Boat Repower & Motor Replacement

Outboard motor replacement makes sense at a specific crossover point — when the rebuild quote passes roughly half the cost of a new motor — and we'll show you which side of that line your boat is on.

CALL [PHONE] · BOOK A REPOWER ASSESSMENT

The costs nobody quotes you upfront

A repower is rarely just the price of the motor. What gets left out until late:

Rigging. Controls, cables or electronic throttle, wiring harness, gauges or a digital display, key switch and lanyard. On an older boat moving to a modern motor this is frequently a substantial line item on its own — the new motor may not speak to anything currently on your dash.

The transom. A new motor is often heavier than what it replaces, and transom condition on an older boat is not guaranteed. We check for rot, delamination and soft spots before anything is ordered. Finding a soft transom after you've bought a motor is the worst possible sequence.

Height and setback. Transom height has to match the shaft length, and mounting height affects performance. Getting it wrong costs speed and can cause ventilation.

The propeller. A different motor almost always wants a different prop. Budgeting for one avoids a boat that runs badly on a brand-new engine.

Fuel system. Older tanks, lines and connectors sometimes need replacing to suit a modern motor — and ethanol-era rubber often should be replaced anyway.

Steering. Higher-power motors may require hydraulic steering where mechanical was adequate before.

We assess all of it before you commit, so the number you're given is the number.

Still deciding whether to repower at all?

That decision belongs on a different page. Compression and leak-down testing, the rebuild-versus-repower comparison, and an honest answer on whether your motor is worth saving are all here:

→ Outboard overhaul — is it worth rebuilding?

This page assumes the decision is made. Everything below is about doing the repower properly: what it actually costs, what the boat needs, and what gets missed until late.

Repowering an outboard

Comparatively straightforward — the motor bolts to the transom.

Old motor removed · transom inspected and prepared · new motor mounted at correct height · rigging installed and routed · fuel system connected and checked · props fitted and tested · gauges calibrated · water test and prop-pitch confirmation.

Four-stroke or two-stroke? New two-strokes are direct-injection and a legitimate choice — lighter, better hole shot, simpler. Four-strokes are quieter, more economical and now dominate. Weight is the deciding factor on smaller boats more often than people expect.

Repowering an inboard or sterndrive

More involved, because the engine is inside the boat.

Engine out through the hatch or via a lift · mounts, stringers and bed inspected · drive and transom assembly assessed · new engine fitted and aligned properly · exhaust, cooling and fuel connections · controls and instrumentation · bellows and drive service while access is open.

Alignment is not optional. An engine installed out of alignment destroys couplers, gimbal bearings and transmission bearings, and the damage shows up a season later looking like something else.

A remanufactured long block is often the better-value route on inboards than a complete new package — worth comparing before defaulting to either.

Is your boat worth repowering?

Sometimes the honest answer is no.

Yes, usually, when: the hull and transom are sound, you like the boat, and the motor is the only major problem.

Think hard when: the repower approaches or exceeds what the boat is worth, the transom or stringers need work, or you've been thinking about a different boat anyway.

A repower can outlast the boat. On a sound hull that's excellent value. On a tired one it's money that doesn't come back.

We'll tell you which you have.

What it costs

Quoted per boat — the motor is the visible cost and rigging, props and transom work are the ones that vary. How we quote.

An assessment before you shop is worth doing. Knowing your transom condition, shaft length, rigging compatibility and prop requirement means you're comparing real numbers rather than sticker prices.

FAQ

How much does boat motor replacement cost?
The motor plus rigging, props and any transom work. Rigging is the line most often underestimated, especially on older boats moving to modern controls.

When should I repower instead of rebuilding?
That's the decision this page doesn't make — it's answered here, with compression testing and the actual comparison.

What's the cost to replace an inboard boat engine?
More than an outboard for the same power, because of access, alignment and connections. A remanufactured long block is often better value than a full new package.

Will a new motor fit my existing controls?
Frequently not. Modern motors often use electronic controls and digital gauges that older rigging can't drive. We check compatibility before you order.

Do I need a new propeller?
Almost always. Different motor, different prop — budgeting for it avoids a new engine that runs badly.

Can you check my transom before I buy?
Yes, and you should. Finding rot after buying a motor is the worst order to do this in.

Two-stroke or four-stroke?
Modern direct-injection two-strokes are lighter with better hole shot; four-strokes are quieter and more economical. Boat weight capacity often decides it.

Do you install motors bought elsewhere?
Yes / policy — tell us what you're considering and we'll confirm it suits the boat before you buy.

CALL [PHONE] · BOOK A REPOWER ASSESSMENT