Brand New Cummins 6BTA5.9-M2 250HP Marine Diesel Engine
Brand New Cummins 6BTA5.9-M2 250HP Marine Diesel Engine
Delivered NZ-wide
Fully insured & tracked · GST and entry fees payable to NZ Customs on arrival
Est. delivery Tue 10 Nov – Sun 15 NovAvailable to order
Next shipment on the way
Contact us for lead timeOne year 'no bull' warranty
Every engine includes a 1-year warranty covering manufacturing and assembly faults, with 2 and 3-year Platinum cover available. Heat tabs are fitted so claims are simple and transparent. Installation by a qualified mechanic with a tax invoice is required to activate cover.
Don't get burned by cheap "suppliers"
Plenty of engines sold as "new" or "remanufactured" are worn cores with fresh seals and a coat of paint. Ours are built from new components only, hot tested before dispatch with QR-linked video proof, and carry a written warranty handled by our own team.
What makes Crate Engines the best choice?
- Brand new, never rebuilt – zero kilometres
- Known factory weak points engineered out
- No exchange or core charge – keep your old engine
- GST and entry fees payable to NZ Customs on arrival – no surprise fees on arrival
- Real people who know engines, Australian owned since 2017
Not sure it fits? Check with your VIN
Send us your VIN or engine code before you order and we'll confirm the exact engine for your vehicle. Use the quote button above or contact us.
Brand new Cummins marine engine — the 6BTA5.9-M2, 250HP, a 5.9-litre inline six with mechanical injection, turbocharging, aftercooling and engine-mounted heat-exchanger cooling. Delivered anywhere in New Zealand.
Specification
- 186 kW / 250 hp at 2,600 rpm reference rating
- 5.9-litre inline six, mechanical inline fuel injection
- Turbocharged and aftercooled, marine configuration
- Engine-mounted heat-exchanger cooling
- Complete engine assembly as photographed
Why the 6BTA is still the one people ask for
It is mechanical. There is no engine management to fail a long way from shore, it can be diagnosed and worked on with ordinary tools, and parts are available almost anywhere in the world. For a working boat or a repower where reliability matters more than refinement, that combination is hard to beat — which is why the 6BTA has outlasted a lot of cleverer engines.
Confirm the installation before you order
A marine engine is matched to the boat, not just to the bracket. Before ordering, send us:
- the plate from your existing engine
- your gearbox model and reduction ratio
- the vessel's duty — pleasure, light commercial or continuous
- installation measurements, including bearer centres and shaft height
The 250 hp figure is a reference rating. Whether it suits your vessel depends on the duty cycle, and that conversation is worth having before a purchase of this size, not after. Call us on +61 461 265 808.
Not the same as the industrial 6BT
We also list the Cummins 6BT 5.9L in long block and complete-assembly form for vehicle, truck and machinery use. That engine is not marine-configured — no heat exchanger, no aftercooler in this arrangement, no marine-rated accessories. Do not substitute one for the other.
New, not reconditioned
Zero kilometres, no unknown history, no exchange unit and no core charge. 1-year warranty on manufacturing and assembly faults; professional installation required.
Delivery to New Zealand
Flat freight NZ$710 North Island, NZ$790 South Island, GST-exclusive, crated and insured, typically 5–8 business days door to door. Prices exclude GST; New Zealand Customs collects GST and entry fees on arrival.
Built properly
What's inside this engine
Built to OEM+ specification with the known factory weak points engineered out, and quality tested before it leaves our warehouse.
Forged crankshaft
High-strength steel crankshaft with precision tolerances for durability and smooth operation.
Upgraded pistons
Common OEM piston and head cracking issues resolved with improved materials.
Improved oil galleries
Redesigned oiling to eliminate the starvation issues that kill factory motors.
Hot tested
Run-tested before dispatch, with QR-linked video proof of your unit.
Heat tabs fitted
Calibrated heat tabs keep warranty coverage transparent for you and for us.
QR traceability
QR code on every engine for full build and dispatch traceability.
Crated & insured
Packed for heavy freight and shipped fully insured to New Zealand, tracked all the way.
Direct fitment
Built to match your engine code — no modifications, no guessing part numbers.
Know what you're buying
New vs reconditioned crate engines
Plenty of engines sold into New Zealand are old, patched motors with new seals, called "remanufactured". Here's the honest difference with a brand new crate engine.
What we sell
Brand new crate engine
Built from new components only, to OEM+ specification, with the known factory weak points engineered out.
- Forged steel crankshaft, upgraded pistons, improved oil galleries
- Zero kilometres — no unknown history, no wear
- Hot tested with QR video proof on every engine
- Heat tabs fitted for transparent warranty coverage
- 1-year warranty standard, 2–3 year Platinum available
- No exchange required — keep your old engine
The old way
Reconditioned / used
A worn core with new seals and gaskets — the internals, and the history, are whatever they are.
- Unknown kilometres, service history and prior abuse
- Original worn internals retained under new gaskets
- Rarely tested before sale — you're the test
- Core charges and exchange units required
- Typical warranty: 3 months, if any
- Early failures inherit the old engine's problems
Before you fit it
Plan the job around the whole vehicle
A new engine only lasts if the reason the old one failed is fixed. Your mechanic should check these before fitting.
Find the original cause
Overheating, cooling faults, blocked intakes or fuel issues that killed the old engine will kill the new one too. Diagnose and fix them first.
Check the parts you reuse
Radiator, hoses, injectors, turbo, intercooler and sensors carried over from the old engine should be inspected, cleaned or replaced.
Follow the fitting requirements
Fitted by a qualified mechanic with a tax invoice, correct fluids and a proper first start-up. This keeps your warranty active.
From our warehouse
To your workshop
Delivered NZ-wide
Crated for heavy freight and shipped fully insured and tracked to your door or workshop anywhere in New Zealand.
No surprise fees
Prices are in NZD excluding GST. NZ Customs collects GST and entry fees when the engine arrives, so there's one payment to us and one to Customs.
Real support. Written cover.
A 1-year written warranty handled by our own team, plus 7 days to arrange a return on unused engines.
Before you buy
Engine replacement FAQs
Not sure this is the right engine? Send us your VIN or engine code and we'll confirm fitment before you pay.
Is this engine brand new?
Yes. Built from new components only — not reconditioned, not second-hand, zero kilometres.
What's included with the engine?
This is a long block. Accessories such as the turbo, injectors, pumps, sensors and manifolds are transferred from your existing engine unless listed otherwise. Check the description or ask us if unsure.
Will I pay GST or customs fees on delivery?
Yes. Prices are in NZD excluding GST. When the engine arrives, NZ Customs collects 15% GST plus an import entry transaction fee and biosecurity levy (around NZ$172 combined) before it is released. Engines are duty-free. You pay those charges directly to Customs, not to us.
How long does delivery to New Zealand take?
The estimated delivery window is shown next to the Add to cart button. We'll send tracking as soon as your engine is dispatched.
How does the warranty work?
1-year warranty covering manufacturing and assembly faults, with 2 and 3-year Platinum cover available. Installation by a qualified mechanic with a tax invoice is required to activate cover.
Do I need to send my old engine back?
No. No core charge and no exchange — keep or sell your old engine.
Fitment check
Get it right the first time.
Send us your VIN or engine code and our team will confirm the exact engine for your vehicle — before you pay.