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Old 11-16-2020, 02:20 PM   #1
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Used Generators

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I have a bayliner 3888 with 2 A/C units. The generator I have is a an OLD oden. I have thrown about 1K at it sense we bought the boat last January. It has run 3 times, survey and we got it going two other times. But after 3 mechanics the last guy didn't charge me and said the best thing I could do was replace it. It so old cant get parts and he said this model had issues leaking CO2.

Question is what size and brand would you smart folks suggest and second where could we look for one? The boat is in Niceville FL if that help with the where we can find one..

Trying to find a used or rebuilt..

As always thanks for the guidance and support...

Mike and the Admiral Karen
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Old 11-16-2020, 02:43 PM   #2
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Look on Boats & Harbors for Northern Lights....... it would help to know what KW you need.
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Old 11-16-2020, 02:58 PM   #3
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It looks like he has a gas powered boat. Does NL make gas gensets? If so they would be a good unit.
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Old 11-16-2020, 03:02 PM   #4
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With two A/Cs which each will take 15 amps or 3.6 kW total, I would go with a 7.5-8 kW model. That will give you enough power to run the ACs, battery charger and microwave, but not much more simultaneously.

Many people add up ALL of their potential AC loads and size their genset to run all at the same time. That is a mistake because it results in a very big genset that may be under loaded most of the time. Add all loads that need to be run simultaneously and maybe a little more. Then manage them to stay within that limit. A panel mounted AC ammeter is critical to make that happen.

Also I presume you currently have 50A 220/110V shore power and your transfer switch handles both legs of the 220V.

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Old 11-16-2020, 03:53 PM   #5
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A quick search here https://www.nauticexpo.com/cat/water...s-IB-1573.html turns up Cummins and Kohler gasoline gen sets. And here https://www.westerbeke.com/low-coefi...generators.htm Westerbeke. There may be other manufacturers as well.

OP is looking to purchase used however the above links will give him something to search for. In addition to Boats n Harbors mentioned above don't forget Craigslist and Ebay. Especially when searching for used older gear.
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Old 11-17-2020, 08:01 AM   #6
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With two A/Cs which each will take 15 amps or 3.6 kW total, I would go with a 7.5-8 kW model. That will give you enough power to run the ACs, battery charger and microwave, but not much more simultaneously.

Many people add up ALL of their potential AC loads and size their genset to run all at the same time. That is a mistake because it results in a very big genset that may be under loaded most of the time. Add all loads that need to be run simultaneously and maybe a little more. Then manage them to stay within that limit. A panel mounted AC ammeter is critical to make that happen.

Also I presume you currently have 50A 220/110V shore power and your transfer switch handles both legs of the 220V.

David
Davis she is 2 30 Amp 110 no 220.. thank you much for the input!
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Old 11-17-2020, 08:39 AM   #7
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Davis she is 2 30 Amp 110 no 220.. thank you much for the input!
Well, that is good to know. With 2*30*110= 6.6 kw for shore power you don't need any more than a 7-8 kW genset and you could probably get by with 5.5-6 kW.

David
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Old 11-17-2020, 09:02 AM   #8
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ebay often has used generator sets from Florida.
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Old 11-17-2020, 09:22 AM   #9
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ebay often has used generator sets from Florida.
Check with Sailorman in Ft Lauderdale. He sometimes has used generators on his lot. If you go there, take a sandwich because you have lots to look at.
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Old 11-17-2020, 09:37 AM   #10
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Greetings,
Mr. OD. "...lots to look at." Particularly in the new store. Hours of fun and amusement for the whole family...
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Old 11-17-2020, 09:52 AM   #11
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I could agree with having a minimal sized unit and managing power loads if the boat were a full time home. Our sport fish was a vacation home for us and I was never so happy as when I ditched our 8.5kw OEM unit for a 12 kw. With 2 a/c's, fridge, bait freezer, ice maker, on demand water heater, water maker, electric range, microwave, toaster and hair dryer to deal with, my life was a constant negotiation for power. For a vacation home, bigger is better so that folks use what the want when they want. Even under loaded mine outlasted the ownership of the boat.
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Old 11-17-2020, 10:01 AM   #12
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Greetings,
Mr. OD. "...lots to look at." Particularly in the new store. Hours of fun and amusement for the whole family...
And you can talk with the parrot too. Just dont put your fingers in the cage, the parrot does not like that and will defend its territory with its beak. You have been warned. LOL
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Old 11-17-2020, 01:38 PM   #13
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As always thank you for your input and guidance. I has some calls in on new generators (think they are going to be pricey) I will call Sailorman in Ft Lauderdale tomorrow.
Mike and The Admiral Karen
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Old 11-17-2020, 03:14 PM   #14
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With two A/Cs which each will take 15 amps or 3.6 kW total, I would go with a 7.5-8 kW model. That will give you enough power to run the ACs, battery charger and microwave, but not much more simultaneously.

Many people add up ALL of their potential AC loads and size their genset to run all at the same time. That is a mistake because it results in a very big genset that may be under loaded most of the time. Add all loads that need to be run simultaneously and maybe a little more. Then manage them to stay within that limit. A panel mounted AC ammeter is critical to make that happen.

Also I presume you currently have 50A 220/110V shore power and your transfer switch handles both legs of the 220V.

David
I agree. But remember, he is gas. And an underloaded gasoline engine is not as big of a deal as an underloaded diesel engine. I know it is difficult to get out of that mindset....
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Old 11-17-2020, 04:30 PM   #15
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Yes you are right, gasoline engines can tolerate significant under loading from a mechanical perspective. But they are horribly inefficient running under loaded.

I am looking at the specs on the gasoline genset that comes with the motorhome I have on order. It burns 0.3 gph at no load and 0.5 gph at half load. Part of that is running at 3,600 rpm even at no load. Inverter generators which Onan is finally making for RVs do much better at part loadings than 3,600 rpm engines. And did I mention they are quieter.

Don't expect marine versons any time soon though.

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Old 11-17-2020, 05:03 PM   #16
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I would start with boat load survey based on your total anticipated power needs and see what you need overall before you buy any genset used or new. You may find the house is undersized and needs added capacity for your needs ( live aboard vs weekender)
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Old 11-17-2020, 10:57 PM   #17
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First Iíve never heard of a 38í Bayliner with gas engines.

OEM the older ones came with Mitsubishi or Cummins 555 engines before Bayliner switched over to Hino engines which have proven over time to be almost indestructible.

Thats not to say someone didnít put gassers in the boat at some point though.

As far as generator size the larger Bayliners came with either a 8KW generator for boats without AC or a 12KW unit for boats with AC.

Since the OP has AC Iíd go with a 12KW unit, pick your poison as far as brand. Itís not like itís a really critical number, just make sure its big enough for the AC loads and make sure it gets loaded up some when not running the AC.
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Old 11-18-2020, 01:46 AM   #18
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Yes they made them in the 32 and the 38 iif I remember correctly.
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Old 11-18-2020, 02:47 AM   #19
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I have a few used gensets rated at 6kw. They run the D1105 Kubota at 1800 rpm. The engine is rated at 12.6 kw at 1800 so they have good starting current. These units are well maintained and have 4,000 to 10,000 hrs so are in excellent condition. The life of these units is usually 20-30,000 hrs. They come with control panel and usually have 110 and 220 twist lock receptacles. Only problem we are on opposite ends of the continent.
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Old 11-18-2020, 08:14 AM   #20
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Yes this Bayliner 3888 came with original gas 351 us marine engines.


How would I conduct a boat load survey? we have 2 A/C units, a water heater, stove fridge and 3 small electric heaters. All the lights have been changed over to LED..


Thanks Much!
Mike and the Admiral Karen
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