sea water in cylinder from exhaust, how to avoid repeat...

[Courageous]

Sure it will be. Thanx for picking up on it though.

 

[bikedaft]

You need to let air into the system when the engine stops. If you don’t the water would not drain from the coarse filter even when it is above the waterline.
I think you will find without the anti siphon loop water would stay in the inlet pipe

think that's the nail in the coffin of one idea.

thanks for the replies folks.

will fit a sea cock to the transom exhaust outlet, and drain the exhaust somehow whether intermittently with bits of hose from waterlock, or by drying exhaust with "T" valve in sea water outlet side somewhere

cheers!