finish_location="Yacht Haven Annapolis Eastport MD" purpose="Return to Yacht Haven Annapolis Eastport MD" complement="Yoni Bresler" weather="Near calm till south of the Rt 50 bridge, then force 3 up the river." charts=['12283'] chart_url => "http://www.charts.noaa.gov/OnLineViewer/" chart_suffix => ".shtml" start_engine="419.9" finish_engine="421.6" fuel="5/8 tank" copyright="Jonathan M. Bresler" %]
Bit of a to-do to start the engine due to the cold temperatures overnight.
After starting, no water exiting the exhaust. Motored from the travel lift to the end of the dock so that the travel lift and its slip was available to others.
Removed raw water pump and verifed installation and condition of the impeller. Went to switch to the spare impeller...a Yanmar impeller with a keyway, not a Johnson impeller with bar/rod running from one side of the hub to the other. Not good. Reinstalled old impeller and reassembled engine.
Verified excellent water flow before the Groco raw water strainer. Removed hoses at the entrance and exit of the heat exchanger to verify flow...the is flow, much less than at the strainer due to pump not moving that much water? Motored to Yacht Haven Annapolis checking temperature with an infrared digital thermometer...got the expected values of 166* at injectors and 10 to 15* temperature rise in raw water across the heat exchanger. Appears that the raw water pump fitted to the engine, a Johnson 10-24509-02 is for the Yanmar 2GM20, NOT the Yanmar 2GM20F installed. For a Yanmar 2GM20F, the proper pump is the 10-24509-01 which has a higher flow rate due to the thicker "cam" in the pump body. (See JMP Marine)
GPX formatted track Distance: 7.42nm, estimated average speed: 5.0kts, estimated duration: 1:28