John Deere marine · Independent specialists · Melbourne
John Deere marine service, brought to your berth.
PowerTech 4045, 6068, 6090 and 6135, in trawlers, launches and working boats. Serviced to John Deere’s schedule by independent specialists, with a clear rundown of what’s urgent and what can wait.
- Independent John Deere specialists
- Servicing Melbourne boats since 1995
- At your berth across Port Phillip Bay
- Twin Disc dealer & ZF Service Point
Your setup
Which John Deere setup do you have?
John Deere marine engines work in trawlers and launches as well as charter, fishing and work boats, usually on a shaft through a marine gearbox. Pick the one closest to your boat, or see what we look after behind the engine.
You’ll find John Deeres in displacement trawlers, launches and expedition yachts, often a single engine doing long, steady hours. We service the engine and its sea water side together.
- Engine oil and filter
- Fuel filters, water drained
- Sea water pump impeller
- Heat exchanger and aftercooler cores
- Zinc anodes
- Cooling system pressure test
- Belt and tensioner check
- Crankcase vent filter
What you get
You’ll know exactly where your engine stands.
Every service ends with a plain-English rundown. Each item is marked done, keep an eye on, or needs attention, so you can see what’s urgent and what can wait. Anything beyond the service is quoted first.
- A separate record for each engine and gearbox
- Kept for your survey, insurance and resale history
- What’s due next, so you can plan around the season
Under factory warranty?
If your John Deere is still under its factory warranty, check the terms for what they say about servicing, parts and records, and tell us when you book. If the terms send any work to an authorised John Deere service partner, we’ll tell you which items before we start. Either way, we record every visit. Your rights under the Australian Consumer Law apply in addition to these terms.
Service rundown
Single 6068 · Shaft drive · 2,400 hours
- Done
Engine oil and filter
- Done
Fuel filters
Replaced. A little water drained.
- Done
Sea water pump impeller
Replaced. Two vanes cracked, all pieces found.
- Done
Heat exchanger core
Cleaned. Light scale.
- Done
Zinc anodes
Renewed.
- Keep an eye on
Coolant pump weep hole
Small weep as it cools, which John Deere says is normal. Recheck next service.
- Done
Gearbox oil
Clean, no sign of water.
- Needs attention
Exhaust mixing elbow
Rust weeping at the flange. Quoted to replace.
Something not right?
Signs your John Deere wants attention.
Many problems give a warning first. If you’ve noticed one of these, it’s worth a look before it turns into a lost weekend, or a lost day’s work.
Running hot
John Deere’s list runs from low coolant and a stretched belt to a faulty sea water pump or impeller, a plugged heat exchanger or a thermostat. On keel-cooled boats it includes marine growth on the keel cooler tubes. Fine at idle but hot under load commonly points to the sea water side.
A drip from the sea water pump
John Deere says to check the pump’s weep hole for water or oil, a sign the seals are leaking, and have the leak repaired. Caught early, it’s a pump reseal rather than a bigger problem.
Hard starting or long cranking
John Deere’s list includes air, water or dirt in the fuel, a clogged filter and dirty injectors, as well as a starter turning too slowly. On 4045s and 6068s, air in the fuel is a common culprit.
Down on power
The usual suspects are air or fuel restrictions, injectors and the turbo, but John Deere also lists a damaged propeller and marine growth on the hull. A sea trial with the right readings tells us which.
Smoke you haven’t seen before
John Deere links black or grey smoke to a clogged air cleaner, dirty injectors, a turbo problem or an overloaded engine, and white smoke to an engine running too cold, a faulty thermostat or injection nozzles.
A water-in-fuel warning
Water settles in the bottom of the fuel filters, and John Deere’s daily checks include draining it. If the warning keeps coming back, find where the water is getting in before it does damage.
Timing
Book around the boating season.
A little planning means the boat is ready on the first good weekend, not the third.
78%
of maritime incidents reported in Victoria in 2024–25 were vessel breakdowns, most of them engine failure or running out of fuel.
Source: Safe Transport VictoriaAugust to October
Pre-season service
Book before the rush. November to Easter is our busiest period, so a service in late winter or early spring has the boat ready for the first good weekend.
Book a pre-season serviceNovember to Easter
On the water
Peak boating, and our busiest months. If an alarm won’t clear or something doesn’t feel right mid-season, call us.
Easter to July
Bigger jobs
The best time for higher-hour services, cooling system work, gearbox work and haul-outs, with the least boating missed.
Who you're dealing with
Independent John Deere specialists, looking after Melbourne boats since 1995.
We’re not a John Deere dealer. We’re an independent marine workshop that services and repairs John Deere engines at your berth or in our Spotswood workshop, with genuine or quality aftermarket parts.
- Independent, not a John Deere dealer
- Genuine or quality aftermarket parts
- Authorised Twin Disc dealer and ZF Marine Service Point
- Also authorised for Volvo Penta and Yanmar
John Deere marine engines we service, old and new
The model code on the engine plate tells you the engine. In 6068SFM85, 6 is the cylinder count, 068 the 6.8 litres, S means the charge air is cooled by sea water, M is marine and 85 marks an emissions-regulated engine, where a 50 is not. Send us the full code and serial number when you book.
John Deere engines are fitted, as standard or as an option, to boats like the Tideways 36 launch built in Sorrento and Nordhavn 52 and 68 expedition yachts, and to Australian-built trawlers like the Tasmanian steel Noble Tasman 44. They’re used in repowers too, like a Halvorsen Island Gypsy 44 that swapped its Ford Lehman power for a 4045. Some of these boats were built with other engines, so check the engine plate.
Questions
What John Deere owners ask us
How much does a John Deere service cost?
It depends on the engine, whether you have one or two, and what’s due on its schedule. We confirm all of that and give you a clear quote before any work starts.
Are you a John Deere dealer?
No. We’re an independent marine workshop. We service and repair John Deere engines with genuine or quality aftermarket parts, and we’re an authorised Volvo Penta, Yanmar and Twin Disc dealer, and a ZF Marine Service Point.
Do I need to bring the boat to you?
No. We service John Deere engines at the berth or on the hardstand around Port Phillip Bay. Bigger jobs come into our Spotswood workshop or are done during a haul-out.
How often does a John Deere need servicing?
On current 4.5 and 6.8-litre PowerTech marine engines, John Deere’s manual sets the oil and filter change at 250 hours with other approved oils, or 375 hours on a propulsion engine using John Deere Plus-50 oil, filters and low-sulphur fuel, and at least once every 12 months either way. Fuel filters and the sea water pump impeller are due every 500 hours or 12 months. Older engines and other sizes have their own manuals, so we work to the one for your engine.
Which John Deere do I have?
The engine plate carries a model code like 6068TFM50 or 6090SFM85, which gives us the size, how the charge air is cooled and whether it’s emissions-regulated. Send it with the serial number when you book. Older boats may have an 8.1-litre 6081 or 12.5-litre 6125.
Is my engine keel-cooled?
John Deere offers its marine engines keel-cooled or with a heat exchanger. A keel-cooled engine circulates its coolant through pipes outside the hull instead of pumping sea water through the engine. Tell us which you have, or we’ll check when we visit, since the cooling side of the service is different for each.
How do I book?
Use the booking form at the top of this page or call (03) 9399 5888. We aim to reply within 1 business day.
Ready when the weather is.
Tell us about your John Deere and where the boat is, and we’ll take it from there.
Mariner Engineering is an independent marine service and repair provider and is not an authorised dealer of, or affiliated with, John Deere. John Deere and associated model names are trademarks of their respective owners, used here only to describe the engines we service.