Spuddy
Active member
I've been tussling with raw water cooling for a while. Exhast elbow needed doing but didn't sort problem. Impeller checked of course. Did the Rydlyme treatment through the block. Better but still no GLOOP GLOOP at tickover. Tthe boat settles into Medway mud at half tide ....could there be clogging in the saildrive leg inlet. Improvised the mains hose to fit the seacock and gave it a good long backflush. SUCCESS. Never come across mention of this before.