Yamaha F25SWTHC 25 hp 15

Description

We have the Yamaha F25SWTHC for sale, new in its crate and ready to ship anywhere in the world. It is Yamaha’s 25 horsepower four-stroke with a 15 inch short shaft, tiller steering, electric start and a manual pull cord as backup. The 432 cc twin uses battery-less fuel injection, and a 16 amp alternator keeps your battery charged as you run. It weighs about 141 pounds.

This is the most fully featured tiller version of the light, modern F25. You get key start with a pull cord backup, power trim to adjust the motor angle on the move for the best ride and speed, and power tilt to lift the motor at the press of a switch. For RIBs, fishing boats and tenders that beach often, run shallow water or trailer regularly, the Yamaha F25SWTHC for sale is the easiest Yamaha 25 to live with. Here is everything you need to know.

Yamaha F25SWTHC Specifications

Yamaha publishes F25 specifications on its 25, 20 and 15 HP portables page. The Yamaha F25SWTHC for sale is the short shaft tiller model with power trim and tilt, electric start and a pull backup.

The Model Code

F is four-stroke. 25 is horsepower. S is the 15 inch short shaft. W is electric start with a manual backup. T is power trim and tilt. H is tiller handle. C is the generation. The pull start version is the Yamaha F25SMHC. Without power trim and tilt, the same motor is the Yamaha F25SWHC. On a 20 inch shaft, the power trim equivalent is the Yamaha F25LWTHC.

Key Start With a Pull Backup

Some electric start outboards have no pull cord, so a flat battery leaves you stuck. The Yamaha F25SWTHC for sale keeps the cord. Day to day, you turn the key. If the battery runs down from electronics left on, cold weather or age, you pull the cord. Yamaha’s battery-less fuel injection powers itself from the engine’s generator, so the engine starts and runs perfectly even with a completely flat battery. That backup is valuable on any boat you rely on to get home.

The 16 Amp Alternator

The F25 platform has a strong 16 amp alternator for a motor this size. While the engine runs, it charges your battery, which can also power a fish finder, GPS, navigation lights, a bilge pump or a small livewell. For many owners, one battery charged by the Yamaha F25SWTHC for sale covers a full day of fishing electronics.

Battery-Less EFI

Fuel injection gives easy starting without a choke, a steady idle, clean running and crisp throttle response. It handles cold weather and stale fuel far better than a carburettor, and with no carburettor there is nothing to gum up over winter. That means the motor starts reliably after months in storage.

Lighter Than the Old 25

Yamaha’s redesign made the current F25 about 25 percent lighter than the model it replaced. On a RIB or small aluminium boat, a lighter motor lets the boat sit level, plane sooner and use less fuel.

Boats That Suit the Yamaha F25SWTHC for Sale

Fishing boats

On a 14 to 16 foot aluminium boat, jon boat or skiff with a 15 inch transom, the Yamaha F25SWTHC for sale is an excellent fishing motor. It runs you to the spot quickly with a full load, trolls smoothly thanks to the EFI, restarts with a key every time you move and charges your battery for the sounder.

RIBs and inflatables

On RIBs and inflatables from about 12 to 15 feet rated for 25 HP or more, it gives brisk planing with four people. As a yacht tender motor, key start means anyone aboard can run the tender, and the alternator can power a navigation light for evening runs.

Skiffs and small runabouts

Light skiffs with a 15 inch transom suit the 25 well, and the alternator can run lights and a small pump.

Shared boats

On club boats, rental boats or work dinghies used by many people, key start makes the motor easy for everyone, and the pull backup means nobody is ever stuck.

How It Runs

Turn the key in neutral and the Yamaha F25SWTHC for sale starts straight away, with no choke to fiddle with. The 432 cc twin idles smoothly and quietly. Open the throttle and the response is immediate, lifting the boat onto the plane cleanly. Shift at idle; reverse is strong. The tiller has adjustable steering friction, and Yamaha’s optional Variable Trolling RPM Switch can be added to fine-tune trolling speed in small steps.

Battery and Electrical

The Yamaha F25SWTHC for sale needs a 12 volt marine starting battery in a proper box, secured so it cannot slide, with the right cables and a fuse. Keep terminals clean and tight, especially in salt air. If you run electronics, fit a battery switch and turn them off during long drifts with the engine off. Over winter, take the battery home and keep it charged.

Fuel

The Yamaha F25SWTHC for sale runs from a separate portable tank with a primer bulb hose. Open the vent, squeeze the bulb until firm and start. Use fresh unleaded with no more than 10 percent ethanol, keep the fuel filter in good condition and add stabiliser if the boat will sit.

Fitting the Motor

Check your boat’s capacity plate for horsepower and engine weight. At about 141 pounds, use two people or a hoist. Mount the motor in the centre of the transom with the anti-cavitation plate at or just below the bottom of the hull, tighten the clamps and through-bolt it for a permanent installation. Fit a safety line. Set the trim rod so the leg is vertical when running. Mount and connect the battery, connect the fuel, check the oil, start in neutral and confirm the cooling water stream.

Break-In

For the first hours, run at varied low and medium throttle, add short bursts higher later, avoid long full-throttle runs and check the oil before each trip. Change the oil at the end of the break-in. The procedure is in the owner’s manual, available on Yamaha’s owner’s manual page.

Maintenance

After salt water use, flush with fresh water and rinse the outside. Each season, change the engine oil and gear oil, check the plugs, grease the clamp screws, swivel and tilt points, check the prop and anode, replace the fuel filter as recommended, and clean and tighten battery and wiring connections. Every few seasons, replace the water pump impeller. Before winter, stabilise the fuel, change the oil, flush, store the motor upright and keep the battery charged.

Troubleshooting

If the Yamaha F25SWTHC for sale will not crank, check that it is in neutral, the battery is charged and the fuse and connections are good; if the battery is flat, use the pull cord. If it cranks but will not start, check the fuel vent, hose, primer bulb, fuel freshness and kill switch clip. If it starts then dies, open the tank vent. If it runs rough, check the fuel filter. If the cooling stream is weak, clear the tell-tale outlet and check the intake and impeller.

A Day of Fishing

You launch, connect the tank, squeeze the bulb and turn the key. The Yamaha F25SWTHC for sale fires instantly. With two anglers and a cooler, the boat planes quickly across the lake. At the first point, you drop to trolling speed and the EFI holds a steady idle while the sounder runs off the battery the motor is charging. You drift the bank with the motor off, then turn the key and run back up. A dozen restarts later, you have not touched the pull cord once.

A Day on a Tender

On a cruising yacht, the RIB tender with the Yamaha F25SWTHC for sale is used all day. Crew members take it ashore for supplies, to the beach and back, each time with a turn of the key. The 25 planes a loaded tender in seconds, making even a distant anchorage a short trip. In the evening, the alternator has kept the battery topped up for the navigation light on the way back.

Pull Start or Electric Start?

The pull start F25SMHC is a few pounds lighter and a little cheaper, with no battery to look after. The Yamaha F25SWTHC for sale adds key start, battery charging for electronics and a pull cord as backup. If you start the motor only a few times per trip and run no electronics, pull start is enough. If you start often, run a fish finder or share the boat with others, electric start is worth it.

What Power Trim and Tilt Does

The T in the model code means power trim and tilt, and it is the reason to choose the Yamaha F25SWTHC for sale. A switch on the tiller lets you adjust the angle of the motor while you are moving. Trim the motor in to help the boat climb onto the plane and to keep the bow down in a chop. Trim it out once you are planing to lift the bow, reduce drag and gain speed and economy. Getting trim right can make a noticeable difference to ride comfort, speed and fuel use, and with power trim you can fine tune it on the move as conditions change.

The same system tilts the motor fully up at the press of a switch. A 25 HP outboard weighs well over 100 pounds, so lifting it by hand at beaches, ramps, shallow bars and moorings is hard work. With the Yamaha F25SWTHC for sale, it is effortless. You can also raise the motor partway to run slowly through shallow water.

Power trim and tilt does need the battery, so keep it charged. If the battery is ever flat, the motor still starts with the pull cord, and the owner’s manual explains how to use the manual release to tilt the motor by hand.

20 HP or 25 HP?

The F20 and F25 share the 432 cc EFI platform. The 25 makes more power for very little extra weight. If your boat is rated for 25 HP, the Yamaha F25SWTHC for sale gives you more reserve with heavy loads and in rough water. If your boat is rated for 20 HP, the Yamaha F20SWHB is the equivalent.

Running Electronics

With its 16 amp alternator, the Yamaha F25SWTHC for sale supports a reasonable electronics setup. Fuse every accessory, run wires neatly away from the bilge, fit a battery switch, and consider a second battery if you run big loads for long periods with the engine off.

Common Mistakes

Check the oil in the Yamaha F25SWTHC for sale before the first start. Use plain unleaded only. Shift only at idle. Keep the fuel and fuel filter clean. Flush after salt water. Fit a safety line. Keep the battery charged. And remember the pull cord exists, so a flat battery never strands you.

Choosing a Propeller

The standard prop suits most boats. If yours is heavy or always loaded, a lower pitch helps the engine reach its 5,000 to 6,000 rpm full throttle range and improves hole shot. Yamaha’s online prop selector is a good starting point, and we can help.

Hot and Cold Climates

EFI starts reliably in heat and cold. In hot places, keep fuel fresh, raise the motor clear of the water with the tilt switch when moored and check the battery often. In cold places, keep the battery charged, drain all water before frost and change the gear oil before winter.

Salt Water Care

Flush after every salt water trip, rinse the outside, check the anode each season and protect the powerhead and electrical connections with corrosion inhibitor and dielectric grease.

Lifting and Trailering

At about 141 pounds, use two people or a hoist and keep the leg pointing down. When trailering with the motor on, support the leg with a transom saver.

Teaching New Drivers

Key start makes the Yamaha F25SWTHC for sale an easy motor to teach. Set simple rules: start in neutral with the kill cord on, check the cooling stream, idle down before shifting, look behind before reversing and tilt up before the shallows. Show everyone where the pull cord is.

Getting Better Fuel Economy

Trim the boat to run level, keep the hull and prop clean, cruise a little below full throttle and match the prop to your load.

A Season of Ownership

In spring, the battery comes back charged, the oil is checked, fresh fuel is connected and the key is turned. With EFI, the Yamaha F25SWTHC for sale normally starts straight away. Through the summer it handles fishing days, coastal runs and tender duty. After salt water, it gets a flush. In autumn, the oil and gear oil are changed, the fuel stabilised, the motor flushed and stored, and the battery goes home on a charger. Every few seasons, the impeller and fuel filter are replaced.

Keeping the Fuel System Healthy

EFI relies on clean fuel. Buy fuel where it turns over quickly, filter it when filling portable tanks, keep tanks sealed and shaded, and replace the fuel filter at the intervals in the manual.

What Comes in the Crate

The motor arrives assembled with the propeller fitted, the owner’s manual and factory paperwork. A battery is normally separate, and a fuel tank may or may not be included, so ask us. Check the oil tag and level before the first start.

Warranty Notes

Yamaha’s factory warranty terms vary by country and type of use. Ask your local Yamaha dealer what they honour, and keep your invoice and serial number safe.

Before You Order

Measure your transom from the top to the bottom of the hull, check your boat’s capacity plate and decide where the battery will sit. If the transom is about 15 inches and the boat is rated for 25 HP or more, the Yamaha F25SWTHC for sale is a good match. Send us a photo of the transom and plate if you would like us to confirm.

Who We Are

We are an online dealer of new outboard motors shipping worldwide. The Yamaha F25SWTHC for sale is a regular stock item, and every question is answered by someone who knows outboards. Our blog has more advice.

Planing Performance in Practice

On a typical 13 foot RIB with three or four adults, the Yamaha F25SWTHC for sale lifts the boat onto the plane within a few seconds of opening the throttle, without the bow climbing high. Once up, you can ease back to a comfortable cruise and the boat stays planing, running level and dry. In a short chop, the reserve power keeps it there rather than dropping off and wallowing. On a 16 foot aluminium boat with two anglers, a cooler and a full tank, the story is the same: a clean, confident hole shot and a relaxed cruise. That reserve is why owners of boats rated for 25 HP so often choose the Yamaha F25SWTHC for sale.

Using It on a Work Boat

On a shared work boat, key start means anyone can run the Yamaha F25SWTHC for sale, the pull backup means a forgotten charger never stops work, and EFI keeps it starting reliably every morning. Keep a laminated card in the boat with the basic rules, check the oil daily and service by hours.

Running Costs

The Yamaha F25SWTHC for sale is economical. EFI meters fuel precisely, so consumption at cruise is modest and very low when trolling. Oil changes are small and wear parts are inexpensive. The battery is the only extra compared with the pull start model.

Why Yamaha

Yamaha’s dealers and parts reach almost every country with boats. The F25 is light, modern and proven, and Yamaha outboards hold their value. That is why we keep the Yamaha F25SWTHC for sale in stock.

25 HP Versions Compared

Browse the 25 HP Yamaha section or the full Yamaha outboard range.

Ordering

Add the Yamaha F25SWTHC for sale to your cart and check out, or contact us first. We confirm stock and delivery, pack the motor with extra protection and send tracking once it ships worldwide. International buyers pay their own import duty and taxes; we provide the paperwork customs needs. See our refund and return policy, terms and conditions, reviews and about us page.

FAQ: Yamaha F25SWTHC for Sale

Is the Yamaha F25SWTHC for sale new?

Yes, new and crated.

Is the Yamaha F25SWTHC electric start?

Yes, with a manual pull backup.

Will the Yamaha F25SWTHC for sale start with a flat battery?

Yes, with the pull cord. The EFI does not need the battery.

Is the Yamaha F25SWTHC for sale fuel injected?

Yes, battery-less EFI.

What transom height does the Yamaha F25SWTHC for sale fit?

About 15 inches.

Does the Yamaha F25SWTHC for sale charge a battery?

Yes, through a 16 amp alternator.

Is the prop included?

Yes.

Is the Yamaha F25SWTHC for sale good in salt water?

Yes, with a freshwater flush after use.

Final Word

Not sure whether you need the short or long shaft, or whether power trim would be worth it on your boat? Send us your boat’s make, length and transom height and we will tell you honestly which version suits you best.

If you want the light, fuel injected Yamaha 25 with key start convenience and a pull cord for peace of mind, the Yamaha F25SWTHC for sale is the one for a 15 inch transom. Add it to your cart, or ask us anything first. Everything else we stock is in the shop.