Cooling water flow? When changing the light bulbs or wiring in the past it is easy enough to imagine a mixup. Checking engine temp is where I would start.
You could also have a very slight dilution of your oil with fuel. After it gets hot enough the viscosity drops and causes your low pressure alarm. The priming pumps have a rubber diaphragm that when degraded allows diesel into the crankcase. Bad HP injector pump seals can also let fuel in the crankcase. Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Aug 10, 2015 12:18 PM, "Hoyt, Mike via CnC-List" <cnc-list@cnc-list.com> wrote: > Oil changed in May. Used 15W 40 > > Oil level checked July 22 > > 300 mile delivery to Cape Breton (Dundee then Baddeck) July 23 – Aug 2 > > > > Yesterday after running engine at 2800 RPM for approx. 5.5 hrs a “clicking > sound” was heard in cockpit. Thought at first was from Ram mic but was > still there once disconnected. Determined was coming from alarm speaker on > Yanmar panel. Tapped panel and then Oil pressure light illuminated and > alarm sounded. Shut down engine and sailed to dock (without crashing) > > > > At dock started engine and at idle no alarm or light. Revved up to 3000 > RPM and the light started flickering and a sputtering sound from the > speaker (the clicking sound we heard earlier) which was followed by full > illumination of Oil pressure light and full alarm siren. Stoped engine and > waited. > > > > A few minutes later retarted engine and had no alarm at idle, followed by > sputtering and then full alarm at high rpms. Reduced RPMs to idle and alarm > stopped and light turned off. > > > > Any thoughts? > > > > Boat is currently 3.5 hrs away by car so any parts will have to be taken > with me in advance > > _______________________________________________ > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go to the > bottom of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > >
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