A 55Ah AGM battery is enough to start a 40hp engine? - SailNet Community
LinkBack Thread Tools
post #1 of 2 Old 05-17-2012 Thread Starter
Senior Member
PCP's Avatar
Join Date: Dec 2004
Location: Portugal, West Coast
Posts: 16,505
Thanks: 21
Thanked 113 Times in 96 Posts
Rep Power: 13
A 55Ah AGM battery is enough to start a 40hp engine?

The AGM battery is this one:

AGM 12/55 | Mastervolt Marine

Model AGM-55Ah

Nominal voltage 12V
Nominal capacity (C20) 55Ah
Reserve capacity* 80 min
Number of cells per battery 6
Maximum charge current: 15.3A
Approximate weight: 17.0 kg
BCI group number 63
CCA to DIN 300A
CCA to SAE 480A


Continual discharge: 50A
Discharge time t ≤ 2min: 150A
Discharge time t ≤ 10sec: 300A


The engine this one:

Sail Drive - LDW 1404 SD - Lombardini Marine - Motori entrobordo diesel marini e gruppi elettrogeni per la nautica - Inboard diesel marine engines and generators
PCP is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
post #2 of 2 Old 05-17-2012
Senior Member
celenoglu's Avatar
Join Date: Dec 2008
Posts: 737
Thanks: 0
Thanked 18 Times in 17 Posts
Rep Power: 9
Re: A 55Ah AGM battery is enough to start a 40hp engine?

Yes, this is good enough.
celenoglu is offline  
Quote Quick Reply Share with Facebook

Quick Reply

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Forum Replies Last Post
Yanmar 3YM 30 start battery Brahmany C320 3 03-06-2011 06:00 AM
Engine Start Key bacampbe General Discussion (sailing related) 11 04-05-2010 09:29 PM
Battery Design: Start + 4 6V T-105s SausalitoDoug Gear & Maintenance 15 04-23-2009 10:55 PM
Start Battery Cruisingdad Gear & Maintenance 35 12-25-2006 02:01 AM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome