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Old 12-22-2016, 07:36 AM   #21
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1800 4kw Kohler with Yanmar 2gm engine--approx. 500 hours.
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Old 12-22-2016, 08:07 AM   #22
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Installed a 1800 rpm, 2 cylinder, yanmar driven generator in last spring made by Alpha, a small outfit out of Pompano Beach, FL. Less than 100 hours so far. No sound shield and it does vibrate more than a 3 cylinder but it fits the space, is easy to service and appears to be well constructed. It was a new, self install and the company owner's communication was supportive and prompt. The boat and bill's both belong to my father but it was about $7.5k including all supporting systems (fuel system, thru hulls, hoses, electrical) which is a bargain.
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Old 12-22-2016, 08:58 AM   #23
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Northern Lights, 8K, 1800rpm, 3cyl, 450hrs.
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Old 12-22-2016, 09:52 AM   #24
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Wow, only three have responded with significant hours on their generators. Argues against worrying about whether a 3,600 rpm or 1,800 rpm is the better fit for most boats.
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Old 12-22-2016, 11:36 AM   #25
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Westerbeke 15KW, 1500rpm, ~1800 hours
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Old 12-22-2016, 11:53 AM   #26
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Westerbeke 15KW, 1500rpm, ~1800 hours
It is probably 1800 rpm to provide 60hz unless your boat is wired for 50hz.
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Old 12-22-2016, 11:56 AM   #27
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Westerbeke 4.4 kw (2 cylinder) 1800 rpm, approx. 2400 hours
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Old 12-22-2016, 12:50 PM   #28
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1800 westerbeke 8 BTD 2175 hrs. Approximately 1987 set. Recently pronounced doa with 265-275 psi compression in all three cyl. 50 psi below rebuild spec. Nothing but trouble for me in last 3 years. Gen end was rebuilt in 2013 with less than 100 hrs. Fairly quiet and smooth without enclosure when it ran. Not going WB again. Probably will part-out.
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Old 12-22-2016, 12:55 PM   #29
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Kohler 8 KW, 1800 RPM, 413 hours. 2003 boat and I've put more hours on it in two years than the two previous owners combined.
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Old 12-22-2016, 01:27 PM   #30
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2-14kw @1800 came with the boat. An Onan MDL3 and Perkins 4108. Both with glazed cylinders from light running. Perkins was no problem to overhaul, but Onan wants to sell a new one. I no longer have an electric stove, so planning on dumping the Onan for a much smaller generator. I will never have another Onan/Cummings product because of parts issues.
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Old 12-22-2016, 01:37 PM   #31
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Hi,
3 cylinder, 1800 rpm, Yanmar 3GMD, 5.5 kw, no sound shield
hours? -- lots (no meter), but quite old.

engine designed (re: da book) for propulsion with raw water cooling,
heat probe 140f, can only find max of 160 or 165f, need 185f yo stop
alarm.
running on same keel cooler as main engine.
vibration and noise, very liveable.

Ted
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Old 12-22-2016, 01:38 PM   #32
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Onan Model MDKBH 5kW. Turns at 2900 rpm. That is correct, 2900 rpm. 8 seasons old, and 756 hours. Boat engines 8 years and 2800 hours. https://powersuite.cummins.com/PS5/P...ets/a-1475.pdf
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Old 12-22-2016, 06:04 PM   #33
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Northern Lights 5kw, 1800 rpm. 10 years service, 1500 hours . No problems. Quieter without a sound shield than the old Onan I removed that had one.
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Old 12-22-2016, 06:09 PM   #34
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11.5 kva Onan. 6 months old with 120 hrs on it and she runs at 1500rpm for 50 Hz.
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Old 12-22-2016, 07:07 PM   #35
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I have an Onan MDJE 7.5 kw paint shaker with 2500+ hours that still runs well. I do need to put some new mounts under it though to quell some of the vibes. Oh forgot to say, 1800rpm.

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Old 12-22-2016, 07:23 PM   #36
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A lot of Low RPM generator good ..

I notice really bing difference of noise (vibration frequency) form 1500 and 1800RPM
I really dont like high RPM get set, this is too much RPM for diesel engine.
I notice not so many hours on generators.
I love generator with Yanmar motor

Hugues
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Old 12-22-2016, 07:27 PM   #37
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Quote:
Originally Posted by 101TUG View Post
A lot of Low RPM generator good ..

I notice really bing difference of noise (vibration frequency) form 1500 and 1800RPM
I really dont like high RPM get set, this is too much RPM for diesel engine.
I notice not so many hours on generators.
I love generator with Yanmar motor

Hugues
Some diesels are happy running at 3600 rpm's. I once saw a Fischer Panda powered by a Farymann 2 cylinder diesel that had in excess of 5000 hours on it. The owner said it was an original engine and that it ran fine!
Bruce
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Old 12-22-2016, 07:52 PM   #38
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Quote:
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Some diesels are happy running at 3600 rpm's. I once saw a Fischer Panda powered by a Farymann 2 cylinder diesel that had in excess of 5000 hours on it. The owner said it was an original engine and that it ran fine!
Bruce
This panda need to go to museum that the only one I head running good for 5000H
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Old 12-22-2016, 11:28 PM   #39
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Survey/ Generator who is 1800 and who is 3600RPM

7.5 MDJE. Est hours of 9000. Been looking for a new one over 15 years. Keeps running strong so why replace? Also use a Honda Eu2000. 900 hours on it in two years
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Old 12-23-2016, 09:22 AM   #40
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Quote:
Originally Posted by Bay Pelican View Post
Wow, only three have responded with significant hours on their generators. Argues against worrying about whether a 3,600 rpm or 1,800 rpm is the better fit for most boats.
I quite like the idea of "low" genset hours. On vessels most of us are own it shows a well thought out on engine alternator, solar panels, inverters and battery system combination. We normally run the 1800 RPM genset about 1/3 of the hours as the mains. Now if I had a +70 footer carrying a crowd the genset hours would be way up there, likely matching or exceeding the mains.

Of course for those who sit at the docks the hours will be understandably "low" on both the mains and genset.
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