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| MODEL | BS-170F | BS178FS | BS-186FM | BS-186FP | BS186F | BS-186FS | BS-186FE | BS-186FAM | BS-186FAP | BS-186FA | BS-186FAM-LS | BS-188FM | BS-188F |
| Reduction Gear | Marine | Reduction Gear | Marine | Reduction Gear | Marine | ||||||||
| Engine Type | Aircooled, 4 stroke, Vertical, Single Cylinder, Direct Injection Diesel Engine | Aircooled, 4 stroke, Vertical, Single Cylinder, Direct Injection Diesel Engine | Aircooled, 4 stroke, Vertical, Single Cylinder, Direct Injection Diesel Engine | Aircooled, 4 stroke, Vertical, Single Cylinder, Direct Injection Diesel Engine | Aircooled, 4 stroke, Vertical, Single Cylinder, Direct Injection Diesel Engine | Aircooled, 4 stroke, Vertical, Single Cylinder, Direct Injection Diesel Engine | Aircooled, 4 stroke, Vertical, Single Cylinder, Direct Injection Diesel Engine | Aircooled, 4 stroke, Vertical, Single Cylinder, Direct Injection Diesel Engine | Aircooled, 4 stroke, Vertical, Single Cylinder, Direct Injection Diesel Engine | Aircooled, 4 stroke, Vertical, Single Cylinder, Direct Injection Diesel Engine | Aircooled, 4 stroke, Vertical, Single Cylinder, Direct Injection Diesel Engine | Aircooled, 4 stroke, Vertical, Single Cylinder, Direct Injection Diesel Engine | Aircooled, 4 stroke, Vertical, Single Cylinder, Direct Injection Diesel Engine |
| Displacement (cc) | 211 | 296 | 406 | 406 | 406 | 406 | 406 | 418 | 418 | 418 | 418 | 435 | 435 |
| Bore x Stroke (mm) | 70 x 55 | 78 x 62 | 86 x 70 | 86 x 70 | 86 x 70 | 86 x 70 | 86 x 70 | 86x72 | 86x72 | 86x72 | 86x72 | 88x75 | 88x75 |
| Engine Speed (rpm) | 3600 | 1800 | 3600 | 3600 | 3600 | 1800 | 3600 | 3600 | 3600 | 3600 | 1800 | 3600 | 3600 |
| Max. Output (HP) | 5 | 7 | 10 | 10 | 10 | 10 | 10 | 12 | 12 | 12 | 12 | 14 | 14 |
| Fuel Consumption (G/Hp.hr) | <295 | <280 | <270 | <270 | <270 | <270 | <270 | <270 | <270 | <270 | <270 | <270 | <270 |
| Starting Systen | Recoil Start | Recoil Start | Rope Pull Start Pulley Type | Rope Pull Start Pulley Type | Recoil Start | Recoil Start | Key and Recoil Start | Rope Pull Start Pulley Type | Rope Pull Start Pulley Type | Recoil Start | Rope Pull Start Pulley Type | Rope Pull Start Pulley Type | Recoil Start |
| Fuel Tank Capacity (L) | 2.5 | 3.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 |
| Lube Oil Capacity (L) | 0.75 | 1.1 | 1.65 | 1.65 | 1.65 | 1.65 | 1.65 | 1.65 | 1.65 | 1.65 | 1.65 | 1.65 | 1.7 |
| Oil Type | SAE40 | SAE40 | SAE40 | SAE40 | SAE40 | SAE40 | SAE40 | SAE40 | SAE40 | SAE40 | SAE40 | SAE40 | SAE40 |
| Dimension LxWxH (mm) | 415x385x470 | 480x465x525 | 510x475x565 | 510x475x565 | 510x475x565 | 510x475x565 | 510x475x565 | 510x475x565 | 510x475x565 | 510x475x565 | 510x475x565 | 510x475x565 | 510x475x565 |
| N.W./G.W/(kg) | 25/30 | 31/36 | 50/55 | 50/55 | 50/55 | 50/55 | 50/55 | 50/55 | 50/55 | 50/55 | 50/55 | 50/55 | 50/55 |