Free and printable
Write every service down the same way and her history answers the questions that come up later: what was done, at how many hours, by whom, and when it’s due again.
Print the log below, or work out when the next service is due.
A good entry
An example. Take intervals from her own manuals.
What to write down
A log is only as useful as its worst entry. These are the details a mechanic, a buyer or a warranty claim will ask for.
The day the work was done, not the day the invoice arrived.
Read it off the unit that was serviced. Most intervals run on hours, so a log without them can’t tell you what’s due.
Port main, starboard main, generator. Twin engines drift apart, and so do their services.
Fluids, quantities and part numbers, so the next person puts back the same thing.
The shop, the tech or the owner, and the invoice to go with it.
In hours and as a date. Whichever comes first is the one that counts.
When is it due
Most manuals give two limits, like every 250 hours or once a year. How hard she’s run decides which one arrives first, and a boat that mostly sits gets serviced on the calendar.
When it’s due
Fill in the interval and the last service to see when it’s due.
Print the log
Equipment aboard at the top, with serial numbers and intervals. Service entries below. Keep it with the ship’s papers and the invoices.
Boat maintenance log
The page is wider than your screen. Scroll the tables sideways to see every column.
| Unit | Make and model | Serial number | Service interval |
|---|---|---|---|
| Port main engine | Diesel inboard, 440 hp | From the data plate | 250 hours or 12 months |
| Date | Unit | Hours | Work done and parts | Done by | Cost | Next due |
|---|---|---|---|---|---|---|
| Aug 12, 2026 | Port main | 1,180 | Oil and filter. 15W-40, 14 qt | Harbor Diesel | $420 | 1,430 hrs or Aug 12, 2027 |
Free from yachtgrade.com/boat-maintenance-log. Keep the invoice for every entry.
In YachtGrade
Paper works until a page goes missing or nobody writes the hours down. YachtGrade keeps the log from the work itself.
Every unit aboard.
Engines, generator and the rest, each with its own service history.
Hours with proof.
Each hour reading is logged against a photo of the meter.
Due dates from her hours.
Hours or months, whichever comes first, projected from how she’s actually run.
Intervals from the manual.
Upload a manual and the service intervals come back with the page they came from, waiting for your yes.
Invoices filed for you.
Drop in a yard bill and each line files to the equipment it concerns.
Nothing guessed.
If a service was never recorded, it says so instead of inventing a due date.
Example
Port main engine
1,262 hours
Read from a photo of the meter
Intervals read from her manual keep the page number they came from.
If she’s your own boat
Most people who print a log are keeping their own boat’s history. Nothing here asks for an email.
Keep the log yourself.
Print it, fill it in after every service, and the next mechanic can read her history off one page.
Or ask whoever services her.
If they use YachtGrade, each invoice line files itself against the right equipment, and her record builds as the work happens.
One boat is enough.
If you’d rather keep it yourself, the minimum is $59 a month, which covers up to three boats, and every user is included.
Her checklist and her guide are free too.
A boat inspection checklist built from what is actually aboard her, and a QR code for the dash that explains her to whoever is aboard.
Prove it, then own it
30 days free on up to 3 boats. No card and no sales call.
Four promises
Service intervals come from each manufacturer. Check her manuals before relying on any interval, including the examples on this page.