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Sterndrive bellows split and the boat sinks: who pays?
Short answer
When the bellows on a sterndrive split,
water gets into the hull and the boat can sink at its berth.
Who pays depends on maintenance: wear and poor upkeep are commonly excluded in hull policies.
A sterndrive, or outdrive, puts the engine inside the boat and the drive leg outside on the transom. Where the shaft, exhaust and gear cable pass through the transom, rubber bellows keep the water out. Rubber ages: it perishes, cracks and eventually splits. Once the bellows have split, water seeps into the boat, often slowly and unnoticed. If the bilge pump fails or the battery goes flat, the boat settles lower day by day until it sinks at its berth. Then comes the question of who pays for the bellows, the engine and the salvage.
It turns on whether the loss counts as an accident or as wear. Hull policies are commonly written to cover sinking but exclude wear and tear, gradual deterioration and lack of maintenance. With us, sinking is covered from Basis Plus only, and defective maintenance is excluded in every tier. The split bellows themselves are almost always wear. For the damage that follows, the insurer will look at whether the bellows were renewed to the manufacturer's schedule and whether the cracks could have been seen. Leave visibly cracked bellows in place and you should expect the claim to be reduced or declined. Your own policy wording decides the detail.
Have the bellows renewed at the intervals the drive manufacturer sets and keep the invoices. Inspect them every time the boat is lifted, with the leg fully trimmed up and turned to one side so the folds open. Check the bilge regularly while the boat is afloat and make sure the bilge pump can run without you. If the boat does sink, report it straight away, before anything is thrown out, and keep the split bellows for the surveyor.
Worth remembering
Renewed and recorded
the loss can be assessed, the invoice speaks for you
Cracked and ignored
wear and poor upkeep, the claim may be cut
With split bellows it is not the split that decides the claim but the invoice for the last renewal.
Questions
What owners ask us about this
How often should sterndrive bellows be replaced?
At the intervals set by the drive manufacturer. Bellows that are cracked or perished should be replaced straight away regardless, as they can split without warning.
Will hull cover pay if my boat sinks because the bellows split?
That depends on the wording and on maintenance. Many policies cover sinking but exclude wear and lack of maintenance; with us sinking is covered from Basis Plus. If you can show the bellows were renewed to schedule, you are in a much stronger position.
How can I tell that the bellows are about to fail?
Look for fine cracks in the folds, hard or perished rubber and water in the bilge with no other explanation. Trim the leg fully up and turn it to one side when you check, or the cracks stay hidden.
Related
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