Yanmar 3GM30F

[robbieg]

I am slightly concerned about the oil pressure of my diesel. It currently has a sender which operates a buzzer/light if pressure falls. I would like to connect a gauge on a tempory basis so I can see the actual pressure at various engine RPM. Anyone tried this & if so what kit so I need to do it. Is it possible to rent the gauge/sender etc rather than buy?

Thanks.

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[Birdseye]

not that difficult to connect one - just a T piece with one outlet for the guage, and one for the warning buzzer. would have thought you could get one from a motor factor or out of a motorsport mag. but you will probably have to buy or alternatively get your local dealer to check for you

why are you concerned?

<hr width=100% size=1>this post is a personal opinion, and you should not base your actions on it.

 

[robbieg]

On start from cold I normally turn the engine over with the engine decompressed until the oil pressure alarm goes off & then start up. If I stop the engine & then start up again in a short time (say 5 mins) the alarm comes on for a second or so & then goes off.

However if I stop for an hour or so & then start up it seems to take a long time (probably only 5 seconds or so but it seems for ever whilst the buzzer whistling away!) for the oil pressure alarm to go off. My memory may be playing tricks but I think that it used to only take a couple of seconds for the alarm to go off when starting from warm-hence it seems to take longer to build pressure & so my concern something may be going wrong.

Oil levels fine, engine seems to be running ok so may be worrying over nothing. Certainly when I stop the engine it alway seems to take a while for the buzzer to come on suggesting the pressures holding up relatively well. Still I can't shake the feeling that the buzzers sounding for longer than it use to......



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[Courageous]

Sounds like a similar setup to my own Robbie although I have the oil pressure gauge too. You can buy the sender and gauge from VDO and there is a port on the engine ready to accept this with (I believe) no requirement for a tee although I stand to be corrected here. Boat's in spain so can't check readily but if you get no joy here in a few weeks I'll be down there and will take photo's for you.

The time taken for your buzzer to silence doesn't sound that bad to me either.

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[jax]

Hi, Contact www.yanmarhelp.com a good web for info.

Regards Jax

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[snowleopard]

the workshop manual has a page on how to do this. PM me your email address and i'll send you a scan of the page.

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[TheBoatman]

DON'T worry about it.

It's perfectly normal for the buzzer to go off on start-up. The oil pump is mechanically driven by the engine and needs time to build up pressure. 5 seconds is neither here-nore-there as there is oil on the bearings/pistons, etc which will lubricate them until the pressure builds. If you want to cut the time the buzzer goes off down, then open the throttle up and that will reduce the time down, but it's totally un-necessary. Even 10-15 seconds is not a problem. All you have to worry about is if it continues to buzz after (say) 30 seconds, then you may have a problem with oil pressure.

I am responsible for looking after our club boats and I have 2 Yanmah 3GM30's and what you have described is perfectly normal and my boats are used on average 30 hours / week, are started and stopped many times during that time, both are more than 5 years old and the buzzer goes off for at least 5-7 secs each time thay are started. Both engines are in perfect condition and if anyone was to ask me to recommend a strong engine that requires little maintenance, is relieable, spares readily available etc, then I would have no problems in saying buy a "Yanmah"

Peter.

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[jfkal]

Please send to me too: jfkal@dexteritas.com Thanks Joerg


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[jfkal]

Please send to me too: jfkal@dexteritas.com Thanks Joerg


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[Nick_Pam]

Don't worry - our Dehler is fitted with exactly the same engine and you have absolutely accurately described the starting scenario with our engine too.
I would add that on first start up from cold, after a week or so without use, the buzzer sings at "half volume" on ours...this is because there is an exhaust high temp alarm in the circuit too and until it registers some heat after a couple of minutes running, it makes the buzzer whistle half-heartedly!! I think you'll notice that although the buzzer is going, there are no lights on.
I've had it checked a couple of times, including during the pre-purchase survey and am confident that it's just a foible of the engine panel and the Yanmar.

<hr width=100% size=1>Is it really 42???