Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-07-2018, 04:38 PM   #1
Senior Member
 
Solly's Avatar
 
City: Solomons MD.
Country: USA
Vessel Name: Sun Runner
Vessel Model: 1985 Mainship 34 Trawler MK III
Join Date: Mar 2018
Posts: 106
Generator suggestions.

OK bought a new to me 1985 34T MK III. has the 200hp Perkins.
No generator onboard. But the elec. panels are setup for one.
I'm guessing the genny sits behind the engine ? Where does the exhaust exit. There is a large metal thru hull on the back aft port side in the area of the lazarette. Looks to be blocked off. Did the genny sit back in there ? Long run for a genny in the engine room. Has the single 200 gallon fuel tank in there.

Many changes over the years. Found 4 water tanks. 3 hooked up to 1 fill and 1 vent. They are gone for 1 new one and 1 original one hooked up right. Need to dig the last one out of the lazarette to see the thru hull.

Any suggestions on a generator ? Size ? Mainly want it to run the water heater for showers and morning coffee. Maybe not at the same time.
__________________
Advertisement

Solly is offline   Reply With Quote
Old 04-07-2018, 05:09 PM   #2
Guru
 
djmarchand's Avatar
 
City: Litchfield, Ct/Punta Gorda, Fl
Country: USA
Vessel Model: Atlas Pompano 23
Join Date: Aug 2012
Posts: 4,651
With that kind of load- hot water, coffee and of course battery charging; you don't want a big genset. For light duty use, maybe a couple of dozen overnights each year I would look at one of the 3.5KW units made by NextGen or Phasor.

I have the NextGen unit. The single cylinder Kubota engine runs at 2,800 rpm as the generator is belt driven at 1,800 rpm. It is a solid engine and a well known Markon generator end with a simple capacitor exciter circuit. Not much to go wrong. The enclosure keeps the engine noise down but the exhaust is a little put-putty due to the single cylinder.

Mine handles the loads you mentioned just fine. With the batteries well discharged and my 100A charger I am not sure you can run all three: charger, water heater and coffee maker at the same time. The charger pulls 15A AC with discharged batteries. But once the charger load drops to less than 10A AC it will run all three.

It can run the 12,000 BTU A/C but not with the hot water heater and coffee pot simultaneously. Just manage your loads and you will keep a 3.5 KW unit happy and well loaded.

The cost is almost half of a top of the line 5 KW Northern Lights genset.

David
__________________

djmarchand is online now   Reply With Quote
Old 04-07-2018, 05:17 PM   #3
Guru
 
Keysdisease's Avatar
 
City: South Florida
Country: USA
Join Date: Sep 2014
Posts: 689
Welcome Solly. On the MKI the generator did sit just aft of the engine on a shelf spanning the stringers. The exhaust exited port side aft on the transom.
For hot water you can get a water heater with a heat exchanger that uses engine heat to heat the water, but of course only works when engine is running or hot for awhile after shutdown. Most marine hot water heater manufacturers offer this as an option and the plumbing is very simple and straightforward.
In your area you should have no problem getting service on any major brand. Northern Lights is typically considered one of the best if not the best. The other major brands like Kohler and Westerbeke seem to make good product. Mainship put Next Gen 3.5's in many Pilots, people seem to swear at them or by them. For A/C 4.5 -5 kw I think is the minimum to run an A/C and just a few other low energy items. Less for your needs, but many smaller units run at more than 1800RPM and are often called the "mouse that roared."

My $0.02
Keysdisease is offline   Reply With Quote
Old 04-07-2018, 05:54 PM   #4
FOG
Guru
 
FOG's Avatar
 
City: Wilmington, NC
Country: USA
Vessel Name: DreamQuest
Vessel Model: Prairie 36
Join Date: Jan 2016
Posts: 549
As suggested above plumb the water heater to the main engine.
As for the coffee, install an inverter. Both of those projects are going to be a lot less money than a generator.
However, if you want more than that, for example air conditioning, then you’ll need a generator.
FOG is offline   Reply With Quote
Old 04-07-2018, 07:33 PM   #5
Guru
 
foggysail's Avatar
 
City: Ashland, MA
Country: United States
Vessel Model: 1990 Silverton 40 aftcabin
Join Date: Jul 2016
Posts: 1,065
My personal choice is strictly related to the generator’s rpms. I would prefer 1800 over 3600. If an 1800 rpm engine is used to drive the genny, it will have greater HP than one operating at the higher rpms. Not picking on 3600 machines, just my preference.
foggysail is online now   Reply With Quote
Old 04-07-2018, 08:01 PM   #6
Guru
 
Simi 60's Avatar
 
City: Queensland
Country: Australia
Vessel Model: Milkraft 60 converted timber trawler
Join Date: Jul 2016
Posts: 2,034
Slow spinners for me as well.
Also bear in mind that pretty much all of the big name big expense gensets use someone else's engine and end.
You could always buy based on data and componentry vs advertising and what the rest of the herd does
Simi 60 is offline   Reply With Quote
Old 04-07-2018, 08:08 PM   #7
Guru
 
Simi 60's Avatar
 
City: Queensland
Country: Australia
Vessel Model: Milkraft 60 converted timber trawler
Join Date: Jul 2016
Posts: 2,034
Quote:
Originally Posted by FOG View Post
As suggested above plumb the water heater to the main engine.
As for the coffee, install an inverter. Both of those projects are going to be a lot less money than a generator.
However, if you want more than that, for example air conditioning, then you’ll need a generator.
Coffee?
What about gas - we have plenty of power but don't use electric for coffee.
Simi 60 is offline   Reply With Quote
Old 04-07-2018, 08:09 PM   #8
Guru
 
High Wire's Avatar
 
City: Cape May, NJ and Englewood, FL
Country: USA
Vessel Name: Irish Lady
Join Date: Dec 2007
Posts: 2,703
For that little load, go inverter/charger and at least four 6 volt golf cart batteries for a house bank and a 100 amp alternator. If you had air conditioning, yes you would need a small gen around 3.5-4 Kw.
__________________
Archie
1984 Monk 36 Hull #46
Currently in Cape May, NJ
High Wire is offline   Reply With Quote
Old 04-07-2018, 08:11 PM   #9
Guru
 
Jeff F's Avatar
 
City: Great Lakes
Country: Canada
Vessel Name: Mazurka
Vessel Model: Mainship 34 Original
Join Date: Nov 2015
Posts: 572
This is the install on my M1. Think this is where they were OEM.

Click image for larger version

Name:	ForumRunner_20180407_211006.jpg
Views:	123
Size:	54.7 KB
ID:	74940
Jeff F is offline   Reply With Quote
Old 04-07-2018, 08:34 PM   #10
Guru
 
Keysdisease's Avatar
 
City: South Florida
Country: USA
Join Date: Sep 2014
Posts: 689
Yes Jeff, that is the original OEM install place where Mainship put the legendary CrossPower single cylinder Volvo powered genset.

Nice looking engine space BTW, very nice

Quote:
Originally Posted by Jeff F View Post
This is the install on my M1. Think this is where they were OEM.

Attachment 74940
Keysdisease is offline   Reply With Quote
Old 04-07-2018, 10:31 PM   #11
Guru
 
City: Atlanta
Country: USA
Join Date: Jun 2012
Posts: 1,262
Quote:
Originally Posted by Simi 60 View Post
Also bear in mind that pretty much all of the big name big expense gensets use someone else's engine and end.
Yes and it gets stranger. We're installing a 1.2 megawatt Kohler unit now in our building. It has a Mitsubishi engine (2000+ hp), a Stamford head-end, and was built in France!

We truly live in an international world.
makobuilders is offline   Reply With Quote
Old 04-08-2018, 10:27 AM   #12
Senior Member
 
Solly's Avatar
 
City: Solomons MD.
Country: USA
Vessel Name: Sun Runner
Vessel Model: 1985 Mainship 34 Trawler MK III
Join Date: Mar 2018
Posts: 106
Thanks guys, great ideas and info !!
Boat does have heat and AC but not worried about using it. Fair weather boater. If it's to hot, cold, or windy we stay home ! Nice plugged in at the dock though..
Water heater plumbed to the engine is a good way to go. I've had one b-4 and it worked OK for our use.
Not a big fan of inverters. Another way to drain the batteries. Trying to avoid that. We do have 2 group 31's for a house bank. But new to us boat and a 12V fridge I'm not sure about the loads. Time will tell. At least the start battery is separate.
Do have an LPG stove top could always learn to perk coffee....
Have to look for a used genny if we get one. For what we need a new one would be a stretch.
Solly is offline   Reply With Quote
Old 04-08-2018, 11:27 AM   #13
Guru
 
foggysail's Avatar
 
City: Ashland, MA
Country: United States
Vessel Model: 1990 Silverton 40 aftcabin
Join Date: Jul 2016
Posts: 1,065
One thing to be aware of with used generators is age. For example, we have a Koehler 7.5KW genny that is the cat’s meow. The problem is that it is almost impossible to purchase many replacement parts for this great machine. Last year I had a machine shop make a needed part for the cooling system because none were available. There is a company in North Carolina that does sell many parts but at the time I needed one, it was not available.
foggysail is online now   Reply With Quote
Old 04-08-2018, 10:20 PM   #14
Senior Member
 
City: Owings, Md
Country: US
Join Date: Jan 2016
Posts: 345
Our 34 MKIII boat is also in Solomons, hauled out at the moment which we self installed a generator in our two years ago, the boat never had one before. Placed the generator where Jeff F has his but across the boat rather than in line with the centerline. The exhaust runs thru a lift can muffler and then aft down the port side. It is a big job I wouldn't recommend everyone to take for themselves but I is at least worthwhile to educate yourself on the how's and why’s of it's placement and configuration so you can operate and maintain it correctly. We went with a very small company called Alpha Generators, the owner was great to work with. I never hesitate to crank it up and run the AC as you know the humidity on the bay can be misserable in the summer, it really makes life better, that said the biggest improvement made on the boat to date has been an autopilot. I can PM my number if you are interested in seeing how we set the generator up, the boat is at Calvert Marina now, hauled out.
Gdavid is offline   Reply With Quote
Old 04-08-2018, 10:36 PM   #15
Senior Member
 
City: Owings, Md
Country: US
Join Date: Jan 2016
Posts: 345
Solly, I just looked at your profile and recognized your boat, we are about 4 boats to starboard of you right behind the tree service trucks, boat is named ”Still Pandemonium” I noticed your boat a couple of weeks ago, it looks great. We should be getting launched this coming Friday. Small world.
Gdavid is offline   Reply With Quote
Old 04-09-2018, 05:33 AM   #16
Guru
 
Cigatoo's Avatar
 
City: Narragansett Bay
Country: New England
Vessel Model: Grand Banks 36
Join Date: Sep 2016
Posts: 708
Thumbs up

“Do have an LPG stove top could always learn to perk coffee.... “

Perked coffee in the morning is one of the great joys of waking up on my boat.
Cigatoo is offline   Reply With Quote
Old 04-09-2018, 06:57 AM   #17
Guru
 
ranger42c's Avatar
 
City: Maryland
Country: USA
Vessel Model: 42' Sportfish
Join Date: Aug 2013
Posts: 4,443
The genset in our '87 Mk III was in the lazarette. Don't know if it was an "OEM" install or not, but Luhrs Group companies often left lots of stuff (ACs, maybe generators) to their dealers for installation after deliver from the factory...

I don't remember the brand or size... but we had AC so it was big enough to run that plus water heater and so forth at the same time.

FWIW, I'd prefer generators that can charge their own battery.


Quote:
Originally Posted by Solly View Post
Thanks guys, great ideas and info !!
Boat does have heat and AC but not worried about using it. Fair weather boater. If it's to hot, cold, or windy we stay home ! Nice plugged in at the dock though..
Water heater plumbed to the engine is a good way to go. I've had one b-4 and it worked OK for our use.
Not a big fan of inverters. Another way to drain the batteries. Trying to avoid that. We do have 2 group 31's for a house bank. But new to us boat and a 12V fridge I'm not sure about the loads. Time will tell. At least the start battery is separate.
Do have an LPG stove top could always learn to perk coffee....
Have to look for a used genny if we get one. For what we need a new one would be a stretch.

We found July and August around here to be bearable at anchor because we could run the AC during the days for a while when necessary.

I think I remember our stove was a combination alcohol and electric. The alcohol part sucked, and the electric part was another reason we appreciated having the genset at anchor.

An inverter would have been great. Plenty of room to add more batteries, and that way we could have made morning coffee (coffeemaker) and evening popcorn (microwave) without have to start the generator at less convenient times. We'd usually run the genset to heat water and do real cooking at least once/day anyway, but not having to start it at oh-dark-thirty in the morning for coffee, or just to heat up hors d'oeuvres for Happy Hour (for example) would have been an improvement.

We could do perk coffee on the propane grill in the cockpit, though, and that was a decent option.

-Chris
__________________
South River, Chesapeake Bay
ranger42c is offline   Reply With Quote
Old 04-09-2018, 07:02 AM   #18
Guru
 
Maerin's Avatar
 
City: East Coast
Country: USA
Vessel Name: M/V Maerin
Vessel Model: Solo 4303
Join Date: Jun 2013
Posts: 759
Quote:
Originally Posted by Solly View Post
Do have an LPG stove top could always learn to perk coffee....
If you don't mind making a cup at a time, an Aeropress is what we use so we don't have to use the 120V coffeemaker. It makes the best cup of coffee you'll find. With guests aboard, we plug in the coffeemaker. No worries with the inverter and a 1200 AH bank.
__________________
Steve Sipe
Selene 4303 Maerin
http://maerin.net
Maerin is offline   Reply With Quote
Old 04-09-2018, 08:13 AM   #19
Senior Member
 
City: Owings, Md
Country: US
Join Date: Jan 2016
Posts: 345
You really do need to determine your energy (not just electic) needs first and then figure out how to provide it. It would probably best to run the boay as is for a season to figure out your needs. For those that want AC away from the dock, there is no practical way around generator's but if that isn't a requirement for you, it shouldn't be hard to do without unless you spend alot of time anchored out. I find that the engine heated hot water tank is usually still warm enough for a shower in the morning if I ran the day before. The engine room stays warm for quite some time which keeps the water heater from losing much heat. Due to the engine room heat, it is pretty hot in the salon in the summer when running and for hours afterward. I usually only get hot after returning in a harbor where there is no breeze blowing and I am off the bridge, if you always return home or to a transient slip, you probably won't miss a generator at all.
Gdavid is offline   Reply With Quote
Old 04-09-2018, 09:46 AM   #20
Senior Member
 
Solly's Avatar
 
City: Solomons MD.
Country: USA
Vessel Name: Sun Runner
Vessel Model: 1985 Mainship 34 Trawler MK III
Join Date: Mar 2018
Posts: 106
Quote:
Originally Posted by Gdavid View Post
Solly, I just looked at your profile and recognized your boat, we are about 4 boats to starboard of you right behind the tree service trucks, boat is named ”Still Pandemonium” I noticed your boat a couple of weeks ago, it looks great. We should be getting launched this coming Friday. Small world.
That is funny !!
We've been trying to get stuff done on the boat and haven't really looked around at the other boats.
Going to try and get 'Sun Runner' launched soon too.
If we're still together there, and all there at the same time, I'd love to get a look at another 34 ! We have a slip at Calvert Marina out on the point.
First year with it and a big learning curve. Not our first boat but I like to dig into the systems and have some idea what works and how.
Thanks!!
__________________

Solly is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 09:56 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012