My experience is totally different than Thomas’s. When I repowered, I had to first remove a pair of 75HP diesels and their sail drives. Then patched the sail drive holes in the bottom of the hulls. Next was installation of straight shafts and associated bits and pieces.
the motor mounts from ThunderStruck-EV.com were a straightforward installation with care taken to line up with the shafts. The motors bolt to the mounts and self align with the shaft pulley.
controls and instruments require wire runs to the bridge/cockpit. With Sevcon controllers I purchased the Sevcon ClearView screens. These give you RPM, FNR, Amps used, volts and battery charge.
when you build your battery, you’ll need a BMS. You can get them with a remote screen (mine is a Chargery) or a Bluetooth connection to your phone or tablet. The BMS can also disconnect the load bus if a cell gets close to a lower voltage limit.
some BMSs can communicate with a shore charger - usually if the same brand (Chargery has a matching charger).
Cells can be purchased direct from China - I can give you s reliable source should you desire. A 48v battery takes 16 cells. Mine are 1,000AH each but you can use a lot less.
as a boy I played with electric trains building engines and cars from kits. If you are comfortable with electricity, there is no real difficulty in the wiring - leading the wires in my case was the hardest part.
in your case you have the prop and shaft installed - plus exuding motor mounts/stringers. You may need to add to the stringers to match the motor mount - not a big deal. My entire conversion was done over a 3 month period.
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