Mercury FourStroke 3.5hp 15in Short Shaft Tiller Outboard Motor
Details
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Product Info
Product Info
Take your small boat or tender to the next level with the Mercury FourStroke 3.5hp 15" Short Shaft Tiller Outboard Motor — a compact yet powerful setup that’s built for easy transport, simple operation, and rock-solid reliability. Weighing just 18kg, it’s a lightweight unit that’s easy to lift, mount, and stow, with ergonomic handles and well-placed lifting points making setup a breeze for one person.
Once it’s on the transom, the long tiller handle and integrated twist-grip throttle give you precise, comfortable control at every speed. Forward and Neutral shifting with 180° steering and full-thrust reverse make it easy to manoeuvre in tight spaces, while the four-point mounting system helps reduce vibration for a smoother experience on the water. Whether you’re putting around a quiet lake, running a dinghy to shore, or chasing the fish, this motor delivers dependable, responsive performance.
The built-in 1L fuel tank keeps things compact and efficient, freeing up valuable space on board. An external shutoff lets you run the carburettor dry for storage, protecting the engine and extending its lifespan. Starting is quick and easy too — the Capacitor Discharge (CD) ignition and decompression system combine to deliver strong, reliable spark and low-resistance pull starts, every time. Routine maintenance is straightforward with an oil sight gauge and simple drain plug that make oil checks and changes fuss-free.
With four manual trim positions and a tilt lock system, you can easily adjust your setup for different conditions or lift the motor out of the water for beaching and transport. Backed by Mercury’s impressive 3+3 non-declining warranty, this compact FourStroke gives you the confidence to explore further and enjoy every moment on the water. Lightweight, reliable, and easy to handle — it’s everything you want in a portable outboard and nothing you don’t.
Features
- Lightweight 2.5hp design weighing just 18kg and easy to lift, carry, and mount
- Forward and neutral shifting with 180° steering and full-thrust reverse for total control
- 1L built-in fuel tank that saves space and includes a shutoff valve for easy storage and carb protection
- Long tiller handle with a twist-grip throttle for simple, comfortable operation
- Throttle and steering friction control that lets you fine-tune resistance for smoother handling
- Multi-point mounting system that absorbs vibration and keeps things steady at any RPM
- Easy rope starting with CD ignition and decompression system for reliable, low-effort starts
- Simple maintenance with an oil sight gauge, drain plug, and fuel shutoff for cleaner oil changes and storage
- Four manual trim positions to maximise performance and lift the motor out of the water when needed
- Backed by Mercury’s 3+3=6 year non-declining warranty for lasting confidence on the water
Product Overview
Built to take on the harshest marine conditions, Mercury FourStroke outboards come armed with corrosion-fighting tech from top to bottom. We’re talking advanced alloys, tough-as-nails protective coatings, sealed electronics to keep the nasties out, and an easy freshwater flush system to rinse everything clean after a big day on the water. Premium protection that keeps your motor running stronger for longer.
Advanced tillerSet it up your way. Mercury’s adjustable tiller puts all the controls right where you need them, with options for left- or right-handed operation on select models. Comfortable, natural steering that keeps you in charge of every adventure.
Easy portabilityLightweight, simple to mount, and built for fun. Mercury’s 2.5–20hp four-stroke range lets you take the good times anywhere — from the tinny on the river to the tender behind the cruiser.
Convenient MaintenanceMercury makes the upkeep easy as. A no-spill oil change system, easy-out fuel filter, and a lifetime maintenance-free valve train all help keep you on the water longer and out of the shed.
Mercury 3 + 3 = 6 year warranty
When you purchase a brand-new Mercury Outboard from an authorised dealer, you’re covered by a massive 3+3 year warranty. That includes a bonus extra 3 years, factory-backed, with the same comprehensive coverage as Mercury’s standard 3-year manufacturer’s warranty — labour excluded — for any failures caused by defects in materials or workmanship. And good news: if you pass the motor on, any unexpired warranty can be transferred to the next owner as long as the product is properly re-registered.
Bonus Warranty Conditions
- The dealer must complete and document the official Mercury Marine pre-delivery inspection. Warranty only kicks in once the dealer has correctly registered your outboard.
- All servicing, maintenance, and repairs must be carried out by a factory-authorised Mercury dealer, and logged with Mercury.
- Stick to the recommended service intervals and maintenance schedule from the date of purchase.
- Only use genuine Mercury parts, oils, and lubricants.
- Make sure each service is recorded in your logbook and registered online by your authorised dealer.
Maintenance Schedule
First 3 Month Inspection3 months from date of sale or 20 hours for use - whichever occurs first. This post sale inspection will ensure everything is operating as required on your new engine. Even if your engine has only been used for a few hours, it is important to get this inspection done by the due date.
Annual InspectionOnce a year or every 100 hours of use - whichever occurs first.
Tech Spec
| 2.5HP SHORT SHAFT | 3.5HP SHORT SHAFT | 3.5HP LONG SHAFT | 4HP SHORT SHAFT | 5HP SHORT SHAFT | 6HP SHORT SHAFT | 6HP LONG SHAFT | |
|---|---|---|---|---|---|---|---|
| HORSE POWER | 2.5HP | 3.5HP | 3.5HP | 4HP | 5HP | 6HP | 6HP |
| SHAFT LENGTH | 15" | 15" | 20" | 15" | 15" | 15" | 20" |
| TRANSOM BRACKET TO CAVITATION PLATE MEASUREMENT | 17" 434mm | 17" 434mm | 17" 434mm | 17" 434mm | 17" 434mm | 22" 561mm | 22" 561mm |
| SUITS TRANSOM HEIGHTS | 15-17.5" 381-445mm | 15-17.5" 381-445mm | 15-17.5" 381-445mm | 15-17.5" 381-445mm | 15-17.5" 381-445mm | 19-22.5" 483-572mm | 19-22.5" 483-572mm |
| CAPACITY/CYLINDERS | 85CC / 1cyl | 85CC / 1cyl | 85CC / 1cyl | 123cc / 1cyl | 123cc / 1cyl | 123cc / 1cyl | 123cc / 1cyl |
| MAX RPM AT FULL THROTTLE | 4500-5500 | 5000-6000 | 5000-6000 | 4500-5500 | 4500-5500 | 5000-6000 | 5000-6000 |
| COOLING SYSTEM | Water-cooled with thermostat | ||||||
| STARTING | Manual | ||||||
| FUEL SYSTEM | Carburettor | ||||||
| FUEL TYPE | Regular Unleaded | ||||||
| FUEL TANK | Built-in 1L | Built-in 1L | Built-in 1L | Built-in 1.1L | Built-in 1.1L | Built-in 1.1L | Built-in 1.1L |
| GEAR RATIO | 2.15:1 | ||||||
| CONTROL & GEAR SHIFT | Tiller 360° / F-N | Tiller with side shift 360° / F-N | Tiller with side shift 360° / F-N | Tiller with side shift / F-N-R | Tiller with side shift / F-N-R | Tiller with side shift / F-N-R | Tiller with side shift / F-N-R |
| MOUNT STYLE | Thumbscrew | ||||||
| TRIM/TILT | Manual- 4 position | Manual- 4 position | Manual- 4 position | Manual- 6 position | Manual- 6 position | Manual- 6 position | Manual- 6 position |
| PROPELLOR | 3 blade aluminium | ||||||
| WEIGHT | 18kg | 18kg | 18kg | 26.3kg | 26.3kg | 26.3kg | 27.1kg |
| WARRANTY | 3+3=6 | ||||||