Oil Pressure sender . YANMAR . 4 L HASTE.

[oldgit]

Two thoughts:
1. Swap the engine sensors and see what happens (and/or swap the gauges too).
2. Check that the low oil pressure reading is in fact correct; I bought a professional pressure testing kit, complete with a range of connectors for a few quid on the internet, that showed the sender/gauge was showing the actual pressure correctly. However, that low reading was deemed acceptable by Yanmar for idling. When I had Yanmar 4JH2-UTE engines, I found the following quotation in a Yanmar manual:
Engine speed 3000 rpm ---- 4.0-5.5 kgf/cm^2
Engine speed 800 rpm ---- 0.6 kgf/cm^2 (I suspect this is a minimum).
Another note I have from days of owning those engines:
Yanmar type oil pressure sender PN:119773-91501. This sender has a
pressure range of 0-8 bar with a resistance range of 83-12 ohms

Thanks for those observations.
Having only had VP engines with their OP gauges marked with PSI, was disconcerting to see the needle on the Yanmar gauge so close to the "Red" section of the dial at idle.
It would appear this has been the cause of much consternation to many other boaters with Yanmar engines over many years. In common with all the other postings on the net on this subject , the separate alarm had not been activated.
The usual path of action seems to be, check the oil pressure with a test unit and if within acceptable limits either ignore the gauge reading or buy a genuine replacement Yanmar sender which has solved the problem.
Some have simply changed the gauge and sender( on both engines if twin set up.)


Will probably go down the check pressure with independant tester and leave it at that until can summon up enough enthusiasm to investigate further.

 

[vas]

Yanmar type oil pressure sender PN:119773-91501. This sender has a
pressure range of 0-8 bar with a resistance range of 83-12 ohms

try to match that with a cheaper VDO sender oldgit!
I'd do the swap sender left right and see if issue moves over first of all though!

V.

 

[oldgit]

try to match that with a cheaper VDO sender oldgit!


V.

Thanks to all that contributed, going to find a sender with those specs.

 

[Hunterlees]

I bought a dual station VDO sender from Furneux Riddell to replace a dead one and it ranges from 5-90 ohms to work with 2 Faria USA spec 5bar gauges.

 

[PeterBoater]

I bought a dual station VDO sender from Furneux Riddell to replace a dead one and it ranges from 5-90 ohms to work with 2 Faria USA spec 5bar gauges.

Yes, dual station senders are half the resistance of single station senders (I think that's the correct way round).

 

[oldgit]

just an update
Single Station Oil Pressure Senders - for VDO Gauges Reading to 150 PSI

 

[ducked]

This any good

www.alibaba.com/product-detail/2pcs-183250-39450-Oil-Pressure-Sensor_1600690420249.html?spm=a2700.galleryofferlist.normal_offer.d_title.11e113a02EAmJ9&priceId=082fc74905f449798070a40505c3130f

That'll be Chinesium though.

I've just bought a couple of 1GM10 bits (starting handle and injector) from SUNITY up the road in Taipei City, so only sort-of Chinesium, Hopefully get them monday. Their web presence isn't well organised for searching though (I THINK only goes through Alibaba) where some items have minimum order quantities that probably dont apply to local direct purchase. I'll have a look later.

Update: Only seem to have oil pressure sensors for Mitsubishi and Cummins engines, and seem to be distributor rather than manufacturer of those, so they'll be Chinesium, though there are also some generic/automotive sensors listed

So no use I'm afraid, sorry

 

[oldgit]

This any good

www.alibaba.com/product-detail/2pcs-183250-39450-Oil-Pressure-Sensor_1600690420249.html?spm=a2700.galleryofferlist.normal_offer.d_title.11e113a02EAmJ9&priceId=082fc74905f449798070a40505c3130f

That'll be Chinesium though.

I've just bought a couple of 1GM10 bits (starting handle and injector) from SUNITY up the road in Taipei City, so only sort-of Chinesium, Hopefully get them monday. Their web presence isn't well organised for searching though (I THINK only goes through Alibaba) where some items have minimum order quantities that probably dont apply to local direct purchase. I'll have a look later.

Update: Only seem to have oil pressure sensors for Mitsubishi and Cummins engines, and seem to be distributor rather than manufacturer of those, so they'll be Chinesium, though there are also some generic/automotive sensors listed

So no use I'm afraid, sorry

That sensor from the USA is a direct replacement and electrically matches the Yanmar/Faria gauge.
Physically it is also has the correct male BSPT thread to directly fit into female thread in the engine block, without the need for a BSPT/NPT adaptor required to adapt any/all the cheapo chinese NPT sender units.

Rumours it is possible with get a chinese sender to go partway into the Yanmar threading before it jams and or strips the thread.
Getting it back out to stem the leaks might be problematical.