I have been advised after boat wash down after use, to take the cover off the outboard engine, (Suzuki 200hp) and spray the gubbins with Water Dispersant spray ... this will drive off the water and leave a protective film .... the advice was to use a proper water dispersant in a hand held trigger spray, far better than WD40. The product name I was given .. SanBell DeWaterring Fluid, is no longer made ... anybody aware of any such similar product ? I have done a bit of Googling... and found a Silverhook brand
Rick