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Old 01-09-2021, 11:49 PM   #21
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This year I Replaced a 40 year old Onan 7.5 MDJE which was probably the best and simplest Onan made. I put in a NL 9kw. Put 875 hours on it since March. Absolutely fantastic! Hasn't skipped a beat and easy to maintain.
Another good endorsement. Will probably go with the NL I will need to figure out size. Whether to go with a 6 or a 9.
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Old 01-10-2021, 10:09 PM   #22
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+1 for Northern Lights in an enclosure. The gold standard in my mind. I have a 9kw.
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Old 01-11-2021, 06:39 AM   #23
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Back in 2008, Victron did a comprehensive generator test.

https://www.victronenergy.com/upload...7-jan-2008.pdf
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Old 01-11-2021, 08:18 AM   #24
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Back in 2008, Victron did a comprehensive generator test.

https://www.victronenergy.com/upload...7-jan-2008.pdf
Interesting. Looks like that study was for households. The NL came out of the study much quieter than the others. The lower RpM models were quieter, and with the additional hours of total run time anticipated does reinforce comments from others above. These are the 50hz models common in Europe. I don’t imagine there would be much difference in the 60 Hz models here.

Thanks for passing along!
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Old 01-11-2021, 11:08 AM   #25
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I've had Northern Lights on two boats. An 8kw and a 16 kw. I replaced a start switch once and an impeller once. Hundreds of hours on them, combined. Powerful, quiet, easy to maintain. Hard to beat. Others brands are good, too. Onan, Kohler. My friend's Kohler starts easily and powers everything on his boat, including six a/c units. Never had any trouble with it except an impeller when it sucked up some mud (longer story).
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Old 01-11-2021, 11:29 AM   #26
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I've had Northern Lights on two boats. An 8kw and a 16 kw. I replaced a start switch once and an impeller once. Hundreds of hours on them, combined. Powerful, quiet, easy to maintain. Hard to beat. Others brands are good, too. Onan, Kohler. My friend's Kohler starts easily and powers everything on his boat, including six a/c units. Never had any trouble with it except an impeller when it sucked up some mud (longer story).
As I mentioned, my previous generator was a 7.3 KW Kohler. I think though, that based upon the discussions here that I will go with a Northern Lights.
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Old 01-11-2021, 11:49 AM   #27
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I like Northern Lights or Westerbeke. 1800 rpm and sound enclosures are a must. Generator size is easy; same size as shore power. Most 40 footers about 60 amps or 8KW.
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Old 01-15-2021, 02:05 PM   #28
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Phasor Generator

I replaced an aging 9KW Kohler with a 4.5kw Phasor genset, Kubota powered. Wonderful unit, powers all I need, relatively quit at 1800 rpm operation. Agree with comments about avoiding high rpm units.
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Old 01-15-2021, 02:25 PM   #29
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Take a look at the Fischer Panda Marine AC 5000. If you're a 50 amp boat this will handle the job. https://www.passagemaker.com/technic...-for-your-boat
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Old 01-15-2021, 02:41 PM   #30
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Westerbeke

We have a 14KW Westerbeke with about 1200 hours on it. Living in the South we use it in the hook in the summer to keep the AC cold and the fridge colder. I basically keep the belt in good shape, fresh impellers, oil and clean fuel. I like everything about it except the sound box. Too hard to reach the dipstick and oil fill. Such is life.
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Old 01-15-2021, 02:47 PM   #31
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i have to take exception to the post about high rpm gensets not being up to the task. we have 2 boats. one has an entec (farryman diesel) 1900 hrs and the other is a nextgen 3.5 1100 hrs. we anchor out 90% of the time so we're using the gensets a lot. both units can power all electrics pretty much simultaneously using common sense power management. both have provided solid service with no major problems, one for 17 yrs the other 10. when i have had to talk to manufacturers they both have been great.
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Old 01-15-2021, 05:01 PM   #32
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We took a 5kW NL around the world 1995-1998. We put about 3,000 hours on it and it ran flawlessly, so when it came to buying new generators for Fintry in 2003 to replace her existing 220VDC pair, I chose a pair of 9kW NL with 24VDC operation.


IIRC the 9kW was new at the time. We went through half a dozen belts, supplied by NL, in the first 100 hours. Then, at 300, and 500 hours we lost the fuel solenoids in the two units. I sent a photo of the nameplate from one of the solenoids to the solenoid manufacturer, who told me that they were 12V units. Well made, I guess, to last several hundred hours at 24V.


My guess is that the generators were originally built as 12V units and were converted to 24V for us. I would have assumed that there was a BoM and maybe even a kit for doing the conversion, but somehow the fuel solenoids were overlooked. It took NL 4 months to admit their mistake and refund my cost for the new solenoids.



We replaced one of them with a 12kW NL when we installed a Quick gyro in 2019. It had about 2,100 hours on it when we took it out. The other one is still going strong, with about 2,300 hours, as is the 12. So, except for the belts and solenoids, our experience with NL has been excellent.



An NL generator would be my choice the next time I have to choose. As it happens, we have made an offer on a boat that has an 8kW NL and a Lugger main engine and I couldn't be happier.


With that said, I think you'll probably be all right with any of the 1800 rpm units, but if you expect to put thousands of hours on your generator, I'd pick NL.


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Old 01-15-2021, 05:15 PM   #33
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I can't compare to other brands, but had an Onan EQd on my last boat and liked it -- quiet, reliable and easy. So, when I spec'd this boat, which has Cummins mains, I went with a pair of Cummins/Onan EQD (17 or 18 kw, as I recall). They each have about 1800 hours, completely trouble free. I should also mention that they are quiet. If the boat isn't plugged in to shore power the generator is on, 24/7.
Really have to strain to hear it, even in the middle of the night in a quiet anchorage. In fact, after returning to my dock and plugging back in to shore power, more than once I have left the boat without realizing that I had not shut down the genset.
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Old 01-15-2021, 05:16 PM   #34
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Generators

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Would like to get thoughts and opinions on different brands of diesel generators from those with experience with them.

What diesel generator do you think is the highest quality, and why do you think it is?

What maintenance issues have you dealt with, with yours? Brand, Age/hours is a factor here, so it may help to state that?

For those who have had warranty service, how satisfied with the service from the brand are you?

What has the support been like from the brand you use?

Thanks for any help that can be offered.
I have a 9kw Isuzu. 2000 hrs on it. Works like a champ but it's loud. No issues so far other than annual maintenance.
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Old 01-15-2021, 06:19 PM   #35
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I worked in a boat yard once upon a time, general wrench monkey, and put an automatic start on an Onan eqd. I remember being really impressed with the unit. Which is a funny contrast to the old ball of rust (Onan) in our mainship. That Onan always was hard to start, wanting for repairs, and noisy. It was almost 40 years old though....
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Old 01-15-2021, 06:55 PM   #36
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Our 7Kw Onan EQD,fitted to an 05 boat, came with just 135 recorded hours(mains were 700hrs). It starts well, runs quietly,churns out amps. Big improvement on the MDKD 6.5 in the previous boat. In Australia, Onan(Cummins) tends to be the most common brand.
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Old 01-15-2021, 08:36 PM   #37
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I love diesel gensets but they are old technology. Why not consider an EFOY? Basically a fuel cell. Much cheaper, simpler and so quiet.


https://www.efoy-pro.com
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Old 01-15-2021, 09:12 PM   #38
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Our 7Kw Onan EQD,fitted to an 05 boat, came with just 135 recorded hours(mains were 700hrs). It starts well, runs quietly,churns out amps. Big improvement on the MDKD 6.5 in the previous boat. In Australia, Onan(Cummins) tends to be the most common brand.
Love australia. Sidney is great. Traveled the world and never met anyone as nice and fun to be with. Was there in the late nineties on business.
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Old 01-15-2021, 09:48 PM   #39
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I love diesel gensets but they are old technology. Why not consider an EFOY? Basically a fuel cell. Much cheaper, simpler and so quiet.


https://www.efoy-pro.com
Looking at the Efoy products, I would question how much power they provide. Maybe the larger one. I also saw some complaints about availability of fuel. Not sure if that is an issue or not. Finally, I didn’t see any pricing info anywhere. Any idea how much those cost?
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Old 01-15-2021, 10:08 PM   #40
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Currently have two NL gensets. 12kw is the workhorse and used extensively for AC and other power needs, it has 7800 hours and only needs the normal oil and filter changes and clean fuel. Not much more needed. The 20kw operates the hydraulic pump for the windlass and bow thruster, so mainly sees short periods of service for those needs, and occasional use for electrical requirements.. It has 2500h or so on it. Both are equipped with water separators so are pretty quiet at anchor. In the past I had a 3.5kw NextGen on a smaller boat. It was newly installed when I bought the boat due to they replaced the original one due to warped head (so I was told). This genset operates at higher rpm, 2700 or so, and unfortunately I had several issues with it. Failed oil pressure switch, it ate several RW impellers, and I had a failed RW hose that was really difficult to get to to replace (probably not the generators fault). As a result I found the generator wasn't available when I needed it as the failures occurred while I was on multi day trips with minimal access to parts and service. But for the boat I had this genset fit the space I had available. And the NextGen service was excellent, and I had easy access to a technical person to help me. For the bigger boat, the NL have basically been flawless.
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