Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 07-09-2012, 17:01   #31
Moderator Emeritus
 
Ex-Calif's Avatar

Cruisers Forum Supporter

Join Date: May 2007
Location: Singapore
Boat: Maxi 77 - Relax Lah!
Posts: 11,514
Images: 4
Re: Yanmar 3GM30 Starting Battery Size ?

Quote:
Originally Posted by Azul View Post
I have a Yanmar 3GM30 and it starts instantly with a single Group 29 deep cycle battery, I have two of them on separate banks (with plans for two more) but now leave the Guest battery switch on "All" <snip>

<snip>

. Batteries and ground tackle are two areas where redundancy is not just a good idea but mandatory.
Not trying to misquote you but these two statements seem at odds.

I know you are planning a significant solar system to keep things charged but running one bank isn't redundant.

I have 3 G24s split as 1 and 2. On the hook we run the 2 batteries paralleled and usually end up running the house down pretty low. The start battery is always charged to get us going from wherever we are.

Yes - they are all the same (Delco Marine AGM) and deep cycle batts for the house is recommended but at this point with my small boat simplicity is more important. The batteries are 4 years old and seem to be doing well. I top off with solar trickle charging at about 1 1/2 amps.
__________________

__________________
Relax Lah! is For Sale <--- Click
Click--> Custom CF Google Search or CF Rules
You're gonna need a bigger boat... - Martin Brody
Ex-Calif is offline   Reply With Quote
Old 10-12-2012, 12:22   #32
Registered User

Join Date: Dec 2012
Posts: 650
Re: Yanmar 3GM30 Starting Battery Size ?

I would no longer install a lead-acid battery. I would install a lithium-phosphate battery. For a similar size and weight, a lithium-phosphate battery has 3-4 times the capacity, a much lower discharge rate when not in use, a much longer lifetime (in both years and cycles), a lower failure rate, and is much safer (including in a fire). The only disadvantage is price.
__________________

__________________
mcarling is offline   Reply With Quote
Old 10-12-2012, 13:16   #33
Registered User

Join Date: Jun 2007
Location: SW Florida
Boat: FP Belize, 43' - Dot Dun
Posts: 3,425
Re: Yanmar 3GM30 Starting Battery Size ?

Quote:
Originally Posted by mcarling View Post
The only disadvantage is price.
Unfortunately, price drives a lot of decisions.

Why a boat? Why not a G5?
__________________
DotDun is offline   Reply With Quote
Old 10-12-2012, 13:38   #34
Registered User

Join Date: Dec 2012
Posts: 650
Re: Yanmar 3GM30 Starting Battery Size ?

Quote:
Originally Posted by DotDun View Post
Unfortunately, price drives a lot of decisions.
For a similar capacity and adjusted for the difference in useable life, lithium phosphate batteries are not terribly expensive.
__________________
mcarling is offline   Reply With Quote
Old 14-01-2017, 00:43   #35
Registered User

Join Date: Sep 2010
Posts: 844
Images: 1
What does D31L mean?

Quote:
Originally Posted by MechMan View Post
From the manual... 12V 64 AH or more (type 95D31L or equivalent)

Mine doesn't stress the start battery at all. Starts after one or two revs.
Got a motolite D31L battery starting my 3GM 30 now, and it does the trick w. no problem. Have no idea, however, what "D31L" stands for, and what "group" of batteries this may belong to. The battery also says "33MF" on it, an I have no idea what this means either. Anybody know?

Have two in the bank, only one connected at the moment, and both have the same numbers above, however, a third set of numbers on one of the batteries reads "N70L" and the other reads "N70ZZL". Any idea what this could mean and if there would be problems wiring both together in the same bank?

All advice welcomed.

Thanks gang,

G2L
__________________
Gone2long is offline   Reply With Quote
Old 14-01-2017, 01:26   #36
Registered User

Join Date: Sep 2010
Posts: 844
Images: 1
Re: What does D31L mean?

Just figured out that mine is a group 27 - 12.1" x 6.8"


That's part of the answer I needed.


G2L
__________________
Gone2long is offline   Reply With Quote
Old 14-01-2017, 03:51   #37
Registered User
 
SV Windrush II's Avatar

Join Date: Dec 2013
Location: Somewhere in the Philippines
Boat: Mariner 40 Ketch
Posts: 452
Images: 18
Re: Yanmar 3GM30 Starting Battery Size ?

I have a 3GM30 and use a group31 105 ah deep cycle for it. Has been my starting battery now for 3 years with no issues.
__________________
Mariner 40 Ketch
SV Windrush II is offline   Reply With Quote
Old 14-01-2017, 08:27   #38
Registered User
 
Training Wheels's Avatar

Join Date: Aug 2014
Location: Left coast.
Posts: 671
Re: Yanmar 3GM30 Starting Battery Size ?

I also have a 3GM30. By the manual a Group 24 battery has adequate CCA; when I renewed my batteries I put in a gp 27. Next time I'll do a 31, only because my house batteries are 31's.
__________________

__________________
Training Wheels is offline   Reply With Quote
Reply

Tags
3gm, 3gm30, battery, yanmar

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Oversized Yanmar 3GM30 Cylinder bore pierrrre Engines and Propulsion Systems 26 25-02-2015 23:01
One Starting Battery For Two Engines ? nnyerges Electrical: Batteries, Generators & Solar 26 24-01-2012 08:15
Killed Batteries ? Dockhead Electrical: Batteries, Generators & Solar 31 27-08-2011 05:14
Optimal Size of Starting Battery Lars_L Electrical: Batteries, Generators & Solar 25 10-08-2011 15:14
Route Properties, Missing Functions James Baines OpenCPN 13 13-07-2011 05:31



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 22:01.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.