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Old 05-08-2014, 06:36 PM   #41
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There is nothing as satisfying as an oil thread. Personally I use Yak oil whenever I can. Not too many places sell it anymore due to the difficulties in refining it. Available in multiple viscosity depending on the time of year it's harvested...

how many yaks do you have milk to get 12 qts of oil?
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Old 05-08-2014, 06:46 PM   #42
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eh,
I'd guess 10 - 30 but perhaps just 30 would be best.
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Old 05-08-2014, 08:20 PM   #43
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Well there's the rub. MY Lehman manual dated June 1986 lists only single weight oils and it also states the 50 hour oil change interval on the Simms pump. See table copied from the manual below.
Interesting. My Manual is 1978. Did Lehman rethink the issue? I suppose we could interrogate Brian Smith about it, but I`m staying with MV, I`d have trouble finding hi spec single weight here.
My Manual also says 50 hours for the injection pump too.
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Old 05-08-2014, 11:26 PM   #44
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I know there are different opinions and I respect everyone's. As a complete newbie to diesel motors and several things trawler I am really learning a lot on this forum. I research just about everything. The two areas that seem to get the strongest opinions are oil and anchors. When the discussion gets to bourbon or wine, or wives or girlfriends, I will post my opinions. Until then I really appreciate all of the opinions and information.

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Old 05-09-2014, 12:49 AM   #45
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A picture of the paragraph in one of my Lehman 120 manuals, specifying a 200-hour oil change period in the Simms pump.
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Old 05-09-2014, 12:50 AM   #46
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Mr. Bear,

Pappy van Winkle....?
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Old 05-09-2014, 07:55 AM   #47
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A picture of the paragraph in one of my Lehman 120 manuals, specifying a 200-hour oil change period in the Simms pump.
What is the date of the manual? Just curious.

All the above said, when someone has an engine failure where the root cause can be determined to be because the incorrect weight of oil was used, please post it.
Thanks!
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Old 05-09-2014, 09:49 AM   #48
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I know there are different opinions and I respect everyone's. As a complete newbie to diesel motors and several things trawler I am really learning a lot on this forum. I research just about everything. The two areas that seem to get the strongest opinions are oil and anchors. When the discussion gets to bourbon or wine, or wives or girlfriends, I will post my opinions. Until then I really appreciate all of the opinions and information.

Jeff

I've learned an enormous amount from this Forum too. But maybe the greatest lesson was one I had to figure out myself - we sometimes worry way too much about things that just aren't going to make all that much difference.
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Old 05-09-2014, 10:39 AM   #49
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Lurker,
I talk about oil, anchors and hull forms because I think those things are interesting. Hardly anybodies "worried" about the choices. Like philosophy. Not for worry. Just interesting matter to talk about.

Two other things that enter into the multi-vis question:

1. Over 95% of the current engines going into trawlers have turbocharged engines and will probably require MV oil

2. They make straight wt oil presumably for engine applications that don't require MV. The Alaska state ferries are powered by big enterprise diesels and I'll bet they use straight wt oil.

Other than the fact that some manual says so why on earth would one want or need to change the Simms pump oil more often than every 200 hrs? Does the fuel contaminate the pump lube oil? That would pop the question of how often do the pumps fail. Why did they design the engine w a separate oil supply in the first place? Also for later engines that use engine lube oil the fuel leaking into the lube oil would be a problem for the engine itself. And that would apply to most engines old and newer. Haven't heard a lot about fuel contamination in diesel engines.
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Old 05-09-2014, 10:55 AM   #50
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Lurker,
I talk about oil, anchors and hull forms because I think those things are interesting. Hardly anybodies "worried" about the choices. Like philosophy. Not for worry. Just interesting matter to talk about.

Eric:

My remark was aimed at newbies who do worry about such things. At least I did when first getting into the game and it seems other newbies may also.

But I fully understand the interest of the more experienced to ponder on the philosophy of choice of viscosity, anchor types, single vs. twins, etc. Give me an adult beverage or two and an audience and you can't shut me up on topics of interest to me!

My comments were just a heads-up to newbies to not get too wrapped up in the finer points at this stage of the learning process.
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Old 05-09-2014, 11:06 AM   #51
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how many yaks do you have milk to get 12 qts of oil?
You don't milk them, you boil them.
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Old 05-09-2014, 11:51 AM   #52
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Luker,
Yes. And something that should be said. We need to talk in a language that most everybody understands and many aren't prone to belly up to the bar and say "wa dat fo".
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Old 05-09-2014, 05:23 PM   #53
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You don't milk them, you boil them.
The best yak oil is cold pressed.
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Old 05-09-2014, 05:41 PM   #54
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You don't milk them, you boil them.
glad to hear that,as that seems to be a male yak
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Old 05-09-2014, 10:56 PM   #55
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what is the date of the manual? Just curious.

All the above said, when someone has an engine failure where the root cause can be determined to be because the incorrect weight of oil was used, please post it.
Thanks!
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Old 05-09-2014, 11:04 PM   #56
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We could have a date and hours graph depicting changes in specs for changing the injector pump oil, and still not resolve it.
We`d be better off asking the yak.
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Old 05-09-2014, 11:51 PM   #57
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I had the exact same problem once when I couldn't get my usual Rotella 30wgt. I put in 40wgt Pennzoil and it smoked like Edward R. Murrow. When I got home and changed back to Rotella, the clouds receded and the sun came out.

The original PO used Sears 30wgt. for the first 15 years so apparently anything can be used. I would have continued but Sears no longer sells it's own brand of motor oil.
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Old 05-10-2014, 04:12 PM   #58
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I had the exact same problem once when I couldn't get my usual Rotella 30wgt. I put in 40wgt Pennzoil and it smoked like Edward R. Murrow. When I got home and changed back to Rotella, the clouds receded and the sun came out.

The original PO used Sears 30wgt. for the first 15 years so apparently anything can be used. I would have continued but Sears no longer sells it's own brand of motor oil.
I remember when Sears had it's own brand of motor oil and they would even sell it in bulk (bring your own container).

I never did see a Sears oil well or refinery though.
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Old 05-10-2014, 04:18 PM   #59
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........... Better to find information about engineering (like oils) from an engineering source, not a mechanic. A mechanic's job and expertise is to troubleshoot, repair and or replace defective components. They are not scientists or engineers. They are a great source of what they think including old wives tales...........
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