Mike, I experienced the very same thing on Ocean Pearl last year. After months of trying to install a mechanical oil pressure gauge (never could get the threads to match) and checking with the old Yanmar gurus - who said I had lots of oil pressure -I discovered a loose connector on the temp sensor unit. Replaced that very old unit with new and she's been singing beautifully ever since. I was seeing the panel lights incorrectly - it was the temp alarm, not oil pressure. No false alarms now. 2 cents. Dan Ocean Pearl C&C 32
On Mon, Aug 10, 2015 at 3:25 PM, Hoyt, Mike via CnC-List < cnc-list@cnc-list.com> wrote: > OK. > > > > So the service manual says to connect the oil pressure gauge to the pilot > lamp unit for primary pressure and lubricating oil pipe connector for > secondary pressure. > > > > Where is the pilot lamp unit? > > > > Mike > > > > > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of * > svpegasu...@gmail.com via CnC-List > *Sent:* Monday, August 10, 2015 2:48 PM > *To:* cnc-list@cnc-list.com > *Cc:* svpegasu...@gmail.com > *Subject:* Re: Stus-List 3GM30F Oil Pressure warning > > > > Mike, summit racing is a great place to get gauges. Prices are good and > delivery is fast. The connection on the engine I believe is std 1/8th pipe > thread. At least that was true on my 3qm30. > > The list is on the right track for your problem. Good luck. > > Doug Mountjoy > > svPegasus > > LF38 > > just west of Ballard, WA. > > > > > > ------ Original message------ > > *From: *Hoyt, Mike via CnC-List > > *Date: *Mon, Aug 10, 2015 10:10 > > *To: *cnc-list@cnc-list.com; > > *Cc: *Hoyt, Mike; > > *Subject:*Re: Stus-List 3GM30F Oil Pressure warning > > > > So likely the best place to start is to change the oil and filter first > and then check oil pressure. > > > > On phone to yanmar dealer to find out where to get a manual pressure guage > and where I attach it to engine to test … > > > > Engine was not putting off excessive heat that I could notice. Did not > get a chance to check coolant level but can top that up also. I believe > that is a different light on the panel though. We have the B type panel and > Oil Pressure lamp is second from right while water temp warning lamp is > third from right. The water temp lamp was not illuminated > > > > > > > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com]*On Behalf Of *S > Thomas via CnC-List > *Sent:* Monday, August 10, 2015 2:01 PM > *To:* cnc-list@cnc-list.com <%20cnc-l...@cnc-list.com> > *Cc:* S Thomas > *Subject:* Re: Stus-List 3GM30F Oil Pressure warning > > > > Also not expensive to get a mechanical oil pressure gauge and hook it up, > even if you only want to do it temporarily. Actually just about any > mechanical pressure gauge will work for test purposes, including air > pressure gauges, just get one with an appropriate pressure range. > > > > Steve Thomas > > C&C27 MKIII > > Port Stanley, ON > > ----- Original Message ----- > > *From:*Martin DeYoung via CnC-List <cnc-list@cnc-list.com> > > *To:*cnc-list@cnc-list.com > > *Cc:*Martin DeYoung <mdeyo...@deyoungmfg.com> > > *Sent:* Monday, August 10, 2015 12:24 > > *Subject:* Re: Stus-List 3GM30F Oil Pressure warning > > > > Was there any noise from the engine that sounded like it was short of lube > oil pressure? > > > > It is an easy and low cost test to buy a new oil pressure sending unit. > Install it and test again with the engine at normal operating temp. > > > > If you still get the warning it is likely the lube oil pump. > > > > Martin > > Calypso > > 1971 C&C 43 > > Seattle > ------------------------------ > > *From:* CnC-List [cnc-list-boun...@cnc-list.com] on behalf of Hoyt, Mike > via CnC-List [cnc-list@cnc-list.com] > *Sent:* Monday, August 10, 2015 9:17 AM > *To:* cnc-list@cnc-list.com > *Cc:* Hoyt, Mike > *Subject:* Stus-List 3GM30F Oil Pressure warning > > 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 > > > _______________________________________________ > > 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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