Maintenance on a boat: 71

Sep 04, 2023

Make sure your boat is ready to go back in the water with Practical Boat Owner's comprehensive guide

Replace any anode which has reduced 50% in size

Maintenance on a boat: 71-point skipper's checklist

A reduced shaft anode which really needs replacing

These might be expensive, but don't skimp on them – your underwater metals, from P-brackets to rudder bearings and seacocks, will thank you.

As a general rule, you should replace any anode once it has reduced by about 50% in size.

It is best to check seacocks when the boat is out of the water

There has been much debate regarding the use of seacocks made from ordinary brass or a bronze alloy that is susceptible to corrosion, potentially putting your boat at risk of sinking because of a failed and fractured seacock.

The perfect time to check them is while you’re out of the water.

Check that the metal hasn't gone pink, which would be a sign of dezincification, and that the metal is being eaten away (rub off corrosion with a wire brush, if necessary).

If in doubt, replace the seacocks with DZR brass, bronze or plastic alternatives.

Similarly, check the skin fitting and any bolts or threads for the same reason.

If you’re unsure, give the hose or seacock a sharp tug to check the fitting doesn't shear.

Check your keel bolts and studs. If you have any doubt about their integrity, seeks advice from a surveyor or experienced boat yard.

There are also other checks which can be done if the boat is ashore.

Full details at How to check keel bolts.

Fuel filters should be replaced annually

Before you relaunch the boat, de-winterise the engine – especially as this will keep antifreeze from entering the water when you run the engine afloat.

How to service a marine diesel engine in 12 simple steps

In brief, check the spark plug and run the motor in a suitable container of water to check it works.

You may find that the petrol has gone ‘stale’ over the winter and needs replacing – and the carburettor and jet may need cleaning out.

Check the regulator on the gas bottle

A quick check of the gas system is a must to ensure you don't have a potentially fatal problem in the year ahead.

Check the sheaves. Replace any worn parts

A quick rig check now should ensure you won't have a problem out at sea later.

Look for signs of wear around all rig fittings, like shrouds

heck the lenses of deck navigation lights are not crazed

Renewing the grease on the winches will keep them running smoothly all season. Credit: Theo Stocker

Inflate your lifejacket and leave for 24 hours to check for any leaks

Once you’re afloat, make sure you check for leaks

You can almost relax once your boat hits the water… but check these first to ensure she stays afloat!

Check for leaks in:

Before you start the engine:

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