If you’ve been searching for a Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale, you already know these three engines aren’t interchangeable with just anything on the market. They’re the same V8 architecture built at three different power levels, and NJ Global Auto Parts keeps all three in stock, tested, cleaned up, and ready to crate the same week you buy. We’re not a listings site pointing you somewhere else — we buy these engines, inspect them ourselves, and ship them out of our own facility to customers all over the world.
This page exists because people shopping for a used Yanmar 8LV rarely know which of the three displacements they actually need until they see the numbers side by side. So that’s what we’re going to do here: real specifications, real pricing context, and a straight answer on why buying used from us beats paying full retail for a new unit that takes months to arrive. Whether you land on the 320, the 350, or the 370, this same Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale listing walks you through everything you need before you commit.
We get calls almost every week from boat owners who found a “great deal” on one of these engines through a private seller, only to discover mid-negotiation that nobody could actually answer basic questions about compression, turbo condition, or gear fluid. That’s the gap we fill. When you’re comparing a private listing against a Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale through us, you’re comparing a guess against a documented inspection.
What You Get When You Buy a Yanmar 8LV Marine Inboard Diesel Engine For Sale Here
Every Yanmar 8LV-320, 8LV-350, or 8LV370 marine inboard diesel engine for sale on our lot goes through the same process before it’s listed. We pull compression numbers, check the turbos for shaft play, inspect the marine gear for leaks, and run the engine on a test stand when the setup allows it. If something’s marginal, we fix it before the engine ships — not after you call us asking why it’s smoking on startup.
That’s the difference between buying from a reseller who’s actually mechanical and buying from someone flipping a boatyard trade-in without opening the valve covers. We’ve had customers tell us they nearly bought a “running” 8LV370 from a private seller for less money, only to find out the aftercooler was internally corroded. We caught that exact issue on a unit we bought last year and rebuilt it before it ever went up for sale.
Yanmar 8LV-320, 8LV-350 and 8LV370 Specifications
All three engines share the same block, the same 90-degree V8 layout, and the same basic footprint. What changes between them is boost pressure, fuel delivery tuning, and the resulting horsepower and torque curve. Here’s how they compare:
| Specification | 8LV-320 | 8LV-350 | 8LV370 |
|---|---|---|---|
| Rated power | 320 mhp | 350 mhp | 370 mhp |
| Rated speed | 3800 rpm | 3800 rpm | 3800 rpm |
| Configuration | V8, 90°, 4-stroke, water-cooled | V8, 90°, 4-stroke, water-cooled | V8, 90°, 4-stroke, water-cooled |
| Displacement | 4.460 L | 4.460 L | 4.460 L |
| Bore x Stroke | 86 mm x 96 mm | 86 mm x 96 mm | 86 mm x 96 mm |
| Aspiration | Twin turbocharged, intercooled | Twin turbocharged, intercooled | Twin turbocharged, intercooled |
| Fuel system | Denso common rail direct injection | Denso common rail direct injection | Denso common rail direct injection |
| Dry weight | ~435 kg (959 lb) | ~435 kg (959 lb) | ~435 kg (959 lb) |
| Dimensions (L x W x H) | 1340 x 880 x 766 mm | 1340 x 880 x 766 mm | 1340 x 880 x 766 mm |
| Marine gear | KMH50A / KMH50V | KMH50A / KMH50V | KMH50A / KMH50V |
| Gear ratios available | 1.67:1 to 2.47:1 | 1.67:1 to 2.47:1 | 1.67:1 to 2.47:1 |
| Alternator | 180 amp standard | 180 amp standard | 180 amp standard |
| Idle speed | 550 rpm | 550 rpm | 550 rpm |
| Emissions | EU RCD 2, IMO, EPA Tier 3 / EPA-C, HVO-approved | EU RCD 2, IMO, EPA Tier 3 / EPA-C, HVO-approved | EU RCD 2, IMO, EPA Tier 3 / EPA-C, HVO-approved |
Full factory documentation for the whole family is published on Yanmar’s official 8LV series page, and their technical datasheet covers the full torque curves and installation drawings if you want to go deeper before you buy.
What Sets the 8LV Platform Apart From Other Marine V8 Diesels
Most marine diesel V8s in this power range are adapted from truck or industrial blocks, which usually means extra weight and a compromise on the marine gear mating. Yanmar designed the 8LV from the ground up as a marine engine, not a repurposed land-based block, and it shows in the packaging. The 90-degree bank angle keeps the whole unit noticeably shorter and lower than most six-cylinder alternatives producing similar horsepower, which is exactly why it fits so well into express cruisers and center consoles where engine room space is already tight before you add a generator and fuel tanks.
The twin-turbo, common-rail fuel system also means cleaner cold starts and a broader usable torque band than older mechanically-injected diesels of similar displacement. Owners moving up from an older inline-six marine diesel consistently tell us the throttle response feels sharper, and that’s not marketing talk — it’s the direct result of Denso’s common rail injection giving the ECU far more control over fuel delivery at every point in the rev range.
Why Buy a Used 8LV Instead of Ordering New
A brand-new 8LV370 from an authorized Yanmar dealer runs well past what most private boat owners want to spend on a repower, and that’s before you factor in install labor, a new wiring harness, and lead times that can stretch six months or more depending on the dealer’s allocation. A used Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale from us gets you the same block, the same reliability record, and a fraction of the wait.
We’re not selling you a mystery engine pulled off a wrecked hull with no history. Every unit gets hour meter documentation when it’s available, a written summary of what we found and fixed, and photos taken during teardown or inspection so you can see exactly what you’re buying before it leaves our shop. That’s a very different experience than scrolling through a classifieds listing hoping the seller is telling the truth about “low hours.”
Where These Engines Actually Get Used
This Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale shows up constantly in sport fishing boats, express cruisers, and center consoles in the 35 to 55 foot range, usually paired up in twin or triple installations. The V8 layout keeps the engine room compact compared to inline-six alternatives at similar horsepower, which matters a lot when you’re trying to fit twin engines plus generators and fuel tanks into a hull that wasn’t designed with unlimited space in mind.
Commercial operators like the 8LV-320 and 8LV-350 for pilot boats, small ferries, and patrol craft where fuel economy matters as much as top speed. The 8LV370 tends to go into performance-oriented sport boats and center consoles where owners want the extra top-end power for running offshore in rough conditions without babying the throttle. We’ve shipped engines for all three of these use cases, and customers routinely ask us which displacement fits their specific hull — we’re happy to talk through that before you commit to a purchase.
We’ve also had a handful of orders from workboat operators repowering older diesels that simply couldn’t meet current emissions rules in their region. Because the whole 8LV lineup is certified to EU RCD 2, IMO, and EPA Tier 3 / EPA-C standards, swapping in a Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale solves both the power question and the compliance question in one move, which matters a lot if you’re operating commercially in waters with strict emissions enforcement.
Common Issues We Find on High-Hour 8LV Engines (And Fix Before Listing)
Nobody selling you a used marine diesel wants to talk about what actually goes wrong with these engines over time, but we will, because it’s exactly why our inspection process matters. The most common issue on a stored or lightly-used 8LV is a raw water pump impeller that’s taken a compression set from sitting — it looks fine until you actually pull it and see the cracked vanes. We replace these proactively rather than waiting for a customer to find out the hard way after installation.
The second most common finding is minor corrosion on the aftercoolers, usually from a cooling system that wasn’t flushed with fresh coolant on schedule. Left alone, this eventually restricts airflow and quietly costs you boost pressure and fuel economy. We pressure-test every aftercooler we come across and rebuild or replace anything that doesn’t hold spec. Turbo shaft play is the third item on our checklist, and it’s the one that scares buyers the most — rightly so, since a failed turbo on either bank can send debris straight into the engine. Every 8LV-320, 8LV-350, and 8LV370 we sell has had both turbos checked and documented before it ever goes up for sale.
How We Prepare Every Engine Before It’s Listed
When a Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale comes into our shop, the first thing we do is a visual inspection for corrosion, oil leaks, and any signs of overheating like discolored paint near the exhaust manifolds. Then we pull the raw water pump impeller and check it, because a chewed-up impeller left in a stored engine is one of the most common issues we find and one of the cheapest to fix if you catch it early.
From there we check compression across all eight cylinders, inspect both turbochargers for shaft play and oil residue at the seals, and drain and inspect the marine gear fluid for metal contamination. If the engine has been sitting for an extended period, we’ll also flush the cooling system and replace any rubber components that have gone stiff or cracked from age rather than actual use. None of this is optional for us — it’s the baseline before an engine gets photographed and listed for sale.
Parts, Maintenance, and What Ownership Actually Costs
One thing we tell every customer up front about a Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale: buying it is the easy part. Yanmar’s dealer network is solid worldwide, so genuine filters, impellers, injectors, and turbo components aren’t hard to source even outside North America or Europe. That’s actually one of the underrated advantages of the 8LV platform compared to some of the smaller, less common marine diesel brands — you’re not stuck waiting on parts shipped from a single warehouse on another continent.
Routine maintenance on these engines follows a fairly standard marine diesel schedule — oil and filter changes on a set hours interval, raw water impeller replacement roughly once a season depending on usage, and periodic checks on the turbo boost hoses and charge air cooler. Because the 8LV series is HVO-approved, owners in regions where renewable diesel is available also have some flexibility on fuel sourcing that older marine diesels simply don’t offer. None of that changes the fact that these are turbocharged, intercooled, common-rail diesels — they reward an owner who keeps up with fuel filtration and doesn’t let the cooling system go neglected.
Budget for that upkeep the same way you would with any Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale, used or new, and it’ll pay you back in reliability for years.
8LV-320 vs 8LV-350 vs 8LV370 — Which One Actually Fits Your Boat
This is the question we get asked more than any other about this Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale. If your hull is on the lighter end of the range these engines get installed in, or if you’re running twin engines and fuel economy at cruise speed matters more than outright top speed, the 8LV-320 is usually the right call. It shares every core component with its bigger siblings, just tuned for a bit less peak output.
The 8LV-350 sits in the middle and is honestly the one we sell the most of, because it splits the difference well for owners who want more headroom than the 320 without chasing the last few knots of top speed that the 370 is built for. If you’re repowering a hull that originally came with a similarly-rated engine, matching the original power band with the 350 is usually the safest bet.
The 8LV370 is for owners who genuinely want the extra power — planing faster, running heavier loads, or just having more margin when conditions turn rough offshore. We’ve sold this one to sport fishing crews who run long distances to the canyons and don’t want to be underpowered when they need to get back in ahead of weather. Whichever one you land on, we keep all three in inventory, so you’re not waiting on us to source a specific displacement.
Shipping Your Yanmar 8LV-320 8LV-350 8LV370 Marine Inboard Diesel Engine For Sale Worldwide
We ship these engines internationally on a regular basis — crated, secured to a pallet, and set up so freight forwarders on either end can handle them without any special equipment beyond a standard forklift. Whether you’re in North America, the EU, the Middle East, Southeast Asia, Australia, or anywhere else with a working port or freight terminal, we can get a Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale to your door or your nearest port.
We handle export documentation for every Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale and coordinate with your freight forwarder directly, so you’re not left guessing about paperwork on your end. If you don’t already have a forwarder, we can point you toward options we’ve worked with before who understand how to handle engine freight without damaging anything in transit. Every engine gets photographed again right before it’s crated so you have a clear record of condition at the point of shipment.
What to Check Before You Buy Any Used Marine Diesel
If you’re shopping around beyond just us, here’s what actually matters on a used 8LV or any comparable marine diesel: ask for compression numbers, not just “it runs great.” Ask whether the turbos have been inspected or replaced, since turbo failure is one of the more expensive surprises on any twin-turbo diesel. Ask about the marine gear condition specifically, since transmission issues get expensive fast on these platforms. And always ask for photos from the actual engine you’re buying, not stock photos pulled from a manufacturer’s brochure.
We’re comfortable answering every one of those questions in detail because we do the inspection work ourselves before anything goes up for sale. If a seller can’t answer specifics about compression, turbo condition, or gear fluid analysis, that’s usually a sign they haven’t actually opened the engine up to look. Use that same checklist whether you’re evaluating a Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale through us or anywhere else — it’s the difference between an informed purchase and an expensive surprise.
Pricing, Warranty, and Getting One On a Truck
Pricing on our Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale reflects hours, condition, and what work has already been done — you can see current listings and exact pricing on each product page linked above. Every Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale we ship comes with a warranty covering the work we’ve done and the core components we’ve inspected, so you’re not buying blind. We’ll walk you through exactly what’s covered before you pay for anything.
Once you’re ready to move forward, we handle crating, freight quotes, and paperwork on our end. Most orders ship within a week or two of payment clearing, depending on freight scheduling to your specific destination. If you need documentation for financing or insurance purposes before you commit, we can put together whatever your lender or insurer needs.
Frequently Asked Questions
Can I buy a single Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale, or do you only sell them in pairs?
We sell these individually. Most of our customers do end up buying two for a twin installation, but plenty of commercial and single-engine applications just need one.
Do these engines come with the marine gear installed?
Yes, our listings include the KMH50 series marine gear already mated to the engine unless a listing specifically states otherwise. We’ll always confirm gear ratio before shipping so it matches your running gear.
How do I know the hour count is accurate?
We document hour meter readings when the engine has one, and we’re upfront when an engine’s history is less certain. Our inspection findings — compression, turbo condition, gear fluid analysis — tell you more about real-world condition than a hour number alone ever could.
Can you ship to a freight forwarder instead of directly to me?
Absolutely, and it’s actually the most common way these engines move internationally. Just give us your forwarder’s details and we’ll coordinate delivery directly with them.
What if I’m not sure which of the three engines fits my boat?
Reach out with your hull’s original engine specs or the make and model of your boat, and we’ll help you figure out whether the 320, 350, or 370 is the right match before you buy anything.
Do you offer financing or payment plans on a Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale?
We can put together documentation to support outside financing or a marine loan through your own bank or credit union, and we’re glad to work with your lender directly on anything they need verified before funding.
Will the engine arrive ready to install, or does it need additional work?
Every Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale ships ready for installation based on the findings in its inspection report. If anything needs attention beyond normal hookup — a specific hose, mount, or wiring adapter for your particular boat — we’ll flag that before the engine ships, not after.
If you’re ready to move forward, browse our current 8LV-320, 8LV-350, and 8LV370 listings, or get in touch and we’ll help you land on the right Yanmar 8LV-320 8LV-350 8LV370 marine inboard diesel engine for sale for your boat. We also keep other marine diesel platforms in stock, including our Caterpillar C18 marine engine for sale, if you’re comparing options across brands before you decide.