Glad to hear the group is still doing well, I used to be out every week in their other SR4!
Sadly I don't have any leads on any suitable engines, but hope you can find something for them. One of the Sea Cadet groups I now work with has an SR4 with a Yam 50 4-stroke which really makes it too tail heavy, so I think a 40 would be preferable, unless there is a very light 50hp option out there?
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