YAMAHA 90 HP F90LB OUTBOARD MOTOR

Description

This is a Yamaha F90LB for sale: a brand new 90 horsepower Yamaha four-stroke with the 20 inch shaft, still in its factory crate, ready to ship to wherever your boat is. If you came here because your old 90 is tired, or you are fitting out a new hull and want a motor you can forget about, keep reading. I will give you the specs, tell you which boats it suits, and explain how to order it from us.

Quick version for the busy people: 90 HP, 1.8 litre inline four, fuel injected, 353 pounds, mechanical remote controls, power trim and tilt. We ship it worldwide. Message us for a delivered price.

Yamaha F90LB Specifications

Every Yamaha F90LB for sale on this page matches that sheet. Nothing used, nothing rebuilt.

Why the F90 Is Such a Popular Motor

The 90 HP class covers an enormous number of boats. Aluminium fishing boats, small centre consoles, bay boats, pontoons, ski boats, tenders on bigger yachts, workboats. Yamaha’s answer for all of them is the F90, and it has been a strong seller for years.

The reason is pretty simple. Yamaha took a 1.8 litre block, which is big for a 90, and gave it a single overhead cam with four valves per cylinder. Bigger displacement means more torque at low rpm. You feel it when you push the throttle forward with a full boat. The motor does not have to wind up to get going. It just pulls.

The other big thing is weight. At 353 pounds, the F90 is light for a four-stroke of this size. That matters on smaller boats where a heavy motor makes the stern squat and slows everything down. A lot of people looking for a Yamaha F90LB for sale are replacing an old two-stroke, and the F90 is close enough in weight that the boat still sits and runs the way it used to.

What the Letters Mean

Yamaha model codes look confusing at first, but they are easy once you know the pattern. F means four-stroke. 90 is the horsepower. L means a 20 inch shaft. B is the version, so this is the newer generation of the F90 with mechanical controls.

If you see an F90XB, that is the same motor with a 25 inch shaft. An F90JB is the jet version for shallow rivers. A VF90 is the V MAX SHO version, tuned for bass and flats boats. We carry all of them, but the Yamaha F90LB for sale here is the standard 20 inch model, the one most boats need.

Boats That Suit a 90

Here is where the F90 gets hung most often:

• Aluminium V-hull fishing boats, 16 to 18 feet
• Small centre consoles and skiffs
• Pontoons around 18 to 22 feet that see light to moderate loads
• Bay boats and flats boats with a 20 inch transom
• Yacht tenders and RIBs
• Workboats and survey boats that run in sheltered water

Before you order, look at the capacity plate. If it says 90 HP or more and the transom is around 20 inches high, a Yamaha F90LB for sale from us will fit. Measure from the top of the transom to the bottom of the hull at the centre. 20 inches means L. Around 25 means you need the X shaft. If you are not sure, send us a photo and we will help.

On the Water

I will tell you how this motor feels, because specs only tell part of the story. It starts on the first turn. It idles quietly, smooth enough that you can talk normally at the back of the boat. Push the throttle and there is no hesitation. On a typical 17 foot aluminium boat with two people and gear, it gets on plane quickly and cruises easily.

Top speed depends on the boat and the prop, so I will not throw a number at you. What I can say is that most owners who switch from an older 90 are surprised by how much stronger the F90 feels in the mid range. That 1.8 litre block makes a difference when you are crossing a chop with a load on board.

Noise is low. Smoke is zero. The smell of an old two-stroke is gone. If you fish or cruise with family, that alone makes the switch worth it. It is also why the Yamaha F90LB for sale is often the first motor people look at when they want a quieter boat.

Fuel Use

Fuel injection keeps the F90 efficient. It burns what it needs and no more. At cruise it uses a lot less fuel than an old carbureted motor of the same power. Exact numbers change with every hull and prop, so the best thing to do is run it for a few weeks and note your usage.

A few habits help. Trim the motor out a little once you are on plane so the bow lifts and the hull drags less. Find a cruise rpm where the boat runs flat and smooth and stay there. Keep the hull clean, because growth on the bottom costs more fuel than most people realise. Do these and the Yamaha F90LB for sale here will be one of the cheapest motors you have ever owned to run.

Charging and Electronics

The F90 has a 35 amp alternator. That is enough for a typical setup: a fish finder, a GPS, a radio, nav lights, a bilge pump and a livewell. If you run a lot of extra gear, like a big trolling motor charger or several screens, think about a second battery and a switch so your starting battery is always charged.

Yamaha also offers variable trolling rpm on the F90 with a compatible gauge. You can bump the idle speed up or down in small steps without touching the throttle. If you troll for fish, it is very handy. Ask for it when you rig your Yamaha F90LB for sale and set it up from day one.

Choosing the Right Prop

The prop decides how well the motor and the boat work together. You want the motor to reach somewhere in its full throttle range, 5,000 to 6,000 rpm, with your normal load. If it falls short, drop the pitch. If it runs past the top of the range, go up in pitch.

For aluminium fishing boats and pontoons, an aluminium prop is fine and cheap to replace if you hit a rock. On faster boats, a stainless prop gives better bite and holds its shape. Yamaha’s official propeller guide is a good place to start. Or just tell us your boat details and we can suggest one and ship it with your Yamaha F90LB for sale order.

Rigging

Because the F90LB uses mechanical controls, rigging is straightforward. You need a Yamaha mechanical control box, throttle and shift cables, a wiring harness, a key switch or start panel, a gauge, steering and a fuel line with a filter. If you are swapping out an older Yamaha, a lot of the existing parts may still be usable. A good mechanic will tell you what to keep and what to replace.

Have a Yamaha dealer or qualified marine mechanic do the install. They will set the motor height, check the steering, set up the controls and run the motor in the water before you take it out. It is money well spent, and it keeps your warranty options open. Warranty terms depend on the country where the motor is registered, so ask your local dealer.

Break-in and First Service

New motors need a gentle start. Yamaha’s break-in for the F90 is ten hours. Keep it at low to moderate speeds at first, vary the rpm, and avoid long periods at full throttle. The owner’s manual in the crate lays out the exact steps.

After the break-in, do the first service. Change the oil and filter and the gear lube. That first oil change takes out the bits of metal that come from new parts wearing in. People who skip it are taking a risk with a motor they just paid good money for. Treat your Yamaha F90LB for sale purchase right from the start and it will pay you back.

Looking After It Long Term

Here is a simple routine that keeps an F90 in good shape:

• Fresh water flush after every trip, especially in salt.
• Oil and filter change once a season or at the hours in the manual.
• Gear lube change every season. Check it for water.
• Water pump impeller every few seasons, or sooner if you run in sand or silt.
• Anodes checked often and replaced when worn.
• Fuel filters changed on time, and fuel stabiliser if the boat sits.
• Grease on all the fittings and the steering.

That is it. Most of it takes a few minutes. Owners who stick to it get many years from their F90, and when they do eventually sell the boat, a well-maintained Yamaha holds its value. That is something worth thinking about when you compare a Yamaha F90LB for sale with a cheaper brand.

F90LB or Something Else?

Some buyers go back and forth between a few options. Here is my honest take.

F90LB vs F90XB. Same motor, different shaft. Pick based on your transom height. If it is 25 inches, go with the Yamaha F90XB.

F90LB vs VF90 SHO. The V MAX SHO 90 is tuned for speed on bass and flats boats. If you want top end on a light, fast hull, it is a good choice. For an all-round fishing or family boat, the standard F90 is the better buy.

F90LB vs F115. If your boat is rated for 115, more power is nice to have, especially on a heavier boat. The VF115 V MAX SHO is one option. But if your boat runs well with a 90, a 115 just costs more to buy and more to run.

F90LB vs F150. Only if the boat is rated for it and you need the power. The Yamaha F150LB is a great motor, but it is a lot heavier.

For most people with a boat in the 16 to 20 foot range, the Yamaha F90LB for sale here is the right answer.

Who Buys This Motor From Us

We sell F90s to private owners repowering a family boat, to fishing guides, to marinas and boat dealers, to tour operators and to small commercial users. Some buy one. Some buy five. If you run a fleet, keeping every boat on the same model makes life easier. You only stock one set of filters, impellers and props, and your mechanic gets to know the motor inside out.

If you want to see what other customers think, have a look at our reviews. And there is a bit more about us on the about page.

How to Order

1. Go to our contact page.
2. Tell us you want the Yamaha F90LB for sale, how many, and where you are.
3. We send a delivered price, including the crate and shipping.
4. You confirm and pay.
5. We ship with FedEx, UPS or USPS and send you tracking.

That is the whole process. If you have questions along the way, just ask. Before you order, you can read our refund and return policy and terms and conditions.

Worldwide Shipping

We ship to buyers all over the world, from the Americas and the Caribbean to Europe, Africa, the Middle East, Asia and the Pacific. The F90 travels well in its factory crate. At 353 pounds it is a manageable size to ship, and it fits a standard freight crate.

Import duties and taxes are set by your country, not by us. It is a good idea to check with your customs office or a local broker so you know what to expect. When the motor arrives, inspect the crate. If anything looks damaged, take photos before you sign. In practice most deliveries arrive without a scratch, but it is the right habit.

Many of our overseas customers order the Yamaha F90LB for sale with props, controls and spare filters so they are not stuck waiting for small parts after the motor lands. It is worth considering if Yamaha parts are hard to get where you live.

Salt Water Use

Yamaha builds the F90 for salt. The aluminium alloy is designed to resist corrosion, the paint is multi-layered, and there are sacrificial anodes on the bracket and the lower unit. Stainless fasteners are used where it counts.

The owner still needs to help. Flush after every salt run. Rinse the outside. Check anodes. Keep the motor tilted up when moored so the gearcase is not sitting in salt for days. Spray electrical plugs with a corrosion inhibitor from time to time. Do that and the Yamaha F90LB for sale here will look and run well for a long time.

A Note on Older F90 Models

You will see used F90s on the market, and some of them are good motors. But a used motor comes with unknowns. How many hours does it really have? Was it flushed? Was it run in salt? Was the oil changed? A new motor takes all of that out of the question. You know it has zero hours, you know it has never been run without water, and you get the full manual and paperwork. The price difference between a tired used 90 and a new Yamaha F90LB for sale is often smaller than people expect once you add up the work an older motor might need.

Common Questions From First-Time Buyers

We get a lot of first-time buyers, so here are a few of the things they ask most.

Do I need a dealer to install it? You do not legally need one, but we strongly suggest it. A proper install and break-in is the best start you can give the motor.

Will it fit my old controls? If your old controls are Yamaha mechanical, probably yes, but cables may need replacing. If they are from another brand or digital, plan for new controls.

Can I run it on any fuel? Use good quality fuel at the octane listed in the manual. Avoid fuel that has been sitting for months. Use a water-separating filter.

What battery do I need? The manual lists the minimum cranking rating. Use a good marine starting battery that meets or beats it.

If your question is not here, ask us directly. We are happy to help before you buy a Yamaha F90LB for sale, not just after.

More Yamaha Outboards

Want to compare? See the full 90 HP Yamaha range, the wider Yamaha outboards page, or the full shop. For buying tips and maintenance guides, check the blog. Yamaha’s official outboard site also has good background on the F90 family.

Repowering an Old Boat With an F90

A lot of the people who ask about the Yamaha F90LB for sale own a boat that is fifteen or twenty years old with a hull that is still solid. The motor is the weak point. Maybe it is an old two-stroke that smokes and floods. Maybe it is a four-stroke that has seen too many hours. Either way, the boat deserves a better engine, and a repower costs far less than a new boat.

Before you buy, have a look at the transom. Push on it and look for soft spots, cracks around the bolt holes or water weeping out. A new motor on a rotten transom is a bad idea. If the transom is sound, you are good to go.

Next, check the steering. Old cable steering can be stiff and worn. Hydraulic steering is nice to have on a 90 and makes the boat easier to drive. Check the fuel tank and the fuel lines too. Old tanks can hold water and dirt, and that is the last thing you want going into a new fuel-injected motor. Replace old lines and fit a fresh water-separating filter when you hang the Yamaha F90LB for sale from us.

Gauges are another one. Old analogue gauges from a different brand will not talk to the F90. A Yamaha digital gauge gives you rpm, trim, hours, fuel flow on some setups and warning alerts. It is worth fitting one with the new motor.

Do all that and you will have a boat that feels almost new. Owners tell us the repower is the best money they ever spent on an older boat. The difference in noise, smoke, starting and fuel use is huge. If you want a quote for the Yamaha F90LB for sale plus the rigging parts, send us the details and we will price the lot.

Using the F90 on a Pontoon

Pontoon owners make up a big share of our F90 buyers. On a two-tube pontoon from about 18 to 22 feet, a 90 gives you a comfortable cruise, enough power to pull a tube for the kids, and low fuel use on long, slow days on the lake. The 20 inch shaft fits most pontoon transoms, but check yours first.

If your pontoon is heavy or you often carry a full load of people, look at the prop. A lower pitch helps the motor reach its rpm with weight on board. Some owners run a four-blade prop on pontoons for better grip and smoother turns. Ask us and we will suggest something that suits the Yamaha F90LB for sale and your pontoon.

Tritoons usually want more power, so if you have three tubes and lots of passengers, a 115 or 150 might suit you better. Tell us what you have and we will be honest about which motor fits.

Frequently Asked Questions

Is this Yamaha F90LB new?

Yes. Every Yamaha F90LB for sale we list is brand new and comes in the factory crate.

What is the shaft length?

20 inches, the L shaft.

How much does it weigh?

353 lb, or 160 kg.

Does it use digital controls?

No. The Yamaha F90LB for sale here uses mechanical remote controls.

Is it fuel injected?

Yes, electronic fuel injection.

Do you ship worldwide?

Yes, with FedEx, UPS and USPS. Tell us your country and we will give you a delivered price.

Can I order props and controls too?

Yes. Add them to your message and we will quote everything together.

Ready When You Are

If the Yamaha F90LB for sale on this page is the right motor for your boat, the next step takes two minutes. Send us your country and how many motors you need. We will reply with a delivered price and get it moving as soon as you confirm. It is a proven, light, strong 90 that will give you years of easy running.