Diesels Afloat: The Essential Guide to Diesel Boat Engines by Callum Smedley & Pat Manley

Author:Callum Smedley & Pat Manley [Smedley, Callum & Manley, Pat]
Language: eng
Format: epub, pdf
Publisher: Fernhurst Books Limited
Published: 2022-02-28T21:00:00+00:00

Topping Up Lead-Acid Batteries

Lead-acid batteries (excluding genuine maintenance-free batteries) need to be topped up with distilled water.

Any part of battery plate which has been exposed to air will be useless thereafter, so neglecting this simple maintenance task can be detrimental to battery life.

Batteries that are worked hard need attention more frequently, so start off by checking monthly and adjust the time period as necessary.

Wear gloves, long sleeves and eye protection. Battery acid will burn skin and damage eyes. It can also damage clothing and many parts of the boat’s interior.

■ Wipe the battery tops with a clean cloth

■ Remove the stoppers of each cell – these may be screw-in or lift-off types

■ The liquid electrolyte should cover the plates by at least half an inch (12mm)

■ Top up, if necessary, with distilled water – deionised water from a car accessory shop is the cheapest

■ Some batteries have a tube that reaches down to the correct top-up level descending from the filler neck – top up to the bottom of the tube

■ After you’ve finished, wipe the batteries down with a solution of bicarbonate of soda to neutralise any acid

■ Note the date that you topped up

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