When you need dependable power in a package that you can carry with one hand, the 2018 Yamaha F15SMHA stands alone. At just 111 pounds dry weight, this 15hp portable outboard is the ideal companion for aluminum fishing boats, inflatables, tenders, and jon boats . Powered by a 362cc SOHC inline-two-cylinder engine with a single carburetor and CDI Microcomputer Ignition System, it delivers smooth, fuel-efficient power that has made Yamaha the standard in portable four-stroke outboards . To browse our complete inventory of new outboard motors, explore our showroom selection.
(H2) Portable Power: Engineered for the Small Boat Owner
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The F15SMHA is the result of decades of Yamaha’s experience in portable outboard design. Its 362cc, two-cylinder SOHC engine features a two-valve-per-cylinder design that provides better breathing and more power than comparable portables in its class . The single carburetor induction system is renowned for its simplicity, reliability, and ease of maintenance—a critical consideration for boaters who operate in remote or challenging conditions .
The CDI Microcomputer Ignition system monitors throttle position, engine speed, and atmospheric conditions to precisely adjust ignition timing under all conditions, ensuring smooth and reliable operation . An acceleration pump delivers fuel instantly during rapid throttle advance, ensuring responsive acceleration when you need it most . For those seeking additional value, our certified pre-owned outboard motors undergo rigorous inspection and offer warranty-backed confidence.
(H3) Key Features & Technical Benefits
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Incredible Portability
Weighing just 111 pounds dry (50 kg) for the 15-inch shaft model, the F15SMHA is one of the lightest 15hp four-strokes available . Built-in resting pads and carry handles, combined with an easy oil retention system, allow for convenient carrying and on-side storage without oil leakage or cowling scuffs .
Manual Start with 10-Amp Charging
The reliable manual recoil starter is complemented by a 10-amp alternator that keeps your battery charged while running—enough power for fish finders and basic electronics .
Exceptional Maneuverability
A 45-degree steering angle in each direction provides outstanding maneuvering potential, making docking and tight-quarters handling a breeze .
Superior Corrosion Protection
Yamaha’s proprietary YDC-30 alloy combined with the exclusive Phaze Five™ electro-deposited, anti-corrosive paint system provides a tough, five-layer barrier against corrosion. This protection is standard on all Yamaha Portable four-stroke outboards .
Freshwater Flush Device
An integrated Freshwater Flush Device allows you to flush the engine without running it, providing added convenience and extended engine life .
Engine Warning System
Protects the outboard with a range of functions including overheat protection, low-oil-pressure warning (automatically reducing maximum RPM to 2000), over-rev protection, start-in-gear protection, and shift-in prevention at open throttle .
(H2) Technical Specifications
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This table provides a clear, scannable overview of the engine’s technical details based on manufacturer specifications .
(H2) Recommended Companions
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To maximize the performance and longevity of your Yamaha F15SMHA, consider pairing it with these essential accessories, available through our propellers, fuel systems, and maintenance kits section:
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Yamalube® 4M Marine Engine Oil: The factory-recommended oil for optimal protection and performance
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Yamaha 10-Micron Fuel/Water Separating Filter: Essential for protecting the carburetor from ethanol-related issues and water contamination
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Yamaha Aluminum Propeller (standard size): The factory-standard prop ensures your engine delivers its rated performance
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Yamaha Folding Tiller Handle: Optional accessory for enhanced portability and storage convenience
(H2) Popular Searches
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Customers who viewed the 2018 Yamaha F15SMHA are also searching for:
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Yamaha F20SMHA 20hp portable outboard
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Yamaha F15SMHA service manuals and parts diagrams
For expert guidance on selecting the ideal engine for your vessel, consult the BoatUS Outboard Motor Buying Guide (nofollow), which offers comprehensive advice on matching outboard specifications to your specific boating needs.
(H2) Service & Support at Aqua Marine Outboard
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Our commitment extends beyond just selling premium outboards. We are your full-service marine partner, and we make ownership accessible through our flexible financing options tailored to your budget. Our factory-trained technicians provide everything from routine maintenance and winterization to complex diagnostics and repairs.
Visit Our Showroom: Stop by at 1428 Wallace Ave, San Francisco, CA 94124 or call +1 (415) 882-6361 to speak with a marine specialist. For official documentation and to verify OEM specifications, you can also refer to the Yamaha Outboards Official Website (nofollow) and the Yamaha Genuine Parts & Accessories (nofollow) pages.
(H2) Frequently Asked Questions (FAQ)
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Q: What does the “SMHA” designation mean on the Yamaha F15?
A: The “SMHA” indicates this is the manual start, tiller-steer version with a 15-inch (short) shaft. This is the standard portable configuration for small boats .
Q: What is the dry weight of the 2018 Yamaha F15SMHA?
A: The 15-inch shaft model weighs just 111 pounds (50 kg), making it one of the lightest 15hp four-stroke outboards on the market .
Q: Is the F15SMHA available in different shaft lengths?
A: Yes, the F15 is available in 15-inch and 20-inch shaft lengths. The “SMHA” designation specifically refers to the 15-inch model .
Q: What type of fuel induction does this engine use?
A: The F15SMHA uses a single carburetor—a proven, simple design that offers reliable starting and consistent performance .
Q: What is the ethanol limit for this engine?
A: Yamaha recommends a maximum ethanol blend of 10% for this carbureted engine. Using an external Yamaha 10-Micron Fuel/Water Separating Filter is strongly advised to protect the carburetor .
Q: Does the F15SMHA have a battery charging system?
A: Yes, the F15SMHA features a 10-amp alternator that keeps your battery charged while running—enough power for fish finders and basic electronics .
Q: Can the F15SMHA be stored on its side?
A: Yes, Yamaha’s portable engines are designed with an easy oil retention system and built-in resting pads that allow for on-side storage without oil leakage or cowling scuffs .
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