we took a knock down sort of like Steve (off the Baja). But did not have the sail or fire problem.

What we did was hang a Sunbrella cover down from wood trim that snaps across the bottom and covers our Yanmar panel. When we use the engine the Sunbrella unsnaps and flips up, and out of the way, and it held up under the bridge deck locker lid.

It's not water proof, not as good as using a port or cover, but works for us.

Greg