Yamaha F25LMHC 25HP Outboard – 20in Shaft, Tiller
Steering stays direct, Yamaha F25LMHC delivers 25 horsepower. Rigging includes a 20-inch shaft and tiller steering. The layout favors easy servicing over a season of use. Owners choose it for steady output without excess weight.
- 25 horsepower, ready to run
- Shaft length 20 inches
- Tiller steering, simple setup
- Manual start, no battery needed
- Straightforward to service and maintain
Description
Remote backcountry river runners trust the Yamaha F25LMHC for absolute off-grid ignition independence. The 432cc battery-less EFI block forces steady low-end torque via a single manual pull-cord, pushing heavily loaded aluminum workboats upstream against aggressive morning currents. Verifying your exact transom geometry ensures this 25hp manual start long shaft outboard mounts safely without starving the internal cooling water pump.
Clear submerged rocky obstacles safely in shallow creeks by utilizing the manual tilt bracket as a direct physical lifting aid. You grab the rear cowl grip to pull the 57 kg gearcase upward instantly to prevent devastating propeller impacts. Engineers cast the lower unit housing using multi-stage anti-corrosion treatments. This structural barrier stops galvanic decay when repowering tall transom utility boats in harsh brackish water environments.
Key Features of Yamaha F25LMHC
- Battery-Less EFI: Atomizes fuel perfectly using internal magnetic power, guaranteeing reliable cold-weather pull starts without requiring a 12-volt battery.
- Manual Recoil Starting: Strips heavy starter motors and battery cables completely from your boat, maximizing available gear payload capacity.
- 20-Inch Long Shaft: Places the anti-ventilation plate deeply beneath tall utility transoms, preventing water pump starvation in heavy chop.
- Multi-Function Tiller Handle: Concentrates shift and throttle inputs directly into your operating hand for immediate physical obstacle avoidance.
- Manual Tilt Bracket: Features a rigid mechanical lock, safely holding the gearcase out of the water physically while moored at the dock.
- 16-Amp Charging Alternator: Outputs constant electrical current while running, keeping small deep cycle batteries topped off for fish finders.
- 432cc Inline-Two Block: Produces massive low-end torque internally, lifting heavy aluminum work boats onto plane much faster.
- 2.08:1 Gear Ratio: Multiplies engine torque effectively, translating the 432cc displacement into relentless pushing force for loaded skiffs.
- Anti-Corrosion Castings: Blocks severe galvanic decay physically, protecting the aluminum powerhead block across decades of daily saltwater exposure.
- Clean Four-Stroke Combustion: Burns unleaded fuel highly efficiently without messy two-stroke oil mixing, keeping pristine anchorages completely free of surface oil slicks.
Why Choose Yamaha F25LMHC
This specific build fits only 20-inch transoms requiring direct physical tiller control. The extended shaft creates massive drag if mounted on a standard 15-inch boat. You cannot wire this to a forward console steering wheel. Procuring a reliable manual start long shaft outboard secures off-grid pushing power.
- Confirm a 20-inch vertical measurement from the transom top to the keel.
- Verify the tiller handle sweep path clears your rear bench seating completely.
- Avoid oil slicks on the water utilizing modern four-stroke internal lubrication.
Ideal Application and Vessel Fitment
This 20-inch manual-start tiller engine is engineered specifically for tall-transom aluminum work skiffs, heavy fiberglass camp boats, and commercial river-running hulls demanding high thrust in a portable package. By stripping away heavy electric starter motors and battery banks, operators gain maximum payload capacity for remote area fishing gear. The large 432cc block guarantees this reliable manual start tiller outboard pushes heavy loads instantly in freezing weather, making it the definitive off-grid power plant.
Warranty, Support and Maintenance
Authorized recreational operation receives a 3-Year Pleasure Warranty alongside exceptional factory support. Registered commercial applications fall under strict factory guidelines with separate terms applied to the block. Scheduled maintenance requires replacing gearcase lubricants and changing oil filters at manual-specified intervals. Always save all physical service records. Your engine serial number acts as the only way to source exact genuine replacement parts. Mulmotor provides product-information support before purchase and assistance with order-related questions.
Yamaha F25LMHC Specs
| Brand | Yamaha |
| Full Model Code | F25LMHC |
| Country of Origin | Thailand |
| Engine Family/Series | Portable |
| Engine Type | Inline-2, SOHC, 4-Stroke |
| Displacement | 432 cc |
| Horsepower | 25 HP |
| Full Throttle RPM Range | 5000-6000 |
| Fuel Induction System | EFI (Battery-less) |
| Alternator Output | 16 Amps |
| Gear Ratio | 2.08:1 |
| Shaft Length | L: 20in |
| Dry Weight | 57 kg (126 lbs) |
| Bore x Stroke | 65.0x65.1mm |
| Starting & Steering System | Manual Recoil / Tiller Handle |
| Trim/Tilt Method | Manual Trim & Tilt |
| Oil Capacity | 1.1L |
| Recommended Fuel | 87 Octane |
| Standard Warranty | 3-Year |
| Application | Aluminum fishing boats and skiffs with manual operation (20in transom). |









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