outboards
WA Lobster Vessel
I have a 40 foot alloy lobster vessel, powered by two G2 300's it weighs about 7 Tonne and has a top speed of 40 knots in calm conditions. My problem is in rough conditions, wind speeds above 18 knots the props cavitate a fair bit. The answer is not lowering the engines.
The boat carries weight extremely well so I was thinking of replacing the outboards with a 450 HP diesel coupled to a Konrad 680 leg, this would add about 200 KG's to the back end which would be fine, the boat likes a bit of weight down the back. The other problem I am trying to eliminate is with the outboards, they can drop 400 revs in the troughs when travelling with a following sea. I would like to finish up with the same 25 knot cruise speed eliminate the cavitation by having a larger prop on the centre line instead of two smaller ones out from the centre, and reduce the rev loss in troughs with the higher torque of a diesel.
My question is would anyone have any Idea if I am on the right track, or would I encounter some other un for seen problem.
Click here to post comments
Join in and write your own page! It's easy to do. How? Simply click here to return to FISHING and BOATS FORUM.