Hello,
Why does my engine loose raw water suction after a day of sailing and/or a fast turn in rough weather?
The most recent was last Friday 9/6. Dockside raw water discharge OK. Departed harbor enroute to nearby port at distance of 2 miles, raw water discharge OK, engine rpm 1800. Prior to entering destination harbor, I made a full turn to port (360 degrees), rpm 1800. Sea waves 3-4 feet, wind 20. At end of turn I notice no discharge of raw water from exhaust. Engine temp rising steadily. Stopped engine, quickly raised storm jib, and sailed into port. Inspection of the sea strainer, raw water pump (gear driven) and impeller OK. It took about 30 minutes to inspect system. I started engine and again had raw water/exhaust discharge. I returned to home port at 1500 rpms w/o further suction loss. All hoses brand new, fittings tight. Heat exchanger dipped and cleaned - works properly. Many articles refer to broken impeller, improper mounting, loose connections, etc., I have inspected all, all are OK. Suction inlet is unobstructed.
Please help. Thank you!
Why does my engine loose raw water suction after a day of sailing and/or a fast turn in rough weather?
The most recent was last Friday 9/6. Dockside raw water discharge OK. Departed harbor enroute to nearby port at distance of 2 miles, raw water discharge OK, engine rpm 1800. Prior to entering destination harbor, I made a full turn to port (360 degrees), rpm 1800. Sea waves 3-4 feet, wind 20. At end of turn I notice no discharge of raw water from exhaust. Engine temp rising steadily. Stopped engine, quickly raised storm jib, and sailed into port. Inspection of the sea strainer, raw water pump (gear driven) and impeller OK. It took about 30 minutes to inspect system. I started engine and again had raw water/exhaust discharge. I returned to home port at 1500 rpms w/o further suction loss. All hoses brand new, fittings tight. Heat exchanger dipped and cleaned - works properly. Many articles refer to broken impeller, improper mounting, loose connections, etc., I have inspected all, all are OK. Suction inlet is unobstructed.
Please help. Thank you!