HONDA 100 HP BF100A1XRT OUTBOARD MOTOR

Description

A 25 inch transom usually means one of two things: a pontoon, or a boat built to handle rougher water than the average lake runabout. Either way, the motor hanging off the back has more work to do. The Honda BF100A1XRT for sale on this page is Honda’s 100 horsepower four stroke with the extra long 25 inch shaft, and it is one of the best matches I know for that kind of boat. It is new, in the crate, and we ship it worldwide.

Below is everything you need to decide whether it is right for you: the model code, full specs, how it runs, the boats it suits, costs of ownership, installation advice and how ordering works. Price and cart are at the top of the page.

The Short Version

The Honda BF100A1XRT for sale is a 100 HP, 1.5 litre, four cylinder, 16 valve four stroke with VTEC. It has a 25 inch shaft, remote control and power trim and tilt. It weighs 365 pounds dry, charges your batteries at 35 amps, and shares its engine with the BF90 and BF75. For a 100 HP motor on a 25 inch transom, it is about as light and refined as it gets.

Decoding BF100A1XRT

• BF: Honda four stroke.
• 100: horsepower.
• A1: series and type.
• X: extra long 25 inch (635 mm) shaft.
• R: remote control from the helm.
• T: power trim and tilt.

If you actually need 20 inches, the Honda BF100A1LRT is the same motor with the shorter leg. Measure the transom at the centre, from the top down to the bottom of the hull. About 25 inches, and the Honda BF100A1XRT for sale is your motor.

Specifications of the Honda BF100A1XRT for Sale

Check the figures against Honda’s own BF75, BF90 and BF100 page any time.

Why 100 HP Makes Sense on a Pontoon

Pontoons are heavy and they push a lot of water. A 90 will move most mid size pontoons fine, but once you add a full crew, coolers, a grill and maybe a tube behind, a little extra power makes the boat feel much less strained. The Honda BF100A1XRT for sale gives you that reserve without adding weight, because it weighs the same as the 25 inch BF90.

More power also means you can cruise at lower RPM for the same speed. That keeps noise down, which on a pontoon full of people talking and listening to music is a real plus. It is also easier on the engine over the years.

How the Honda BF100A1XRT for Sale Runs

VTEC power

VTEC gives the 1.5 litre engine two personalities. At low RPM it runs a mild cam for smoothness and economy. At higher RPM it switches to a bigger cam and pulls hard. You get the light weight of a small engine with the top end of a larger one.

BLAST hole shot

Push the throttle quickly and BLAST advances ignition timing and enriches the mixture briefly. The boat climbs onto plane quicker, which is especially welcome on a heavy pontoon or a loaded centre console.

Lean Burn economy

An O2 sensor allows the engine to run leaner at steady cruise. Honda quotes up to 20% less fuel at cruise than comparable motors. On long days on the water, that is money in your pocket.

Quiet, smooth four cylinder

Four cylinders and four stroke design make for very little vibration. At idle, the Honda BF100A1XRT for sale is hard to hear over normal conversation.

Boats That Fit the Honda BF100A1XRT for Sale

• Pontoons and tritoons with a 25 inch transom, from about 18 to 22 feet, rated for 100 HP.
• Small centre consoles and bay boats with 25 inch transoms.
• RIBs used for diving, patrol, tender or rescue work.
• Deep-V aluminium boats built for big lakes or coastal water.
• Work and commercial boats with tall transoms.

Honda has published test results for 100 HP setups on boats such as the Highfield DX 540 RIB, the Key West 1720 Sportsman and the Inventech 18. You can see speed, fuel consumption and propeller details on the Honda Marine performance test page.

Check your boat’s capacity plate before ordering. If your pontoon is rated at 90, the Honda BF90D5XRTA is the 25 inch 90. If it is rated for more, the Honda BF115D1XA brings 115 HP with the same shaft length.

Charging for Modern Boats

Modern pontoons and centre consoles carry more electrics than ever: LED lighting, stereos with amplifiers, big screens, livewells, bilge pumps and USB chargers. The Honda BF100A1XRT for sale produces 44 amps, with 35 going to battery charging. That is well above many rivals and keeps you from running flat after a long day.

NMEA 2000 compatibility means engine data can show on a compatible display, cutting down on separate gauges and clutter at the helm.

Maintenance and Running Costs

A good service plan for the Honda BF100A1XRT for sale includes an oil and filter change after break-in, then every 100 hours or once a year. At the same time, change the gearcase oil, check plugs and the fuel filter, inspect anodes and grease the fittings. Inspect the timing belt and water pump impeller at the intervals in the owner’s manual.

Service points are easy to reach, so labour stays low. Honda publishes a full maintenance guide for its outboards, and it is worth a read before your first season.

Salt Water Protection

Many 25 inch shaft boats run on the coast, so corrosion protection matters. Honda uses multi layer paint, sacrificial anodes and waterproof connectors, and places the electrical parts high on the engine. Flush after every salt trip using the built in flush port, check anodes every season, and repair chipped paint promptly. Do that and the Honda BF100A1XRT for sale will handle salt water for many years.

Warranty

Honda offers US recreational buyers a five year warranty that it describes as transferable and non-declining. In other countries, local Honda Marine distributors set the terms. The Honda warranty page explains the details.

Propeller Choice

The Honda BF100A1XRT for sale comes without a propeller. At full throttle with a normal load, aim for 5,500 to 6,300 RPM. Pontoons commonly need lower pitch and sometimes a four blade prop for better grip and less ventilation in turns. Centre consoles and RIBs may take more pitch. Honda’s prop selector is a good starting point.

Ordering the Honda BF100A1XRT for Sale

1. Order through the cart, or contact us with questions first.
2. We confirm stock, your address and the shipping method.
3. The motor ships in its Honda crate with added protection.
4. You receive tracking details.
5. Arrange equipment or people to unload the heavy crate on arrival.

Buyers outside our country pay their own import duties and taxes. We supply all the documents customs will ask for.

See the full Honda outboard motors range, the 100 HP Honda outboards section, or the whole shop.

Installation Advice for the Honda BF100A1XRT for Sale

A professional rigger is the best choice for most people. The job includes mounting, steering, controls, harness, gauges or display, batteries and fuel system with a water separating filter, followed by a water test.

On pontoons, the motor height is often dictated by the transom bracket or pod. Follow the boat builder’s instructions. On V-hulls and RIBs, start with the anti ventilation plate level with or slightly above the keel line, then adjust based on testing.

What You Get in the Crate

The Honda BF100A1XRT for sale arrives complete on its 25 inch leg, with cowling, owner’s manual and Honda’s standard hardware. Controls, harness, gauges or display, battery and propeller are separate, because they depend on your boat. Inspect the crate on delivery and take photos of any damage before you sign.

Break-In and First Service

For the first several hours, vary your throttle, avoid long stretches at wide open throttle and don’t hold one RPM for too long. The owner’s manual gives the exact procedure. After break-in, change the oil and filter and check the gearcase oil. It is a small job that pays off over the life of the Honda BF100A1XRT for sale.

Repowering a Pontoon: Practical Tips

Pontoon repowers are one of the most common jobs for this motor. A few things to think about.

Transom and bracket. Check the mounting bracket or pod for corrosion and cracks, especially on older aluminium pontoons. Replace worn bolts.

Steering. Many older pontoons have tired mechanical steering. A 100 HP motor with a heavy boat can make steering feel stiff. Hydraulic steering is a worthwhile upgrade.

Fuel system. Pontoon fuel tanks are often under the deck with long fuel runs. Replace old hoses, fit a new water separating filter, and check the tank vent.

Wiring. Pontoons collect a lot of accessories over the years. Clean up the wiring, fit a proper battery switch and consider a second battery. The 35 amp charging on the Honda BF100A1XRT for sale can support it.

Weight. Put the battery and fuel where they help balance the boat. Pontoons that are tail heavy plough and burn more fuel.

A Typical Day With This Motor

Load the family, turn the key, and the motor starts instantly. Idle out quietly. Push the throttle and the pontoon rises onto plane without the long, nose-high struggle you get with an underpowered motor. Cruise at a relaxed RPM while everyone chats and the music plays without shouting over the engine. Pull a tube for an hour, then idle into a cove and anchor. Head home as the sun goes down with plenty of fuel left. Flush the motor at the dock. That is exactly the kind of day the Honda BF100A1XRT for sale was made for.

Storage

If you won’t use the boat for a while, change the oil, stabilise the fuel, flush the engine, check the gearcase oil and store the motor trimmed down. In tropical or humid places, keep the cowling on, cover the boat and run the motor every few weeks. Engines that sit unused in heat suffer more than engines that are used regularly.

Mistakes to Avoid

Ordering the wrong shaft length is the big one. Others include exceeding the capacity plate, forgetting controls and harness, hanging a new motor on a damaged transom, never checking wide open throttle RPM, and skipping the first service. Ask us before you order and we will help you avoid all of them with the Honda BF100A1XRT for sale.

Using Trim Well

Trim down for take off, then trim out gradually once on plane until the boat runs freely without bouncing. Trim down into a head sea and slightly up in a following sea. On pontoons, a little trim out lifts the front of the tubes and can add speed and reduce spray. Good trim habits make any boat faster, drier and more economical, and they get the best from the Honda BF100A1XRT for sale.

Getting the Boat Ready While You Wait

International shipping takes time, so use the waiting period to prepare. When the Honda BF100A1XRT for sale lands, you want to be able to bolt it on and go, not start ordering parts. Here is a sensible list.

• Take the old motor off and inspect the transom or bracket thoroughly. Repair any soft spots, cracks or corrosion.
• Clean the mounting area so the new motor sits flat and square.
• Replace old fuel hoses and the primer bulb, and install a water separating fuel filter where you can reach it easily.
• Decide on steering. If the old system is stiff or worn, replace it now.
• Order Honda controls, the main harness and a gauge or NMEA 2000 display if your old ones are not compatible.
• Test your batteries under load, or buy new ones. A strong starting battery matters with modern fuel injected engines.
• Choose a first propeller based on your boat and Honda’s recommendations.
• Book your rigger so the motor goes on soon after it arrives.

Doing this in advance can save you weeks of downtime once the crate shows up.

Why Honda Engineering Matters Here

Honda is first of all an engine company. It builds engines for cars, motorcycles, generators, lawn equipment and aircraft, and its outboards draw on all of that. The fuel injection on the Honda BF100A1XRT for sale, its engine management, VTEC, timing belt drive and even its alternator design come from long experience in other products. That is why Honda outboards tend to start easily, idle smoothly and keep running year after year with ordinary maintenance.

Honda was also one of the first big names to go fully four stroke in outboards, back when most of the market was still two stroke. It has been refining four stroke outboard design longer than most, and it shows in how settled and quiet this motor feels.

Fuel Quality Matters

Fuel injection is precise and reliable, but it needs clean fuel. Water, dirt and stale fuel are the enemies. In many parts of the world, the fuel at the pump is not always perfect, and boats that sit for weeks in hot climates can build up condensation in the tank.

Protect the Honda BF100A1XRT for sale with a good water separating filter, change the element regularly, buy fuel from busy stations, keep the tank topped up during storage to reduce condensation, and use a fuel stabiliser if the boat will sit. The engine has a water in fuel warning, but it is better never to need it.

New Motor Versus Used

A used 100 HP four stroke can look like a bargain. The trouble is you rarely know how it was treated. Was it flushed after salt water? Were oil changes done on time? Was it run hard without cooling water? Has the lower unit hit something? A brand new Honda BF100A1XRT for sale starts at zero hours with a clean history and years of service ahead. For a motor you plan to keep, that is worth paying for.

Who Buys This Motor

Our customers for the Honda BF100A1XRT for sale are a mix. Families repowering a pontoon that has served them well for years. Fishermen with centre consoles who want a lighter, quieter motor. Dive operators and tour companies running RIBs who need something that starts every morning. Marinas and rental fleets who want low running costs. Government and patrol users who need dependable power. What they have in common is that they want a motor they can stop thinking about once it is on the boat.

Running a RIB With the Honda BF100A1XRT for Sale

Rigid inflatable boats deserve their own mention, because they are a very common home for a 25 inch 100 HP motor. RIBs are light, stable and fast, and they are used for diving, patrol, rescue, tenders and tours. They also tend to be worked hard. The motor gets launched off beaches, run in surf and left on moorings.

For RIB use, a few tips help. Mount the motor so the prop has solid water even when the boat is running light, since RIBs can be lively in chop. Consider a four blade prop for better grip in rough water. Protect the fuel system with a good filter, because RIB fuel tanks often live in hot, humid lockers. And flush the engine after every salt trip, no matter how tired you are. The Honda BF100A1XRT for sale is well suited to this kind of work, as long as it gets that basic care.

How Long Will It Last?

People often ask how many hours a Honda four stroke will run. There is no single answer, because it depends so much on care. What I can say is that well maintained Honda four strokes routinely reach high hours in commercial and rental use, which is harder on engines than most private owners ever are. Change the oil on time, flush after salt, keep the fuel clean, replace wear items at the intervals in the manual, and the Honda BF100A1XRT for sale should give you many years of dependable running.

Other Honda Outboards to Compare

• Honda BF100A1LRT: 100 HP with a 20 inch shaft.
• Honda BF90D5XRTA: 90 HP, 25 inch shaft.
• Honda BF115D1XA: 115 HP, 25 inch shaft.
• Honda BF135A2XA: 135 HP, 25 inch shaft.
• Honda BFP60A1XRT: 60 HP Power Thrust for heavy boats.
• Honda BF50D4XRTA: 50 HP, 25 inch shaft.

Browse by power: 90 HP, 115 HP, 135 HP and 60 HP.

Questions About the Honda BF100A1XRT for Sale

Is it new?

Yes. The Honda BF100A1XRT for sale is brand new, crated and never mounted.

What shaft length?

25 inches. For 20 inches, choose the BF100A1LRT.

How much does it weigh?

365 pounds (166 kg) dry.

Is it a good pontoon motor?

Yes. It is one of the most popular sizes for mid size pontoons with a 25 inch transom.

Does it include a prop?

No. We can help you pick one.

Salt water?

Yes, with flushing and anode care.

Do you ship worldwide?

Yes. Ask us for a delivery estimate.

Buy the Honda BF100A1XRT for Sale

If your boat has a 25 inch transom and a 100 HP rating, the Honda BF100A1XRT for sale is a light, quiet, economical way to get strong performance. Add it to your cart or contact us with any questions. We are glad to help you get the setup right.

Want to see more options? Our Honda outboards page has the full line up.