Is all service done from above leaning down???
That picture is somewhat deceiving, it's taken from deck level. There is a '1st level' that has the engine room doors that are open in the pic, then you climb down into the engine room. Like I said, the starboard side is the 'spacious' engine room, the port side is smaller as the generator sits on the 1st level, hence the engine room doors are narrower. On the port side, you can only stand on one side of the engine and have to bend over to work on the port side of the port engine (oil filter, etc.).
Everything is a compromise.
FP, with the Belize model, was one of the early adopters of the 'engines outside the living space', and hence the engine/saildrive is mounted too close to the rudder, IMO. Reason I say this is there is not enough room between the saildrive leg and rudder for a folding prop. Yeah, feathering would work but not folding. I've often thought they should have flipped the engine around with saildrive in front and just rotate the lower leg 180į. But this would have caused them to add the saildrive leg extension which probably would add $50 to the cost
I've thought of doing it myself, but that project hasn't made it high enough on the priority list, yet! Maybe if I ever have to repower....
So all the batteries, engines, generator, fuel tank is aft of the aft bulkhead (which has only one hole in each engine room (with a plug in it) way above the waterline to stick a fire extinguisher thru), no chance for smells/heat to creep into the living space.