Outboard motor · 6 HPYamaha F6SMHB
formerly F6DMHS
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 F6SMHB — 6 HP
Yamaha F6SMHB is a four-stroke outboard motor rated at 6 HP (4,4 kW at the propeller shaft), successor to the F6DMHS. Engine: SOHC, rzędowy 2, displacement 212 cm³, 1 gaźnik. Dry weight: 38–41 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: 431 mm.
Fuel consumption at full power according to Yamaha: 2,6 L/h @5500 obr/min. The F6SMHB is within the power range the shipyard recommends for the GRAND S330, GRAND S300, 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 F6SMHB
| Maximum output (at propeller shaft) | 6 KM (4,4 kW) |
|---|---|
| Full-throttle range | 5000–6000 rpm |
| Idle speed | 1000–1100 rpm |
| Fuel consumption (reference data) | 2.6 L/h @5500 rpm |
| Engine type | 4-stroke, SOHC, in-line 2 |
| Displacement | 212 cm³ |
| Bore × stroke | 56,0 × 43,0 mm |
| Compression ratio | 9,4:1 |
| Fuel system | 1 carburettor |
| Lubrication | Wet sump |
| Engine oil capacity | 0,8 L |
| Ignition | CDI |
| Spark plug | BR6HS-10 |
| Alternator | 6 A |
| Trim | 4 positions |
| Gear ratio | 2,08 (27/13) |
| Gear shift | F-N-R |
| Shaft lengths in the family | S, L |
| Overall height (S shaft) | 1008 mm |
| Transom height (S shaft) | 431 mm |
| Beam | MH: 373 mm, M: 333 mm |
| Weight (dry) | 38–41 kg |
| Steering angle | 43° each way |
Source: Yamaha Product Information Guide 2026 (F6D family). Fuel consumption — manufacturer’s reference data.
