4BY2-180 oil pressure query

[knotflying]

I just did the service bulletin for the oil pressure "fix". Now my oil pressure seems to be running at 14 pounds at Idle and as high as 49 pounds at WOT. This is lower than what I was getting prior to the fix. What are other people getting on their readings?

 

[HRowland]

There are two parts to YASA2014–005-M, one is the new oil pressure sensor ground line connection and the other is a software update to the engine interface unit. Per the advisory, indicated pressure ranges:

Original rev 1.12 software:
@1000 RPM 8.7-14.5 psi
@4000 RPM 51-87 psi

Updated rev 1.13 software:
@1000 RPM 20-51 psi
@4000 RPM 51-73 psi

Idle would be lower than the 1000 RPM indications.

The advisory states that the software update results in indicated pressure readings closer to actual engine oil pressure.

The original 1.12 software was pretty far off for indicated oil pressure at lower RPMs so your reading seems fairly normal. The oil pressure sensor resistance increases as the pressure increases. The new ground connection eliminates some electrical noise and potential high resistance connections and could explain the different indication you now see.

Howard

 

[Hydraulicjump]

I too had this repair and your idle numbers are precisely in line with the performance on my tug. So far, 80 engine hours since the "fix" everything has been stable and to spec. I track rpm, psi, temp every time I am out and everything looks good.

 

[knotflying]

Howard,

Updated rev 1.13 software:
@1000 RPM 20-51 psi
@4000 RPM 51-73 psi

At 1000 RPM I am getting 19 psi and at 4,000 RPM I am getting 49. Close enough I guess.

 

[PhilR]

My oil line let go a year or two ago and I had the line replaced and the engine removed, everything cleaned and reinstalled, compliments of Yanmar (thanks to Andrew). Should I have had a software update?

Phil

 

[Garry Anderson]

I need to do this fix. Is this something I should have done by a pro or can a mechanically challenged person handle it? Also am trying to find the update bulletin...thanks in advance.
Garry

 

[Kaisardog]

It may be wise to have the pros look at this. you have to install the ground properly not just attach where the old one was. yanmar refuses to cover any damage if there was a problem with the original install or service not being to their spec: '' Any issues with oil pressure found to be caused by improper wiring during installation or normal engine wear will not be covered... "" here is the full service bulletin:

Advisory Number: YASA2014 – 005 - M
THIS ADVISORY APPLIES TO: Construction Industrial Marine Tractor
DATE: TO: SUBJECT: MODEL(S): REFERENCE:
Situation
August 11, 2014 All Yanmar Marine Distributors and Dealers Low Oil Pressure Nuisance Alarm/ Oil Pressure Fluctuation BY (2),(3)
It has been brought to Yanmar’s attention that in some instances concerning the BY series engines, end users are experiencing a fluctuation of the displayed oil pressure and/or a low pressure nuisance alarm. The following Service Advisory is being released to address these 2 (two) concerns. Any issues with oil pressure found to be caused by improper wiring during installation or normal engine wear will not be covered.
1. Yanmarwouldliketoinformyouaboutasoftwareupdatetothei81XXInterface modules. The software update to the i81XX interface module is to address the low oil pressure alarm occasionally found on rapid deceleration from wide open throttle. The old software version is 1.12. The new version is 1.13. This new software will bring the displayed oil pressure to a closer range of the actual engine oil pressure. See chart below. Operational manual will be updated to reflect these values.
ENGINE OIL PRESSURE
@ 4000 RPM @ 1000 RPM
CURRENT RANGE AFTER UPDATE
3.5 - 6.0 bar (51 – 87 psi) 3.5 – 5.0 bar (51 – 73 psi) 0.6 – 1.0 bar (8.7 – 14.5 psi) 1.4 – 3.5 bar (20 – 51 psi)
2. ToaddresstheOilPressureFluctuationconcernanewgroundwireisinstalledtotheoil pressure sensor. Yanmar has found that with the current ground there is the potential for interference that can result in an oil pressure fluctuation reading on the gauge. Testing with a mechanical gauge has shown that the actual engine oil pressure does not fluctuate.

Page 1 of 4
When this condition is found, interface modules need to be returned to Yanmar America to be updated. The i81XX will be updated and returned in a timely manner. In situations where timing or location may be an issue YA will provide a swing unit with the understanding that the i81XX with software version 1.12 MUST BE RETURNED.
Please return via UPS Ground Account # V9W444 to: Yanmar America Attn: Michael Angland 101 International Pkwy
Adairsville, GA 30103 Yanmar will cover reasonable shipping cost.
Warranty.
Yanmar will cover this under warranty even if warranty has expired provided the conditions meet BOTH criteria as listed above. Maximum labor will be 1.2 hours to replace the ground and i81XX interface module. When filing a warranty claim please reference the Bulletin number and code as follows:
YASA2014-005-M CODE: 004 ELECTRICAL
FAILED PART NUMBER: 120650-67050, INTERFACE FAILURE DESCRIPTION: 0055 MODIFICATION FOLLOW TECHNICAL BULLETIN
Reasonable cost for materials will be covered by Yanmar. Listed below is a materials list. Standard distance and travel rates apply.
ALL MATERIAL MUST MEET ABYC STANDARD
1. Marine grade 16 gauge wire. Length will vary. 2. Split wire conduit. Length will vary. 3. 1- Marine Heat Shrink Butt Connector. 4. 1- Marine Insulated Ring T erminal.
If you have any questions please contact Yanmar Customer Support at 855-416-7091.
Page 2 of 4
The improvement to oil pressure sender is done so by removing the existing oil pressure sender ground wire. This wire is the one marked B2001/1. This ground wire should be moved back and taped to the harness making note to completely cover the lead.
Connect a new 16 gauge wire to the oil pressure sender on the post of the previous ground marked B2001/1.
This new ground wire will be connected to the unused accessory ground marked “PADDLE WHEEL GND” as shown in the illustration on the next page
Page 3 of 4
The new ground wire will be connected to the unused accessory ground marked “PADDLE WHEEL GND”
Page 4 of 4

 

[captstu]

I took my R-25 (4BY2) into an authorized Yanmar dealer to have Advisory Number: YASA2014 performed.

They updated the software - no real change in operation - but never did the wiring change required in the advisory. They charged me about $250 for the advisory work -- and, I presumed billed Yanmar also.

What do I do? I've contacted Yanmar for advice on where to take the boat to have the work done - no answer. I've contacted the dealer several times - each time they acknowledge the work remains to be done, but don't do it.

Can I take it to another dealer and have the work done?

The boat runs fine, oil pressure is fine at low RPM ad when engine is cold - but fluctuates when engine is hot - from zero to maximum pressure. I've checked pressure with a mechanical gauge, it is within specifications at all RPM.

Thank you. /Stu

 

[knotflying]

Stu,
If you were capable enough to do the mechanical oil pressure check, you should have no problem doing the ground wire yourself and avoid agrivation. In my opinion you should have not been charged for this service.

 

[captstu]

I'm quite capable of rewiring the oil sender - the instructions are clear. But, I'm concerned about Yanmar objecting to anyt future repairs if I tinker with the wiring.

We'll see if they step up to the problem.

 

[Hydraulicjump]

Having survived this problem and gotten the fix (which worked just fine and continues to work just fine), I strongly urge you to keep after Yanmar on getting some help. You should NEVER have been charged for the work of the dealer. It should have been covered under the service bulletin. I suggest you do two things: 1) contact Yanmar and 2) report the dealer to them. I found that Yanmar gets real grumpy with their service dealers when they misbehave (they refused to work on my engine in San Francisco and Yanmar folks showed up to ask why).

And here is a guy at Yanmar who has proven to be responsive and a nice guy to boot (melifluous Georgia accent):

Michael Anglund
Customer Service Department Marine
Yanmar America Corporation
Tel: 855-416-7091
email: mangland@yanmar.com

hang in there. This can be fixed and once it is fixed (in my case they had to replace the harness and the ECU, not just the oil pressure sending device) it holds just fine. I have added 300 hours since the fix.

Good luck!

Jeff

reminder: there is only one part on a boat that works all the time.....the owner.

 

[captstu]

Jeff,

I will contact Yanmar as suggested. I did contact the distributor, Mastry Marine, and received no answer. I agree that dogging the problem is the correct solution - no idea why they charged me for the fix - I gave them a copy of the advisory but they didn't forward it to the mechanic - so he put in the hours ticket.

They did some other overpriced work and adjusted my bill by $900, but would not adjust this part or finish the work.

Hopefully Yanmar will do the fix.

Thank you.

 

[captstu]

Jeff,

Thank you for the advice, I contacted Michael Anglund as suggested, he referred me to Bob Jessip (727-522-9471) who referred me to still another Yanmar authorized service center. They sent a mechanic out, changed the wire as noted in the service advisory, and it worked fine -- for about 4 hours.

Now I have no oil pressure.

The mechanic came back, checked the connections, put it back the way it was, checked for proper voltages, checked for proper (and changing under load) resistance, and retreated to call Yanmar for help.

I'm sure it will eventually get resolved.

 

[Hydraulicjump]

Keep dogging this. They should have replaced the ECU AND the harness, then recalibrated the oil pressure. If they just replaced the oil sending device or the ground wire that goes to it, it likely won't work (didn't on mine). It may be that replacing both the harness and the ECU was overkill on my boat, but it did the trick and I have had no recurring problems.

By the way, I went through one unnamed Bay Area mechanic who, to be polite, just wasn't up to the task. I ended up hauling the boat to Stockton where I found a terrifically competent one who worked with the factory and solved this royal pain in the exhaust elbow.

It shouldn't have to be so darn hard to get this fixed, but it is, and the effort will eventually be worth it. Hang in there.