Yamaha 4 HP Tiller 4-Stroke Outboard Motor
A compact 139 cc four-stroke tiller outboard for small boats, dinghies and tenders.
Get it to
Order in-stock items by Dec 12 for delivery before Christmas.
Owner photos
Available to order.Motor delivery depends on the order and destination. Call 888-978-1503 for a delivery date.
- Yamaha warranty
Claims and service through Yamaha - Four-stroke, 4 hp
139 cc single cylinder - Matched to your boat
We talk it through before you order - Family owned since 2012
Real people at 888-978-1503
- The Yamaha F4 in the shaft and options you select
Ask us to confirm the propeller, fuel tank and hose, and starting-battery needs for your configuration before you order. Boats are sold separately.
Warranty and service: This motor is covered by the manufacturer's warranty. Warranty claims and service are handled directly by Yamaha, and we are happy to point you to the right contact.
Returns: Motor sales are final. A 7% fee applies if an order paid with a financing plan is cancelled. Returns and refunds
Warranty and service: This motor is covered by the manufacturer's warranty. Warranty claims and service are handled directly by the motor manufacturer, and we're happy to point you to the right contact.
Returns: Motor sales are final. A 7% fee applies if an order paid with a financing plan is cancelled. Returns and Refunds
Yamaha 4 HP at POP Board Co
Carry it in one trip. Fish all day.
The Yamaha 4 HP four-stroke is a 139 cc single-cylinder that weighs 60 lb dry, with a tiller handle, manual start with decompression and a built-in fuel tank. It is the motor you carry down the dock yourself and mount without a second pair of hands.
Specs at a glance
The Yamaha 4 HP in numbers.
Which Rover it fits
Where the Yamaha 4 HP sits on a Rover.
All six Rover boats list a 15 in transom. The 4 HP sits within the rating on every size. None of these is an automatic fit approval: check your exact boat, motor weight, mounting and total load.
8 ft Rover Marine
8 ft Battle Cat or Battle Boat
Below the 6 hp rating. Same rating on both 8 ft hulls.
$1,699$2,250
Save $551
- Max motor6 hp
- Transom15 in
- People2
- Capacity600 lb
10 ft Rover Marine
10 ft Battle Cat or Battle Boat
Below the 10 hp rating. Same rating on both 10 ft hulls.
$1,799$2,550
Save $751
- Max motor10 hp
- Transom15 in
- People4
- Capacity1,000 lb
12 ft Rover Marine
12 ft Battle Cat or Battle Boat
Below the 20 hp rating. Same rating on both 12 ft hulls.
$1,899$2,799
Save $900
- Max motor20 hp
- Transom15 in
- People4
- Capacity1,200 lb
Keep the boat you love, or build something new
Three checks before you repower.
01. Read the boat rating
Check the horsepower and motor-weight limits on your actual boat and model year. Electric motors still count against the rating, and a battery adds weight on the transom.
02. Match the shaft
Use the shaft length your transom calls for. Rover Marine boats have a 15 in transom and take a short shaft. Do not pick a longer shaft just to get electric start or power tilt.
03. Plan the complete rig
Confirm mounting, steering clearance, propeller, fuel or charging, and any starting-battery needs. Count passengers, motor, fuel or battery and gear in the boat's load.
Lake Forest, California
Why buy from POP.
Family owned, since 2012.
Matched to your boat.
Every motor page shows which Rover sizes sit within its rating, and we will talk through your boat before you order.
Short shaft for Rover.
Rover Marine boats have a 15 in transom, so they take a short-shaft motor.
Manufacturer warranty.
Warranty and service are handled by the motor maker. We will point you to the right contact.
Rover boats too.
We sell and support the Rover Marine Battle Cat and Battle Boat in the US.
Family owned since 2012.
POP Board Co started with paddle boards in 2012. Life is more fun in color.
Real people.
Boat and motor questions. Call 888-978-1503 or email info@popboardco.com.
Yamaha 4 HP questions.
Can I pair the Yamaha 4 HP with a Rover boat?
All six Rover boats list a 15 in transom. The 8 ft Battle Boat and Battle Cat list 6 hp; the 10 ft Battle Boat and Battle Cat list 10 hp; the 12 ft Battle Boat and Battle Cat list 20 hp. None of these is an automatic fit approval: check your exact boat, motor weight, mounting and total load.
Is 4 HP enough for an 8 ft Rover?
The 8 ft boats list up to 6 HP, so the 4 sits within the rating and suits easy displacement speeds, tender runs, and one or two people with light gear. It will not push a loaded 8 ft boat onto plane the way the 6 HP ceiling match would.
Is 4 HP enough for the 10 ft models?
The 10 ft boats list up to 10 HP, so the 4 is a natural match for tenders, harbor runs, and one or two people with light gear. A full four-person crew with gear will feel leisurely rather than quick.
Is 4 HP enough for a 12 ft Rover?
It will move a 12 ft boat at easy displacement speeds with a light crew, but it is modest power for a boat rated up to 20 HP. With four adults and gear aboard, do not expect quick planing.
Can one person carry the F4?
Yes. At 60 lb dry with built-in front and rear carry handles, one adult can carry it short distances, such as down a dock or from a vehicle to the transom.
Does it have a built-in fuel tank?
Yes. The F4 carries a 1.1 L integral tank and also connects to an external tank for longer runs. The external tank is not included.
Are the boat, fuel tank, battery and rigging included?
No. The Rover boats are separate products. Ask us to confirm the package contents for the configuration you pick, including the propeller, fuel tank and hose, starting-battery needs and any rigging. Do not assume an accessory is included because it shows up in a lifestyle photo.
What speed should I expect?
Speed and planing depend on the hull, load, propeller, installation and conditions. There is no single speed promise for every boat and motor. Tell us your normal crew and use and we will talk it through.
Who handles warranty and service?
Yamaha. Warranty claims and service go directly through Yamaha, and we are happy to point you to the right contact. Use the engine's Primary ID from its serial label or warranty card to find the right Yamaha owner's manual.
Can I return a motor?
Motor sales are final. A 7% fee applies if an order paid with a financing plan is cancelled. Returns and refunds
Yamaha 4 HP specs.
- Rated output4 HP
- Displacement139 cc
- Engine layoutSingle cylinder, OHV
- Fuel inductionCarburetor
- Full-throttle range4,000 to 5,000 rpm
- Gear ratio2.08:1
- Dry weight60 lb, 15 in shaft
- StartingManual, with decompression
- Shaft15 in short shaft (F4SMHA)
- Fuel1.1 L integral tank, external tank optional (not included)
- WarrantyYamaha manufacturer's warranty
What's included
- The Yamaha F4 in the configuration you select
This listing is the 15 in short-shaft, manual-start tiller model. Confirm the exact model and supplied equipment before planning installation.
Yamaha 4 HP.
$1,750 USD
Compact power you carry yourself.