Yamaha 350 HP LF350UCC Outboard Motor

Description

We have a new Yamaha LF350UCC for sale, the counter-rotating version of Yamaha’s 350 horsepower 5.3 litre V8 outboard on a 30 inch shaft, with digital controls. It ships crated and we deliver to customers in many countries. If you run twin, triple or quad F350s on a big offshore boat with a 30 inch transom or bracket, this is the motor that turns the other way.

The “L” at the front of the model code means counter-rotation, or left-hand prop rotation. On multi-engine boats, using both rotations cancels out the sideways push of the props. The boat runs straight, handles evenly in both directions and backs up the way you expect. Get the rotations wrong and the boat fights you all day.

This page covers who needs the LF350UCC, where it goes on the transom, matching, specs, rigging, care and ordering. For anything else, ask us.

Yamaha LF350UCC for Sale: Key Facts

• New Yamaha LF350UCC V8 outboard
• 350 hp from a 5.3 litre V8
• Counter-rotation (left-hand prop)
• 30 inch ultra-long shaft
• Digital electronic throttle and shift
• EFI, electric start, power trim and tilt

If your boat needs a counter-rotating 350 on a 30 inch shaft, the Yamaha LF350UCC for sale is the engine for that position.

Specifications

Main figures for the Yamaha LF350UCC for sale on this page:

Where Does a Counter-Rotating Engine Go?

On most twin outboard boats, the standard rotation engine is on the starboard side and the counter-rotating engine is on the port side. The props turn outward at the top. On triples, a common setup is counter-rotation on port, standard in the centre and standard on starboard, though some builders specify differently. On quads, two of each are arranged symmetrically.

Always follow your boat builder’s specification. If you are replacing an engine, check which rotation is on that position now. The label on the engine bracket shows the model code, and an L at the front means counter-rotation.

Matching Your Engines

• Horsepower: all 350
• Shaft length: all 30 inch on a 30 inch transom or bracket
• Controls: all digital
• Version: ideally all the same. This is the UCC version. If your other engines are UCC2, look at the Yamaha LF350UCC2.
• Props: same size and pitch, correct rotation for each engine

The standard rotation partner for the Yamaha LF350UCC for sale is the Yamaha F350UCC.

Left-Hand Props

A counter-rotating engine needs a left-hand propeller. A standard right-hand prop will not work. Buy props for multi-engine setups as matched sets: same diameter, same pitch, correct rotation for each position. Yamaha offers props in both rotations for large engines.

Boats That Use It

• Offshore center consoles from about 32 to 45 feet
• Sportfishing and tournament boats
• Express cruisers
• Large catamarans with 30 inch transoms
• Commercial, patrol and rescue boats

The V8 Advantage

The 5.3 litre V8 delivers big torque at modest rpm. Heavy offshore boats plane easily, hold speed in rough water and carry big loads without the engines straining. That relaxed way of making power helps explain the F350’s long service life in demanding use.

Digital Controls

Digital throttle and shift give a light lever and clean shifts across long helm-to-transom distances. On multi-engine boats the binnacle can synchronise the engines. Yamaha’s digital gauges and compatible displays show fuel flow, trim, hours, voltage, temperature and alarms for every engine.

Rigging

1. Yamaha digital control binnacle for the number of engines
2. Digital harnesses and hubs
3. Start/stop panels
4. Digital gauges or compatible displays
5. Hydraulic steering for multiple large outboards, with tie bars
6. Independent fuel feeds and water separating filters
7. Cranking batteries for each engine plus house batteries
8. Matched props with correct rotations

Use a rigger with experience installing big Yamaha engines.

Running Costs

Use the octane in the owner’s manual, usually 89. Fresh fuel, no more than 10 percent ethanol and good water separating filters on each engine.

Maintenance

• Oil and filter every 100 hours or yearly
• Gear oil
• Fuel filters and separator elements
• Spark plugs as needed
• Anodes
• Grease fittings and tie bars
• Water pump impellers on schedule

Service all engines together and flush after salt water.

Break-in

Follow the owner’s manual. Vary throttle and change oil after break-in.

The F350 Range

• Yamaha LF350UCC for sale (this one): 30 inch, counter-rotation
• Yamaha F350UCC: 30 inch, standard
• Yamaha LF350UCC2: 30 inch, counter, later version
• Yamaha LF350XCC: 25 inch, counter

See everything in our 350 HP Yamaha section.

Ordering

Condition

New in the factory crate. Photos on request.

Shipping

Worldwide with FedEx, UPS and USPS, crated and tracked. We can ship matched sets together. Ask for a delivered price.

Payment

Order through our shop or ask for an invoice.

Delivery

Inspect the crate before signing. See our refund and return policy and terms.

Warranty

Depends on the country of registration and use. Ask before ordering the Yamaha LF350UCC for sale and we will confirm in writing.

Read our reviews or learn more about us.

More From Yamaha

See Yamaha Motor Canada’s F350 page and the Yamaha Outboards website.

Why Counter-Rotation Matters So Much on Big Boats

Every propeller produces a sideways force called prop walk as well as forward thrust. On a small single engine boat you hardly notice it. On a big boat with two or more 350 hp V8s, those sideways forces are large. If all the engines turned the same way, the boat would pull hard to one side, the steering would feel heavy and slow speed handling would be unpredictable.

Mixing standard and counter-rotating engines balances everything out. With the Yamaha LF350UCC for sale on one side and a standard F350UCC on the other, the forces cancel. The boat runs straight with little steering input, turns equally well both ways and backs up cleanly. That balance also means less wear on the steering system and less effort for the skipper over a long day.

Handling Multi-Engine Boats

With digital controls, multiple F350s give you a lot of control at low speed:

• Pivoting: one engine forward, the other reverse, and the boat turns in its own length.
• Walking sideways: combine opposite shifts with a little helm to push the stern toward a dock.
• Holding position: small bursts on each engine hold the boat steady in wind or current.
• Synchronised cruising: keep rpm matched at cruise for efficiency and smooth running.
• Getting home: if one engine fails, tilt it up and run home on the others.

Some boats also add joystick docking, which makes even very large outboard boats easy to handle in tight marinas. Practise in open water before trying tight spots.

Fuel Layout

Each engine needs its own fuel line and water separating filter. Independent filtration means one clogged filter only affects one engine. Check that fuel lines and tank vents are big enough for multiple V8s at cruise. Carry spare filters on long trips.

Replacing One Engine From a Set

A lot of buyers need a Yamaha LF350UCC for sale to replace one engine from a twin or triple set. If the remaining engines are healthy UCC versions with similar hours, replacing just the one usually works well. Keep the props matched and service all engines together from then on.

If the remaining engines have very high hours or are different versions, replacing all of them might be better long term. Send us the model codes, serial numbers and hours of the engines you are keeping and we will give you an honest opinion.

Electrical Setup

Give each engine its own cranking battery, add a house bank for electronics, and protect the cranking batteries with switches or relays. Size cables correctly, keep connections clean and tight, use dielectric grease on digital plugs and keep accessories off the engine harnesses. Most electrical problems on big boats come from batteries and connections rather than the engines.

Offshore Planning

• Use the rule of thirds for fuel
• Track real consumption on the display
• Carry spare filters, prop hardware and tools
• Carry communications and safety gear
• Check the weather and file a float plan

Salt Water Care

• Flush every engine after each trip
• Rinse cowlings, brackets, trim rams, steering and tie bars
• Check anodes often
• Spray powerheads with corrosion protectant
• Wax cowlings twice a year

Transom and Bracket Strength

Multiple F350s add a lot of weight to the stern. Make sure the transom or bracket is rated for it, inspect it carefully on repowers, use the specified hardware and backing plates, seal every hole and re-check bolts after the first few trips and at every service.

A Day on Twin F350s

Here is a typical offshore day on a 35 foot center console with a Yamaha LF350UCC for sale on the port side and a standard F350UCC on starboard.

You start the engines before dawn. They idle quietly while the crew loads up. With gentle shifts you walk the boat out of the slip, using the opposite rotations to pivot cleanly. Outside the harbour you push both levers forward. Sync matches the engines, and the boat settles into a fast cruise, tracking straight with almost no steering input.

The sea is lumpy, but the 30 inch legs keep the props deep. At the grounds you troll for hours, the V8s idling smoothly. In the afternoon you head home into a building breeze. Back at the dock you pivot into the berth and flush both engines. Long day, no surprises.

Common Mistakes

• Putting the counter-rotating engine on the wrong side
• Fitting a right-hand prop to a counter-rotating engine
• Mixing UCC and UCC2 versions without checking
• Wrong shaft length
• Undersized steering, fuel lines or batteries
• Skipping break-in
• Not flushing after salt

Storage

1. Stabilize fuel and run each engine
2. Change oil and filters
3. Change gear oil
4. Grease fittings and tie bars
5. Trim engines down
6. Maintain or disconnect batteries
7. Spray powerheads
8. Cover engines

What Comes in the Crate

The Yamaha LF350UCC for sale arrives with its paperwork. Controls, gauges, steering and props are separate. Note the serial number and keep it safe.

Keeping Records

Log hours, services and parts for every engine. Matching records keep engines in step and help at resale.

Questions to Ask Before Ordering

• Does this position need counter-rotation?
• Is my transom or bracket 30 inches?
• Are my other engines UCC versions?
• Is the boat rated for the total horsepower and weight?
• What is the delivered price?
• Which warranty applies?

Triples and Quads

Larger boats often run three or four F350s. On these setups, getting the rotations right is critical. A common triple arrangement is counter-rotation on the port engine, standard on the centre engine and standard on the starboard engine, although builders vary. On quads, the two port engines are often counter-rotating and the two starboard engines standard. The Yamaha LF350UCC for sale is the counter-rotating engine you need for those positions on a 30 inch transom or bracket.

Triple and quad setups also need careful attention to steering, tie bars and fuel delivery. All engines should be the same version, same shaft length and same control type. Use a rigger who has installed multi-engine Yamaha V8 setups before, and follow your builder’s specification exactly.

Engine Height and Trim

Set the engines at the builder’s recommended height and fine-tune during sea trials. The props must grip in turns and rough water, and the engines should reach 5,000 to 6,000 rpm at full throttle with a normal load. At cruise, trim up until speed stops rising. Keep the bow lower in head seas and slightly higher in following seas.

Gauges and Data

Yamaha’s digital gauges and compatible displays show rpm, trim, fuel flow, hours, voltage, temperature and alarms for every engine. A clear engine page on your chartplotter helps you spot issues early and plan fuel accurately. With several big engines running, that information is invaluable.

Choosing Props for Counter-Rotating Engines

Prop choice on big multi-engine boats deserves care. Most F350 setups use 3 or 4 blade stainless props. Four blades usually grip better in rough water and help the boat plane at lower speeds, while three blades can give a bit more top speed. Whatever style you choose, every prop on the boat should be the same size and pitch, with the right rotation for each engine. The Yamaha LF350UCC for sale needs left-hand props.

Test props during sea trials so all engines reach the correct rpm range with a normal load. Note the sizes and carry spares in each rotation on long trips. Replace damaged props promptly, because a bent blade on one engine causes vibration and uneven performance across the whole set.

Bracket Boats

Many big center consoles mount their engines on a bracket behind the transom. Brackets move the engines aft, can improve the ride and free up cockpit space. They often call for 30 inch shafts like the Yamaha LF350UCC for sale. If your boat has a bracket, measure from its mounting surface, inspect its structure and attachment carefully and check your builder’s specification before ordering.

Why Buy From Us

When you order the Yamaha LF350UCC for sale here, we help you confirm rotation, shaft length and version before you pay. You get a delivered price in writing and a clear answer about warranty in your country. Photos of the crate and label are available on request, and we stay in touch after delivery.

Understanding the Model Code

For the Yamaha LF350UCC for sale: L means counter-rotation, F means four stroke, 350 is the horsepower, U is the 30 inch shaft and CC marks the digital control version. Drop the first L for the standard rotation partner, the F350UCC. Swap U for X for the 25 inch motor. A 2 at the end marks a later production version. Knowing the code makes it easy to check that every engine on your boat matches.

Repowering

Many older offshore boats with large two strokes or early four strokes are repowered with F350s. You gain economy, much quieter running, digital controls and detailed engine data. Before ordering, check transom or bracket strength, capacity ratings, steering, fuel delivery, electrical capacity and helm space for the digital binnacle and gauges.

Commercial and Charter Use

Commercial operators often choose F350s for charter, dive, pilot, patrol and survey boats. They like the strong torque, smooth running under load and the engine’s long track record. If you are buying a Yamaha LF350UCC for sale for commercial work, plan service intervals around hours rather than the calendar, stock common parts such as filters, plugs, anodes and impellers, and keep detailed engine logs. Schedule services during quieter periods so boats are available when you need them. Check fuel quality regularly, especially if you buy fuel in different ports.

Year-Round Boats

Many big boats stay in the water year-round. If yours does, run the engines regularly, keep anodes fresh and follow your dealer’s advice on protecting the lower units from marine growth. Flush engines after use where possible and keep the cowlings clean and waxed. If the boat comes out for winter, follow the storage steps above for each engine.

Running a Mixed Fleet

Some operators run several boats with different engine setups. Keeping all F350s in a fleet on the same version simplifies parts stock and training. If you are building a fleet, consider standardising on one version and stocking matched props in both rotations. The Yamaha LF350UCC for sale fits neatly into fleets that already run UCC versions.

Is the Yamaha LF350UCC for Sale the Right Engine?

The Yamaha LF350UCC for sale is right for you if your boat runs two or more F350s on a 30 inch transom or bracket, the position you are filling needs counter-rotation, and your other engines are the UCC version with digital controls. It is also right if you are building a new multi-engine setup and want the UCC version throughout.

It is not the right engine for a single-engine boat, which normally uses standard rotation. It is not right for a 25 inch transom, where you would need the LF350XCC. And if your other engines are UCC2 versions, the LF350UCC2 is a better match.

Not sure which applies to you? Send us photos of the labels on your current engines and a photo of the transom. We will tell you exactly which motor to order, whether that is the Yamaha LF350UCC for sale or another model in the range.

Noise and Comfort

Older big two strokes were loud and smoky. Multiple F350s are far quieter, especially at idle and cruise, with no smoke at the dock and no oily smell. On long offshore runs that makes a real difference to crew comfort. You can talk at the helm without shouting, and everyone arrives at the fishing grounds less tired. It is one of the things owners mention most after repowering with F350s.

Planning a Full Repower

If you are replacing all the engines on a big boat, plan the whole job before ordering. Decide on engine version, rotation for each position, shaft length, control binnacle, gauges or displays, steering, fuel system updates, batteries and props. Talk to your rigger about timing, because big repowers can take a while. Then order everything together so the parts arrive at the same time. We can quote matched sets of F350s, including the Yamaha LF350UCC for sale and its standard rotation partners.

Frequently Asked Questions

How long will it last?

With good care, big Yamaha four strokes commonly run thousands of hours, including in hard commercial use.

What fuel does it use?

Unleaded at the octane in the owner’s manual, usually 89, with no more than 10 percent ethanol.

Is the Yamaha LF350UCC for sale new?

Yes, new in the factory crate.

What does the L mean?

Counter-rotation. The prop spins the opposite way to a standard motor.

What do I pair it with?

The standard rotation Yamaha F350UCC.

Does it need a left-hand prop?

Yes.

Do you ship the Yamaha LF350UCC for sale worldwide?

Yes. Ask us for a quote.

Complete Your Setup

If the Yamaha LF350UCC for sale is right for your boat, add it to your cart or contact us about a matched set. Browse all our Yamaha outboards, see the 200 HP range, or read our blog.