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I know this sounds stupid... But have you checked the oil level? Low on oil
will cause just what you are describing. Martin has a good suggestion. I had
problems with my engine warning horn so I installed both mechanical oil
pressure and water temp gauges. I put them inside the lazerette.
Doug MountjoysvPegasusLF38 just west of Ballard, WA.
------ Original message------From: Hoyt, Mike via CnC-ListDate: Mon, Aug 10,
2015 09:18To: cnc-list@cnc-list.com;Cc: Hoyt, Mike;Subject:Stus-List 3GM30F Oil
Pressure warning
Oil changed in May. Used 15W 40Oil level checked July 22300 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
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