Finegrain,
Let me pick your brain a bit using the "sales pitch" from the dealer.

They claimed that the "new and improved" Volvo Ocean Series OSI-XDP is rust prove.
Everything on the engine is stainless or brass and a special paint is used.
The drive unit is composite.

As for fishing space, we measured the area of the both boats with different drives and found that both boats have the same space. However the outboard exhibits more interference in the water.

For maintenance purposes, how do you maintain or clean the outside area of an inboard engine after saltwater use?

Thanks
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Know fish or no fish.