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Old 05-06-2014, 08:25 PM   #1
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FL 120 Smokes more after oil change.

So I changed my oil for the first time last week and it seems like it smokes a little bit more. Pretty good at changing oil. Used Delo 400 30WT and also did the Simms pump. It just seems like it smokes a bit more on startup. It is not horrible and goes way down after it heats up. Just wondering if there is some correlation.
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Old 05-06-2014, 08:36 PM   #2
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Greetings,
Mr. J. Could be a slight change in atmospheric conditions whereby there seemed to be more smoke. Unless further enlightened, I can't see that changing oil would change anything.
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Old 05-06-2014, 08:47 PM   #3
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Overfilled it? Did you put in a quantity or use the dipstick? Has your dipstick been re-marked? Tip the engine back like you do when you mount it in a boat and the oil level reads incorrectly. You will notice your engine will use some oil and then stop at some level it is happy at and won't use any more.
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Old 05-06-2014, 09:31 PM   #4
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The FL-120 takes 12 qts. The manual describes the remarking of the dip stick. My PO used 13 qts and thought he had problems because it burned a qt in 10 hrs.
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Old 05-06-2014, 10:08 PM   #5
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So I changed my oil for the first time last week and it seems like it smokes a little bit more.
Psychological on your part perhaps? Or slight over fill.

I wouldn't worry about it
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Old 05-06-2014, 11:12 PM   #6
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Mine did this too for a while. Seems fine now. I did use the correct volume and it does not come up to the Min line on the dipstick I have.
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Old 05-07-2014, 12:56 AM   #7
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I did put 14 quarts in it.... Ha ha, JK! I put 12 and the dipstick was "re-marked" so that was cool. Ok, I'll just keep an eye on it.

BTW, went to pump out today and the wind was up when I was coming back. I seriously "drove" this boat into the slip. Single screw with no thrusters. I saw it was now or never and put the heat on it. Slid right in. The wife was seriously laughing at that maneuver. She asked me how I knew to do that. I of course lied! Chicks dig good drivers...and lucky ones!
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Old 05-07-2014, 02:24 AM   #8
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14 quarts is too much. You can blow a main seal (steady Firefly!) and get a lot of blow by as the crank will be splashing it about a lot - I recommend taking some out. Burning a lot of oil with the breather is not good. Next time, get it all out and measure the correct amount and remark the dipstick.
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Old 05-07-2014, 07:20 AM   #9
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You will never get all the old oil out, especially if you're sucking it out through the dipstick tube so putting "X" quarts in will overfill the engine. Too much oil can cause problems in an engine. Fill it to the level marked on the dipstick unless you have a good reason to believe the dipstick is incorrectly marked.
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Old 05-07-2014, 08:22 AM   #10
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Is straight 30 weight the rec. oil for a Lehman. I use 30w in my DDs, not because I like it but because they will burn a lot of multivis. If I could use 15w40 I certainly would. I cant imagine why anyone would voluntarily use 30w if its not required.
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Old 05-07-2014, 08:32 AM   #11
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I agree with kulas44,,, strait 30 is not a diesel wait oil. 15w40 is the best wait oil for all diesels.
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Old 05-07-2014, 09:02 AM   #12
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I used 40w oil in Lehmans for years and years. As I recall 30w or 40w was what was called for in the old Leman owners manuals. And straight weight oils most certainly can be diesel oils.

Shell Rotella® Products - Shell Rotella

It's the way the oils are formulated not their weight that determines whether they are diesel rated or not.

These days most diesels call for 15-40w and running that in a Lehman is not going to hurt anything. But there is no reason not to run a straight weight either.
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Old 05-07-2014, 09:16 AM   #13
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Greetings,
As per the Lehman manual, straight 30 weight is the oil to use. Straight 40 weight in some cases.
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Old 05-07-2014, 11:22 AM   #14
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Sure would be nice to have a newer engine so you wouldn't need to guess how much oil to put in.

If you don't have a turbo and warm your engine up straight wt oil is better. Why have something in your oil that you don't need and displaces oil that you DO need. Multi-vis is for cars and trucks.
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Old 05-07-2014, 01:10 PM   #15
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Bob Smith said they screwed up the dipsticks. Remember the Lehman was a combine motor and when they marinized them and tilted them in boats the dipstick is marked wrong. You get virtually all the old oil out if you use a drill pump and the difference is immaterial. Fill it with fresh oil (I used 30 wt Delo) as per the manual, remembering that these old Fords were made in the dark ages when oil was oil and live pampered lives, so measure the oil and use the dipstick as a comparison measure, or go crazy and re-mark it. Don't forget the Simms pump, EVERY 50 hours with the same oil. A Lehman in a genset will go 30,000 hours or more, although I can't imagine owning one and changing the Simms oil every 50... Gawd.
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Old 05-07-2014, 03:25 PM   #16
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Greetings,
Mr. X. Bob Smith told me the 50 hrs oil change on the Simms pump was a misprint in the manual and the interval was 100 hrs. Annapolis Trawler Fest I think.
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Old 05-07-2014, 04:07 PM   #17
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Is straight 30 weight the rec. oil for a Lehman. I use 30w in my DDs, not because I like it but because they will burn a lot of multivis. If I could use 15w40 I certainly would. I cant imagine why anyone would voluntarily use 30w if its not required.

Most older engines were BUILT for single weight oil , the multi weight is to give a tiny better fuel burn , as the rings have to work less in scraping it down.

DIESEL OIL is defined by its additive package , not by its weight.
In some, 40% of the oil will be chemicals to improve dirt carrying , avoid rust or to neutralize acid in the blow by.

Every can of oil will have a code , look for it , learn what it means , and use what the engine builder thought was proper when the engine was built..

On older DD 2 strokes they started with 30 wt and soon learned the engines lived far longer with 40 wt.
DD requires CFII oil only,, most 4 strokes can use any DIESEL oil that will be on the shelves today.


Most if the oil improvements were forced by the EGR choking the engine with dirty exhaust .

Thanks EPA,
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Old 05-07-2014, 06:49 PM   #18
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Monograde oils have better lubricity, hence why they are used in DDs which load load the big end bearing for every revolution rather than every 2 revs. Multigrades retain more constant viscosity over the temperature range allowing for better lubrication in cold engines.
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Old 05-07-2014, 07:11 PM   #19
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Quote:
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So I changed my oil for the first time last week and it seems like it smokes a little bit more. Pretty good at changing oil. Used Delo 400 30WT
If a new boat to you, what oil was in it before? When was the oil last changed?

For an old diesel, it is not uncommon that a lighter weight or different brand oil than previous can lead to some "smoke" that wasn't there previously.

Or maybe the PO knew it was a smoker and used 50 weight, just guessing lacking facts of course.
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Old 05-07-2014, 07:40 PM   #20
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I was told, by an OLD dd mech. (hard to find these days) that the polymers used in multivis oil get broken by the rings sliding past the intake slots in DDs and the oil gets less ("cohesive" ?) causing it to loose its "adhesiveness" and get past the rings. I know from personall experience on numerous occasions on lets of DD engines in industrial (oilfield) applications that multivis oil is a no no for DDs. No other engine has this design, therefor multivis should be much better than straight weight oil. Can anyone on this list define what multi viscosity oil is and how it is rated ?
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