Yamaha 90Hp 2stroke spot on, arguably the best of the carb'd two strokes in all respects from performance and reliablility to resale.
I ve spent abit of time driving a 5.1m with a 60 Yammie and it handled very well, felt alot bigger than 5m, and was a nice balenced boat.
Tornado's are good sea going rib allthough you need to watch out for the tubes which are PU as opposed to Hypalon, more difficult to repair and I have heard of several instances of the seam going with the solution being a retube £££, best wait for one of the tube guys to comment as i don't know the exact details other than vague experience with a club boat.
The RYA choose the 5.1m usually with a Yamaha 4stoke for their rescue boat fleet.
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