Originally Posted by Polwart
Don't think that is accurate? Pretty sure Windermere requires registration as will many of the other lakes with speed limits (to help enforce it).
Fuel economy matters less at this end of the engine market though. 30 L will probably last you all day on a 20HP. Fuel is expensive at the moment, but +/- 20% isn't going to cripple you or save you a fortune (whereas with a much bigger engine burning 30L/hour it might!).
Yup, forgot about that! been some years since on windemere, but if you went to ullswater, no licence needed there, (only there in spring) great fun island hopping!
Our 25 mercury used about 4/5 litres all day, happily at 23mph (when the lakes patrol guy was off the lake! only short bursts of course! )
Now we have a 135 mariner! (gulp swig swig)
FWP 5000 You will get pretty bored with the lakes as far as boating is concerned, a few times there and you`ll be gaggin for some more speed!
As ribrage says, though, have a think about getting properly kitted up first on the safety side, having the proper equipment only adds to the fun!