Annual impeller change, done at anchor in flat calm. The old impeller had one vane beginning to crack at the hub but had shed nothing into the heat exchanger. Greased the new one with glycerine, replaced the cover gasket while in there. Ran the engine for ten minutes at 1500 rpm — strong steady stream at the exhaust, temperature holding at 82°C.

Next change due around 950 engine hours or July 2027, whichever comes first.