50 years of leading the way in innovation – from bringing the down thrust propeller system to market in 1965, to introducing the world’s first 300HP V6 4-Stroke outboard in 2006.



As well as offering a three-year leisure or 1-year commercial warranty on all of our 4-stroke outboards, we also have a nationwide network of Suzuki Authorised Dealers who are always on hand to provide support wherever you are, whenever you need it.



As every engine in our range is designed specifically for the rigours of marine use our 4-Stroke outboards provide quiet, fuel-efficient and reliable technology whilst delivering market-leading power and performance.


DF20A / DF15A / DF9.9B / DF9.9A / DF8A / DF6A / DF5A / DF4A / DF2.5

three way storage



The design allows the outboard to be removed from the boat and placed on any of its 3 sides for storage only on the DF6 model.

  • Can be stored anywhere.
  • There is no need to worry about the loading space or method.

three-way storage

battery-less fuel injection



Parts used in the larger models have been redesigned into a more compact design and mounted onto smaller size models.

  • Quick and easy start.
  • Cleaner and economic fuel consumption
  • Higher performance in almost all operating ranges.
overhead tanks



The integral overhead fuel tank and one-way valve delivers fuel supply using gravity.

  • Engine can start without having to open the engine cover, even after long-term storage.

overhead tank

DF60AV / DF50AV / DF60A / DF50A / DF40A / DF30A / DF25A

lean burn



The Lean Burn Control System supplies the right fuel and air mixture depending on the navigation conditions.

  • Significant improvement in fuel economy in all speed ranges especially at cruising speed.
  • Fuel is saved and gasoline costs are cut thanks to improved fuel economy.
self-adjusting timing chain



The timing chain runs in an oil-bath so it never needs lubricating, and is equipped with an automatic hydraulic tensioner so it remains properly adjusted at all times.

  • More durability compared to belt types of same class.
  • Maintenance-free.



These outboards are equipped with gears designed with a 2.42 gear ratio, which is larger than the standard model, in their lower units. When combined with a large 14-inch (36cm) propeller, the powerful system can deliver an explosive forward thrust.

  • Powerful navigation and precise manoeuvring even with big loads.
  • Tremendous power to turn large diameter propellers, offering quick acceleration.

DF140A / DF115A / DF100A / DF100B / DF90A / DF80A / DF70A

water detecting system



It helps protect the engine from water in the fuel using a water detecting fuel filter to alert the operator with both visual and audio warnings when water is present in the fuel.

  • Can avoid water in fuel, which can lead to issues like poor combustion, lower power output and corrosion.




  • High propulsive efficiency with large diameter propeller.
  • Powerful navigation, maintaining propeller rotation even with a larger load.
  • Tremendous power to turn large diameter propellers, offering quick acceleration.


These reduction gear ratios are the largest in each class.

DF350A / DF300AP / DF250AP / DF200AP / DF175AP / DF150AP

selective rotation



Function for selecting regular or counter rotation on one outboard with an optional connector.

  • Either regular or counter rotation can be used on the same outboard.



quiet operation



Intake noise is Resonator suppressed with a resonator, which makes the noise from the outboard quieter.

  • Quiet operation.
  • Less noise, making boating more pleasant.


precision control



Operation from the remote control is delivered to outboard via an electric signal and not by the traditional mechanical control cables.

  • Less friction and resistance compared to mechanical type that uses control cables.
  • Quick and reliable operation.
  • Lean Burn integration offers improved fuel efficiency.




What type of fuel should I use in my outboard?

The minimum octane rating that you should use is 93. We also recommend adding a fuel stabilizer if the boat is to be stored for longer than 2 months.

Are 4-stroke outboards pre-filled with engine oil?

NO! Four-stroke Suzuki outboards are NOT filled with oil from the factory. You must add oil to the crankcase prior to use.

Does the lower unit come pre-filled with oil?

Yes. The lower unit gear oil is pre-filled by the factory, however, you should check to ensure proper level before first use. To replace/add lower unit oil we recommend a SAE 90 weight gear oil with a GL-5 SAE classification. For additional information, see your owner’s manual.

What type of 4-stroke oil is recommended?

Suzuki recommend the use of a FC-W® rated NMMA (marine) certified four-stroke engine oil with a viscosity rating of 10W-40 when available.


NOTE: With four-stroke outboards, oil is added directly to the engine crankcase. Four-stroke outboards use straight gasoline in the fuel tank (no oil mix).

How often should I change my oil in my Suzuki outboard?

The first oil change is at the 20-hour service and then every 6 months or 100 hours thereafter.


What is the smallest Suzuki outboard that offers electric start?

At the moment, electric start is available starting the 2-stroke 30hp remote control model. On the 4-stroke range, models of 40hp and more have electric start.

What is a ``remote control`` model outboard?

A “remote control” outboard is one that is equipped with remote throttle, shift and steering controls. This allows the user to operate the outboard from a remote location in relation to the engine (throttle/shift and/or steering).

Are Suzuki outboards salt-water rated?

Yes. Suzuki utilizes a unique four-part system to fight the effects of saltwater corrosion, beginning with the use of high-grade aluminium alloy for metal castings. A thorough chemical cleaning process prepares the casting ensuring superior adhesion of surface coatings.

The parts are then submerged in an electrified bath of chromium oxide. The bath changes the make-up of the casting’s surface and creates an invisible barrier that becomes integrated as part of the casting.

Finally, an extremely hard and resilient epoxy resin primer is baked on, and a top coat of Melamine resin marine grade paint is applied to the castings. Suzuki’s casting and finishing process protects the outboard and effectively seals out saltwater.

Suzuki’s anti-corrosion system does not stop at casting construction and finishing. All Suzuki outboards feature sacrificial zinc anodes strategically placed internally and externally. These replaceable anodes fight corrosion and preserve overall engine integrity. Additionally, the use of specialized marine-grade stainless steel and Dacromate coated hardware for key components ensure superior corrosion protection in even the harshest environments.

How do I measure the shaft length?

If mounting directly to a boat transom: Measure from the top of the transom down to the bottom of the hull or keel (lowest point). Measure the area of the transom directly where the engine will be mounted. See diagram below.

If using an auxiliary mounting bracket: With the bracket in the down position, measure from the top of the bracket’s mounting surface down to the bottom of the hull or keel (where engine is to be mounted). Tip: For most auxiliary applications, it is possible to use a longer shaft length than what is called for, provided there is sufficient clearance when the engine is in the up position. This can be especially useful in heavy seas.

If measuring an existing outboard: Measure from the inside top of mounting bracket down to anti-cavitation plate above propeller (this is the largest plate/fin directly above the propeller). See diagram below.


What is the CARB emissions rating for new Suzuki outboards?

The California Air Resources Board (CARB) requires manufacturers to apply environmental emission rating labels to all new outboard engines which began with model year 2001. The Emission label keeps consumers informed when making a purchase decision. California emission regulations are stricter than EPA regulations.

Every Suzuki four-stroke outboard sold today meets or exceeds all EPA emissions standards and has a CARB 3-Star Ultra Low Emissions rating.


What's the break-in procedure for my new outboard?

Break-in consists of maintaining lower RPM levels and varying the RPM’s for the first 10 hours of use. The break-in procedure is included in your owner’s manual. Correct operation during the break-in period will prolong the life of your new outboard and will ensure optimum performance. Break-in should be done under a load (on your boat, not at home in a container of water).

What do I need to do before using my new outboard?

Engine oil must be added prior to use. The engine oil is drained by the factory prior to shipping. When your new outboard arrives, you simply add engine oil (amount and type are shown on page 1 of manual). The lower unit gear lube is pre-filled from the factory. No assembly is required. Even the propeller is pre-installed for your convenience.

If you have purchase an electric start model, your outboard will include battery leads pre-installed from the factory (battery not included). You simply connect the battery leads to your battery. The Warranty conditions require that this work be carried out by an Authorised Suzuki Dealer.

Read the owner’s manual carefully prior to operation. The owner’s manual contains important information regarding the break-in period, safety and proper use of your outboard engine.

May I start the engine out of water?

Never start your engine out of water unless you are using an external lower-unit flushing adapter, commonly known as “ear muffs” designed for your type of outboard motor (not the integral Freshwater Flush Adapter found on some engines) to provide cooling water from a garden hose. Otherwise, you could damage or seize the engine. Operate at no more than an advanced idle with good water pressure. Never put the engine in gear. Never leave a running engine unattended.


Can I get parts for a very old Suzuki outboard?

Suzuki will do its best to get you the parts you need, but the older the motor, the less likely it is that parts will be readily available. Availability, to a certain extent, depends on how many models the specific part was used for and the number of years your model was produced. You’ll find the manufacturer’s identification tag on the motor mount bracket, generally on the starboard (right) side of the bracket. Be sure to take down all the information on the model designator, including all prefixes and suffixes and show it to your Suzuki dealer. We’ll do everything possible help you get new to parts for your older Suzuki outboard.

I keep my boat in the water and am concerned about flushing it regularly. What can I do?

Suzuki outboards are equipped with fresh water flush ports (all models except DF2.5, 9.9, 15, 40 and 50). A simple garden hose attachment makes it easy to clean the cooling system of saltwater and impurities. In fact, DF70, 80, 90, 250SS and 300 have dual flushing ports. One is located on the backside of the down housing and the second is located on the front panel to provide easy access and no excuses.

Is the timing chain really maintenance free?

Yes it is! The timing chain is located below the power head where it runs in a continual oil bath for dependable and quiet operation. With Suzuki’s exclusive automatic hydraulic chain tensioner, you can focus on boating and having a good time. (DF40, 50, 70, 80, 90, 100, 115, 140, 150, 175, 200, 225, 250, 250SS, 300).


Can I use the Tilt Support Lever for transporting my Suzuki outboard?

No. The Tilt Support Lever is to be used only for storage purposes. The Tilt Support Lever was not designed to withstand the strain of transport and could break causing damage to the Tlit Support Lever and/or other bracket components. There are many aftermarket companies that provide “transom savers” that can offer a solution for your transportation needs. Please make sure that whatever aftermarket component you use is designed to work specifically with your Suzuki outboard. You can review “Storage and Transportation” instruction in your Owner’s Manual. You can find this information in the Maintenance section.

Can a 4-stroke be laid on its side during transport and storage?

Yes. If necessary, outboards up to 15hp can be laid on its side but it must be laid on the proper side. Your outboard includes a picture (decal) on the engine itself indicating which direction the engine can be laid. Please see owner’s manual for additional information on transporting and storage of your outboard.


What does the warning buzzer and subsequent flashing light mean?

You should read your Owner’s Manual before operating your Suzuki Outboard. It will explain various warnings you might encounter during operation. The monitor gauge will illuminate why the warning buzzer has sounded. If the warning buzzer is indicating a problem with oil or overheating, it will also be accompanied by a reduction in maximum RPM. The buzzer will sound when the engine is started. The warning system will sound and the oil light will illuminate after the first 20 hours of operation – it is time for the first oil change. This process will repeat after another 80 hours of operation and then again after every 100 hours of operation. Conditions like low oil and overheating can seriously damage your engine. If you are unable to determine why the buzzer has sounded, you should check with your authorized Suzuki Marine dealer before continued operation.