Nordhavn 40 propeller

4 blade propeller for a Lugger L-668 naturally aspirated 105 HP Diesel Engine
The keel of the Nordhavn 40 Mk II has a fully enclosed shoe.
The protection for the propeller is superb.
This is the ideal keel in my humble opinion.
Protection to the propeller saves money on repairs if you end up somewhere too shallow, hit rocks. Prevention beats repairs hands down. Think of the time a boat may be on the hardstand while repairs are made. Valuable summer time when you could have been on the water. Avoided if you had a full shoe.
The only thing I would add to this for peace of mind would be a prop shaft line cutter. Again preventing your propeller from stopping with tangled rope or fishing lines. Beware they are sharp but because of the full shoe if you were swimming below inspecting your boat you have the aid of the shoe to help avoid putting your hand near the cutter blade.

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