Emily Hartley
Why a Maintenance Log Is Worth the Bother
Most canal boats lead gentle lives. They potter along at three miles an hour, sit through quiet winters, and rarely see the kind of punishment a car engine takes. That gentleness is exactly why maintenance records matter. Problems on the waterways develop slowly — a stern gland that drips a little more each month, a skin tank that runs warmer than it used to, blacking that has worn thin along the waterline — and slow problems are easy to forget between one boating season and the next.
A maintenance log turns those vague recollections into solid facts. It tells you when the oil was last changed, how many engine hours you have clocked since the last service, and whether the anodes were replaced before or after the last blacking. It also does something quieter but just as valuable: it makes you plan costs rather than absorb them as unpleasant surprises. A boatyard bill of £900 for hull work stings less when you saw it coming twelve months earlier and put something aside each month.
What Belongs in the Log
You do not need to record every wiped rag and tightened bolt. What you want is a clear history of the work that affects safety, reliability and resale value. In practice, that means:
- Engine servicing — date, engine hours, oil and filter change, fuel filter and water separator, gearbox oil, impeller, coolant top-up, drive belt condition. Note the engine hour reading at every service, not just the date.
- Fuel and electrical work — fuel polishing or tank cleaning, battery replacement dates and types, alternator or solar controller changes, any 12V wiring repairs.
- Hull and watertight integrity — blacking date and number of coats, anode replacement, weld repairs, stern gland packing or greasing, weed hatch checks, bilge pumping observations.
- Gas and safety — Boat Safety Scheme examination dates and any advisories, gas hose replacement, bubble tester checks, smoke and carbon monoxide alarm battery changes.
- Domestic systems — water pump, shower pump, toilet servicing, stove flue sweeping, chimney and roof vent cleaning.
- Costs — parts, labour and who did the work. A rough figure is fine; a blank space is not.
Add a photograph or two where it helps. A shot of the engine bay before and after a service, or of new anodes welded in place, is worth more than a paragraph of description.
Choosing a System You Will Actually Keep
The best log is the one you update. Plenty of owners start a beautiful spreadsheet in April and abandon it by August. Be honest about your habits and pick accordingly.
- Paper notebook — keep it aboard in a dry cupboard with the boat's manuals. Write the date, engine hours and job in pen as soon as you finish. No battery, no signal, no fuss.
- Spreadsheet — ideal if you like totals. Columns for date, engine hours, job, parts, cost, and who did it. A simple running total of annual spend is genuinely eye-opening.
- Phone notes or a dedicated app — handy for snapping receipts and setting service reminders. Just remember to back it up, and be prepared to hand over a printed summary at sale time.
Whichever you choose, keep a one-page service summary at the front: last oil change, last blacking, last BSS, next jobs due. That single page is what a surveyor, buyer or insurer will actually read.
A Realistic Year on the Cut
Costs vary hugely with boat length, engine and how much you do yourself, but a sensible rhythm looks something like this.
- Every 100 to 200 engine hours, or annually — oil and filter change. DIY materials run to roughly £40–£60; a boatyard will charge £120–£200 depending on access and oil quantity.
- Annually — fuel filters, impeller, gearbox oil check, stern gland greasing, battery terminal clean, stove flue sweep before the cold arrives.
- Every two to four years — hull inspection and blacking. Expect £700–£1,200 for a narrowboat at a yard, more if pitting needs attention, plus crane or dry dock fees.
- Every three to five years — anodes, depending on your cruising waters and shore power use.
- Every four years — Boat Safety Scheme examination, typically £150–£250, with any remedial work logged separately.
Write the next due date beside each job the moment you complete it. Future you will be grateful, and so will the person who eventually buys your boat.
Proving Care When You Sell
A well-kept log is one of the cheapest improvements you can make to a boat's value. Buyers are wary, and rightly so — a neglected engine or a hull with unknown blacking history is a gamble. A neat folder of service records, receipts and photographs shifts the conversation from “what might be wrong?” to “what has been looked after?”
It can help in other ways too. Insurers sometimes ask for evidence of maintenance after a claim. Moorings and marinas may want to see that a boat is sound and regularly used. Even a surveyor works faster and more confidently when there is a history to check against what they find.
You are not trying to produce a perfect record. Honest entries noting a temporary fix, a persistent drip or a job deferred to next spring are more useful than a suspiciously flawless list. Boats need work; that is normal. What matters is that the work is written down.
Start With Today's Entry
You do not need to reconstruct years of history. Begin with the present: note the date, the engine hours on the gauge, the last known oil change and blacking, and the jobs you know are coming up. From then on, add an entry whenever you lift the engine cover, scrub the waterline or pay a yard bill.
Ten minutes with a notebook after each job is all it takes. Do that for a few seasons and you will have something genuinely valuable — a plain, practical account of a well-cared-for boat, and a clear idea of what she will cost you next year.
