Outboard motor · 2,5 HPYamaha F2.5SMHB
formerly F2.5BMHS
TillerInstallation and rigging at the GRAND BOATS Poland service centre in Łężyce. Sold in cooperation with an authorised Yamaha dealer; manufacturer warranty 3 + 2 years at an authorised Yamaha service.
Yamaha F2.5SMHB — 2,5 HP
Yamaha F2.5SMHB is a four-stroke outboard motor rated at 2,5 HP (1,8 kW at the propeller shaft), successor to the F2.5BMHS. Engine: OHV, 1-cylindrowy, displacement 72 cm³, 1 gaźnik. Dry weight: 17, 18 kg.
The tiller version — you steer directly with the handle, with throttle and shift at hand, no console or cables. A practical choice for inflatables, tenders and smaller RIBs. The model has manual pull start and manual angle adjustment (trim in several positions).
Shaft length S (15″ / 381 mm). The shaft is matched to the boat’s transom height so that the anti-cavitation plate runs just below the water surface. Transom height for this shaft according to Yamaha: 433 mm.
Fuel consumption at full power according to Yamaha: 1,2 L/h @5500 obr/min. The F2.5SMHB is within the power range the shipyard recommends for the GRAND S275. At the GRAND BOATS Poland service centre in Łężyce near Gdynia we install the engine, do the rigging and choose the propeller. The engine is supplied in cooperation with an authorised Yamaha dealer; the manufacturer warranty (3 + 2 years) is carried out by an authorised Yamaha service.
Yamaha F2.5SMHB
| Maximum output (at propeller shaft) | 2,5 KM (1,8 kW) |
|---|---|
| Full-throttle range | 5250–5750 rpm |
| Idle speed | 1800–2000 rpm |
| Fuel consumption (reference data) | 1.2 L/h @5500 rpm |
| Engine type | 4-stroke, OHV, single-cylinder |
| Displacement | 72 cm³ |
| Bore × stroke | 54,0 × 31,5 mm |
| Compression ratio | 8,8:1 |
| Fuel system | 1 carburettor |
| Lubrication | Splash |
| Engine oil capacity | 0,25 L |
| Ignition | CDI |
| Spark plug | CR6HSB |
| Alternator | — (none) |
| Trim | 4 positions |
| Gear ratio | 2,08 (27/13) |
| Gear shift | F-N |
| Shaft lengths in the family | S, L |
| Overall height (S shaft) | 1028 mm |
| Transom height (S shaft) | 433 mm |
| Beam | 363 mm |
| Weight (dry) | 17, 18 kg |
| Steering angle | 360° (full rotation) |
Source: Yamaha Product Information Guide 2026 (F2.5B family). Fuel consumption — manufacturer’s reference data.
