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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 MountjoysvPegasusLF38 just west of Ballard,
WA.
------ Original message------From: Hoyt, Mike via CnC-List Date: Mon, Aug 10,
2015 10:10To: [email protected];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:[email protected]]On
Behalf Of S Thomas via CnC-List
Sent: Monday, August 10, 2015 2:01 PM
To: [email protected]
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 ThomasC&C27 MKIIIPort Stanley, ON----- Original Message
-----From:Martin DeYoung via CnC-ListTo:[email protected]:Martin
DeYoungSent: Monday, August 10, 2015 12:24Subject: 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.
MartinCalypso1971 C&C 43SeattleFrom: CnC-List [[email protected]]
on behalf of Hoyt, Mike via CnC-List [[email protected]]
Sent: Monday, August 10, 2015 9:17 AM
To: [email protected]
Cc: Hoyt, Mike
Subject: Stus-List 3GM30F Oil Pressure warningOil 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
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