Free and printable

Print a free boat maintenance log.

A boat log book for the work done on the boat. Record service dates, engine hours, parts, costs and the next due date. Print a blank log below, or use the calculator to estimate when a service is due.

Record every service the same way and the boat’s history can answer the questions that come up later: what was done, at how many hours, by whom, and when it’s due again.

A good entry

Date: Aug 12, 2026
Unit: Port main engine
Hour meter: 1,180
Work and parts: Oil and filter changed. 15W-40, 14 quarts. Filter part number written on the invoice.
Done by: Harbor Diesel
Cost: $420
Next due: At 1,430 hours or Aug 12, 2027, whichever comes first

An example. Take intervals from the boat’s own manuals.

Print the log

A boat log book on one page, ready for the binder.

Equipment goes at the top, with serial numbers and service intervals. Service entries go below. Each table shows a clearly marked example row, but the examples are left out when you print. Keep the log with the ship’s papers and invoices.

Boat maintenance log

BoatMake and modelYearHull ID

The page is wider than your screen. Scroll the tables sideways to see every column.

Equipment aboard
Unit	Make and model	Serial number	Service interval
ExamplePort main engine	Diesel inboard, 440 hp	From the data plate	250 hours or 12 months

Service entries
Date	Unit	Hours	Work done and parts	Done by	Cost	Next due
ExampleAug 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.

The log prints on one page with 6 equipment lines and 16 service lines. The example rows are not printed. Print as many copies as you need.

When maintenance is due

Running hours or calendar time, whichever comes first.

Many manuals give two limits, such as every 250 hours or once a year. Run the boat hard and the hours come first. Let it sit and the calendar does.

When it’s due

Fill in the interval and the last service to see when it’s due.

What to write down

Six things every entry needs.

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 date

The day the work was done, not the day the invoice arrived.

The hour meter

Read the hours from the unit that was serviced. If its service interval is based on running hours, the log needs that reading to show when service is due.

Which unit

Port main, starboard main, generator. Twin engines drift apart, and so do their services.

The work and the parts

Fluids, quantities and part numbers, so the next person puts back the same thing.

Who did it

The shop, the tech or the owner, and the invoice to go with it.

When it’s due next

In hours and as a date. Whichever comes first is the one that counts.

How YachtGrade tracks maintenance

Track maintenance for every boat in YachtGrade.

Paper works until a page goes missing or nobody writes the hours down. YachtGrade keeps the log from the work itself.

A separate history for each piece of equipment.
Engines, generator and other equipment each keep their own service history.

Running hours with meter photos.
Each recorded hour reading can include a photo of the meter.

See what is due by hours or date.
Track running hours and calendar time, whichever comes first. Projected dates are based on recorded usage.

Propose service intervals from the manual.
Upload a manual and YachtGrade proposes the service intervals it finds, with the page each one came from. A person reviews and confirms them before they are added.

Invoices become proposed records, not automatic ones.
Upload a yard bill or work order and YachtGrade proposes the details it finds as a service record for the equipment. A person reviews and confirms the record before it is added. YachtGrade does not bill anyone or connect to QuickBooks.

Nothing guessed.
If a service was never recorded, YachtGrade says so instead of inventing a due date.

Example

Port main engine

1,262 hours
Read from a photo of the meter

Overdue
Raw water impellerDue 12 months after the last one.
Due soon
Fuel filtersDue at 1,290 hours at about 0.6 hours a day.
Later
Oil and filterDue 12 months after the last one, or at 1,430 hours.
Not recorded
Valve clearanceLog the last service to start the clock.

Intervals read from the manual keep the page number they came from.

However you found this page

Run it as a company, or keep your own boat’s history.

Companies print it to start a boat’s paper trail before it is in YachtGrade, or to hand a new tech its service history. Nothing here asks for an email.

Run it as a company.
Print it, fill it in after every service, and the next mechanic can read the boat’s history off one page. YachtGrade keeps the same log for each boat in the app.

Keeping your own boat’s history?
Print it and fill it in yourself. Or ask the company that services the boat to use YachtGrade: invoice details are proposed against the equipment they belong to, then a person reviews and confirms them before they go in the maintenance record.

Try YachtGrade yourself.
On a paid plan, $59 a month covers up to 4 boats, with every user included.

The printable boat inspection checklist is free too.
A boat inspection checklist built from what is actually aboard the boat. A QR code for the dash opens the Boat Brief with the boat’s startup steps, quirks and equipment locations. Boat Brief is a YachtGrade account feature, not a free tool.

Beta invite

Service companies among the first 100 in the beta get 5 boats free for life.

The first 100 beta members get 5 boats free for life. No card, no contract. We ask for honest feedback.

Paid plans have money-back guarantees on the first paid months. Your rate is locked for five years while your subscription stays active. Read the guarantees

YachtGrade™

Service intervals come from each manufacturer. Check the boat’s manuals before relying on any interval, including the examples on this page.