BoatBanter.com - View Single Post - Plugging exhaust to avoid hydrostatic lock

writes:

Putting styrofoam plugs on a lanyard might be a fairly questionable
solution.
If you forget to remove your plugs before starting and they "pop out"
what keeps the lanyards out of the props, most likely pretty nearby?

Lanyard goes up above. Nothing can reach even close to the outdrive.

It's hard to imagine serious following seas hitting your stern when
"anchored out," assuming that you anchor from the bow like 99% of us do
and that your boat is free to circle the hook as the wind or current
changes.

Seems like 12 inches of exhaust port freeboard on the stern in a 4-foot sea
is going to get slapped with a lot of chop. And it doesn't take much of a
pitch to get the waterline bobbing up to the ports.