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Old 10-28-2015, 05:07 PM   #1
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BMW diesel

What are the thoughts on the BMW D150 6 cyl 135 hp diesel?

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Old 10-28-2015, 06:03 PM   #2
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nice engine....... for a car
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Old 10-29-2015, 07:18 AM   #3
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Car or taxi engines are OK , tho marinizing parts replacement may be iffy.

Use the rule of thumb , no more than 1 hp taken for every 3 cubic inches of displacement , at cruise , and it will last OK.
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Old 10-29-2015, 08:22 AM   #4
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I thinks some of the BMW diesels are badged under the Yanmar label.
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Old 10-29-2015, 09:04 PM   #5
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I wouldn't touch them.

I know that's a strong opinion but it was formed many years ago when BMW put out a whole lot of stern drive and engine packages and then walked away leaving a whole lot of folk with a darn mess when it came to any service.

When the mess they made became untenable for the boat owner the option was literally junk the boat or pay for a swap to the Volvo Penta engine and stern drive.

If they tried to sell the boat with the BMW they took a complete bath.

The boats actually were a nice boat so the swap was done for many.

But I would not touch a BMW for a boat for any reason.
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Old 10-29-2015, 09:16 PM   #6
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Was told Fiat are a better engine than BMW
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Old 10-29-2015, 10:26 PM   #7
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Begining to sound like a witch hunt.

C lectric is always informative and every time I see his avatar something worthwhile is attached. Can't say anything for the other posts.
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Old 10-29-2015, 10:29 PM   #8
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BMW diesel

The only place I know to get parts for them is www.bmwmarine.com, V12 Engineering. I donated my old BMW D50-2 to them, so to keep others alive. They got it for free and they paid the shipping.
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Old 10-29-2015, 11:05 PM   #9
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When the mess they made became untenable for the boat owner the option was literally junk the boat or pay for a swap to the Volvo Penta engine and stern drive.
I think a dead BMW compared to a new Volvo Penta would be about equal??
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Old 10-29-2015, 11:28 PM   #10
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I can't speak to current BMW Marine diesels but I sure can back up what C lectric said.

I had 2 pairs of the gas BMW's in the 80's. A pair of 180's that failed and I replaced with a pair of 220's.

They did a marvelous job of marketing and at the time, a local builder was offering them as an option. I think there were 7 of us who went for the 180's.

They were awesome packages coupled with the BMW Z-Drives. Quietest, smoothest engines I ever ran and easy to work on as far as regular maintenance. The legs and shifting were also smooth and a joy to use.

So,what happened?
As I recall, sometime around the 300 or 400 hour mark, the OH cams distorted enough to slam a valve into the top of a piston. About the same time, prop shaft seals started to fail and we had strawberry shakes in our out drives.

BMW did a ton of warrantee work on them, but only after they could no longer blame operator abuse. Mine was one of the catastrophes. They blamed a bad batch of cams and assured everyone all was well. They replaced one of my engines under warrantee.The second one was beyond just a new cam so they agreed to settle on it as well. I opted to pay the difference and upgraded to 220's.

There was one other failure ahead of me and the rest were about to crash as well and this was a tiny market. Everybody got at least new cams and prop shafts.

When the second batch of cams and prop seals started failing, they had no excuses other than "maybe they could not withstand the constant high revs." and we should all just slow down.???

By this time Merc had taken over and they would not do anything for anyone. Some folks repowered and some of us just took the bath.

One of the biggest problems was lack of BMW marine techs and nobody else would touch them. I would be suspect of that now as well, especially away from major centers.

It was a long time ago and they were gas I/O but I would not go anywhere near them again.
Ever!
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Old 10-30-2015, 06:03 AM   #11
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They were standard engines in Lord Nelson Victory Tugs for a while. Search their user group on Yahoo.
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Old 10-30-2015, 07:25 AM   #12
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Car marinizations in boats , just highlights the boat assemblers desire for CHEAP!
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Old 10-30-2015, 09:41 AM   #13
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Car marinizations in boats , just highlights the boat assemblers desire for CHEAP!
If you want to marinize a BMW, how long does it have to marinate?
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Old 10-30-2015, 09:52 AM   #14
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Engines designed for cars don't belong in boats IMO. Cars run low load most of the time.
Bus, truck, earthmovers all have one thing in common, frequent heavy loads, again and again. Engines developed for those markets have worked well in boats provided the marinization was properly done and they were not hopped up beyond all recognition.


A wide spread and experienced dealer and repair network is a requirement.
I will stick to major heavy duty makers in order to not be a pioneer.
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Old 10-30-2015, 10:01 AM   #15
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Car marinizations in boats , just highlights the boat assemblers desire for CHEAP!
My BMW engine was actually a marinization of a Hatz industrial diesel engine common in compressors. Doubt it was cheap.

I think they got into a market that didn't really match where the company was going. This was the early 80s, the era of the e21 and e30 car platforms, and skyrocketing sales.
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Old 10-30-2015, 10:09 AM   #16
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My BMW engine was actually a marinization of a Hatz industrial diesel engine common in compressors.
Many Haatz engines are good engines, but for some reason, they won't sell to American Markets... Perhaps that was the cause?

They have a very good 3-phase 50hz small genset but no 60hz / single phase options and absolutely no desire to market into the US.
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Old 10-30-2015, 10:16 AM   #17
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I watched a couple of YouTube videos of the BMW D50 running and felt strangely nostalgic for it's unique sound, and briefly regretted repowering.
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Old 10-30-2015, 10:39 AM   #18
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Many Haatz engines are good engines, but for some reason, they won't sell to American Markets... Perhaps that was the cause?

They have a very good 3-phase 50hz small genset but no 60hz / single phase options and absolutely no desire to market into the US.

Building the support network required for proper entry into a new market is an expensive major decision for any company.
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Old 09-22-2016, 08:33 AM   #19
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The BMW 6cyl diesels of the 1980's were made by VM motors in Italy , one of the largest diesel engine makers in the world. Now making very highly rated diesels for The american pickup truck market, the ram Eco-diesel.
Their latest marine engines have been designed with almost no external hoses to reduce leaking from hose failure issues.What a good idea! Proper designing not just maranizing.
VM motors got bought and sold again and again , see wiki.
BMW got out of the marine diesel Market and sold the 6 cyl to mercruiser who marketed it in the early 1990's . But they gave up when sales were not what they wanted.
The basic engines are great, maranization is always the issue, and the parts availability of older engine a real problem, same with most older engines.

I would be interested in anybody experience with the mercruiser 180hp turbo engine of the early 1990's , I'm looking at a boat with one of these engines but worry about parts a lot! Let alone finding somebody to work on it.
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Old 09-22-2016, 11:42 AM   #20
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One day you will be putting your boat on the market and if you have an unusual engine or an unusual boat, you will be waiting a long time for a buyer to come along and he will be sure to offer far ess than you were hopeing to get. The internet has made it easy for everyone to quickly learn about the pros and cons of everything that there are no uninformed buyers out thre anymore. I would recommend searching for a good deal on a well maintained mainstream boat in order to prevent you from doing this in the future.
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