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Old 01-10-2013, 04:03 PM   #41
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The FL120 operators and parts manuals are also available online from various sites. The Grand Banks owners site has them in PDF form in the "manuals" section. I believe you have to be a member to access the manuals section but the GB forum is free to join.
I have mine posted here:

Index of /CHB
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Old 01-10-2013, 05:01 PM   #42
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Many thanks !!

Subscribed to the GB Forum and sure enough -- manuals galore ...enough reading for a year!!!!! ...... learning continues ... much appreciated john
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Old 01-10-2013, 09:54 PM   #43
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1980 Ford Lehman, 120 horse, 6 cly. diesel engine. Low hours maybe 2000 hours.
She smokes blue grey out the exhaust. When we drained the oil out of the fuel injector pump their was diesel in it??? Some neighbor say that it could be coming from the valve galley under the valve cover???
Any help would be great.
Kurt
Do Ford Lehmans smoke when started up in the winter?

Do bears $hit in the woods?

Diesel is still oil. Just replace it with the same as in the crankcase when you change the oil. And don't strip the level plug.
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Old 01-11-2013, 06:35 AM   #44
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Absolutely...........I put extension tubing on the coolant overflow pipe that comes out of the neck of the header tank on each engine and fed it into a cleaned out quart oil bottle that sits in each engine's drip pan. As the coolant heats up the excess is blown out of the tank and down into the bottle. When I do my engine room check before the next day's startup (or whenever the next cold startup is) it's a simple matter to pour the coolant from the quart bottle back into the header.
Hey, Marin, that sounds a bit like something out of "Catch 22" . Remember the guy with a catheter at one end, and drip in the other, and the nurse just swapping the bottles as one emptied and the other filled. You must have read it. If not, I suggest you do....
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Old 03-27-2021, 01:16 PM   #45
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Hello everyone, FL 120s looking at a boat for sale when start up smokes on the sea trail it smokes not as much coming back but I noticed when the engines were started there was a lot of fuel coming out of the exhaust on top of the water, and also at the end of the sea trail, brought the boat back there was a lot of blue purple oily fuel on top of the water was wondering if this is a big concern or a big problem any help would be appreciated These engines are in a 1979 Ocean Alexander
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Old 03-27-2021, 01:49 PM   #46
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Hello everyone, FL 120s looking at a boat for sale when start up smokes on the sea trail it smokes not as much coming back but I noticed when the engines were started there was a lot of fuel coming out of the exhaust on top of the water, and also at the end of the sea trail, brought the boat back there was a lot of blue purple oily fuel on top of the water was wondering if this is a big concern or a big problem any help would be appreciated These engines are in a 1979 Ocean Alexander
Lehman's smoke but shouldn't be pouring fuel out. A sign of incomplete combustion. Could be simple like valve adjustment or expensive like new injectors or very expensive like new rings. How do you know it's fuel and not oil? What are hours on engine?

You need a good mechanic to figure out what is wrong and cost to repair. Every boat has a price.
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Old 03-27-2021, 02:01 PM   #47
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Mine when cold still puts out a slick, right after new injectors and valve adjustment. Has been doing it for 4000 hours since it was a drop in rebuild.
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Old 03-27-2021, 02:03 PM   #48
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Hello, i’m not really sure it’s fuel, but with the engines off I can smell diesel at the back of the boat even before the engines are started, the engines had over 7000 hours on them two years ago the injectors were all replaced, The boat has been sitting for several years and the diesel in the boat could be at least five years old, thanks for your help by the way I appreciate it
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Old 03-27-2021, 02:46 PM   #49
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Suppose one cylinder does not have full compression when cold. The injector still spits fuel. The engine cranks, starts and raw fuel is sent out the exhaust before that cylinder starts to fire.
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Old 03-27-2021, 05:40 PM   #50
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Hello, i’m not really sure it’s fuel, but with the engines off I can smell diesel at the back of the boat even before the engines are started, the engines had over 7000 hours on them two years ago the injectors were all replaced, The boat has been sitting for several years and the diesel in the boat could be at least five years old, thanks for your help by the way I appreciate it
I would start with adjusting the valve lash. A simple job but you don't own the boat. I would also do a compression check. Another simple job but you don't own the boat. An experienced diesel mechanic would be your best source of info.

7000 hours is high but not a red flag if you have maintenance logs showing oil was changed regularly.

A boat sitting for several years might benefit from a long run at WOT under load. Dump some sta-bil and bio-bor in the tanks. A Racor 500 filter should get rid of any water if present.
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Old 03-27-2021, 06:14 PM   #51
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Even with clean fuel, new injectors, properly adjusted valves and anything but a hot engine....Lehman's are notorious for a wisp of smoke and a sheen on the water.

Remember the design age of these diesels....even perfect they met none of today's standards for efficiency or pollution control.
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Old 03-27-2021, 07:20 PM   #52
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If the boat is otherwise acceptable, agree a price and move to survey, starting with the mechanical surveyor. Be prepared to spend some money and walk if the survey is bad. You may need to negotiate permission for more invasive than usual mechanical surveying.
At 7000 hours there are multiple potential causes. Unburnt fuel in the exhaust is a Lehman characteristic but yours sounds excessive, like smelling diesel at the transom even before the engines are fired up. It may help point the way for the surveyor.
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Old 03-27-2021, 08:49 PM   #53
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Thanks everyone for your help trying to figure this out we appreciate it
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Old 03-27-2021, 08:58 PM   #54
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Quote:
Originally Posted by psneeld View Post
Even with clean fuel, new injectors, properly adjusted valves and anything but a hot engine....Lehman's are notorious for a wisp of smoke and a sheen on the water.

Remember the design age of these diesels....even perfect they met none of today's standards for efficiency or pollution control.
Yup, mine did this even right after all the valve lash and and new injectors. Heck, I had one of my 120s completely rebuilt including boring the cylinders and all new pistons, etc. I had its injector pump rebuilt too. Smoked just like its several thousand hour brother across the center aisle of the engine room! That fuel sheen on the water at idle is normal.
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Old 03-27-2021, 11:55 PM   #55
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They all do it, to a degree. New injectors help a bit but the Lehman marks its territory when cold. Messy but it is what it is.
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Old 03-28-2021, 05:31 AM   #56
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Originally Posted by psneeld View Post
Even with clean fuel, new injectors, properly adjusted valves and anything but a hot engine....Lehman's are notorious for a wisp of smoke and a sheen on the water.

Remember the design age of these diesels....even perfect they met none of today's standards for efficiency or pollution control.
Agree. A sheen at low speeds / idle is completely normal with most mechanical diesels. The smoke if white is just diesel with incomplete combustion.
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Old 03-28-2021, 05:36 PM   #57
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What color is the smoke? White smoke oil black smoke unburned diesel.
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Old 05-27-2021, 07:09 PM   #58
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Meridian
ISO (metric)bolt sizes are the world's most commonly used, so you should be able to find one out there somewhere.
M8 is an 8 millimeter (just over 5/16" inch) with a 60 degree angled thread (same as UNC), but the ISO thread is slightly finer than UNC on most sizes.
20.32 threads/inch on M8 vs 18 threads per inch on a 5/16" UNC, so they are not interchangable.
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So the bolt thread on the drain plug in the mimmec pump is 8mm and the thread count is 20.

Would love confirmation from the folks who know
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Old 05-27-2021, 07:30 PM   #59
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So the bolt thread on the drain plug in the mimmec pump is 8mm and the thread count is 20.

Would love confirmation from the folks who know
*if* itís metric, and I donít know that it is, itís not measured that way. Metric bolt threads are measured by pitch, not count. An M8 bolt for example may have a thread PITCH of 1mm or 1.25mm.

Ken
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Old 05-27-2021, 09:14 PM   #60
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[QUOTE=kchace;1007784]*if* itís metric, and I donít know that it is, itís not measured that way. Metric bolt threads are measured by pitch, not count. An M8 bolt for example may have a thread PITCH of 1mm or 1.25mm.

Ok. Understood. I was seeing t numbers when i was searching the webs.

I may just pull it and go to home depot. Lol.

Ill report back though
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