Yeah, that hose is stiff for sure. On my 3" exhaust
I added a SS bellows, and many power boats have them.
OP: if your hose slopes toward the engine
from the stern with no muffler
you really should try to put a loop above the exit somehow.
On one boat, I even had a large muffler
, the exhaust
exit was about 2-3 " above the water
line. Once sitting at the dock
was lapping into the exit fitting (wind from the stern). It gradually filled the whole system. When I started the engine
next am I bent a pushrod and had a fouled injector. I must have just started it in time before I would have been water locked!