Hi guys and lasts new to rc boating but got the bud bad.I had 4 strokes 3 years ago when I used to build custom motorcycles so now into rc boats got 36 which I'm rebuilding 20 of which 3/4 done.so I might be asking for advice from time to time.I'm a sprayer so if I can be of any help to any one please feel free to ask I'm always will to sort out paint problems.Great site and you all seem friendly.Right now I've said hi back to topic my F1 She is 47inchs long by 20wide big gal wooden main frame and ply skin gel coated over so heavy about 10kg I've got a few engines I can used but need you advice what you might use,30cc water cooled marine 2 stroke,cmb 90 merco 61, or electric scooter motor 120 watt 24 volt dc motor she came with no canopy which I had to make and rear mounted rudder single.submerged propeller middle mounted.which engine or motor would you use,surface mounted propeller or submerged twin mounted rear rudders,and rough size tweak later any advice greatfully received.sorry for going on at length mike. engine is 61 merco