Erik the Knothead
New member
I've got a BF225 with low compression in three cylinders, and small salt/mineral deposits in some of the exhaust ports in the cylinder heads, though not always in the ones with low compression. The compression ranges from 175-225 psi. The engine had a complete valve job with all new valves about 50 hours ago, also due to low compression and corrosion in the in the cylinder heads. The machine shop had to hammer out some of the valves. We were unable to determine for certain how the salt water entered the engine, but thought it was due to an incident when a failed hose for a water pressure gauge sprayed water on the engine while it was running. The problem is back, and now I'm wondering if it might also have a failure in the exhaust system. The machine shop is pressure testing the cylinder heads now, but I've been reading about service bulletin #56 relating to exhaust tubes and wondering if that could be all or part of the cause. Can anyone send me a copy of the bulletin? Any other ideas how salt water can be entering the cylinder heads? The cylinders and pistons have normal combustion deposits and don't appear to be steamed clean from water entering the cylinders. The head gaskets and manifold gaskets seemed okay.
The engine S/N is in the BAGJ-1400000 group and has 570 hours. It's used solely in saltwater and has been regularly flushed with fresh water after use for the past three years. But it has notable deposits and corrosion in the water jacket so I'm not sure that the previous owner flushed the engine. It's a single engine installation on an Arima 22 Sea Legend.
The engine S/N is in the BAGJ-1400000 group and has 570 hours. It's used solely in saltwater and has been regularly flushed with fresh water after use for the past three years. But it has notable deposits and corrosion in the water jacket so I'm not sure that the previous owner flushed the engine. It's a single engine installation on an Arima 22 Sea Legend.