Thread Tools Search this Thread
Old 31 May 2011, 05:20   #1
Country: UK - England
Town: Christchurch
Boat name: Woody
Make: Avon
Length: 4m +
Engine: Suzuki 25hp 4 stroke
Join Date: Nov 2010
Posts: 6
Flat battery

Hi All,

I have an Avon Adventure 400 with a Suzuki DV25. I went to use it this weekend but the battery was flat. The battery is a 60ah leisure battery from Halfords and is only a couple of weeks old. The battery has only been used to start the engine once and (presumably) is being charged when the engine is running. There's also a Navman fishfinder connected to the electrics, which was fitted by the dealer when the boat was new. There is no battery isolator switch, and so I am wondering whether it's possible for the battery charge to slowly drain away when the boat isn't being used?

Any ideas/suggestions much appreciated.

Many thanks,


pauldlf is offline   Reply With Quote
Old 31 May 2011, 05:30   #2
Country: UK - England
Town: New Forest
Length: 6m +
Join Date: Apr 2011
Posts: 50
Battery drain is entirely possible although it sounds like it's drained rather quickly. Try attaching a multimeter up to the circuit (disconnect the negative lead on the battery and put the multimeter between the lead and the negative terminal on the battery) to test if it is draining much. If no might be a duff battery, or perhaps your engine isn't charging correctly.

Even if it's not draining much, it's well worth installing an isolator - always good to switch it off when the boat's not being used, plus if you ever need to isolate the power in an emergency etc you can without having to worry about getting the spanners out!

PS. I think you mean DF25 :-)

marinesafety is offline   Reply With Quote
Old 31 May 2011, 08:30   #3
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 4,851
If you use a multimeter make sure to set it to current and on a high enough range, you may need to reposition the leads on the multimeter because they often use a shunt inside for the current range.
jwalker is offline   Reply With Quote
Old 31 May 2011, 09:00   #4
Channel Ribs's Avatar
Country: UK - Channel Islands
Town: Alderney
Length: no boat
Join Date: Sep 2006
Posts: 3,047
Originally Posted by pauldlf View Post
... fitted by the dealer when the boat was new. There is no battery isolator switch.
A battery isolator is a very good idea, for a few reasons.
Channel Ribs is offline   Reply With Quote
Old 01 June 2011, 13:58   #5
Country: UK - England
Town: southampton
Make: ribeye
Length: 6m +
Engine: 100
Join Date: Jul 2006
Posts: 169
No automatic bilge pump connected and running unbeknown to you.
ribber is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 00:35.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.