Yamaha 25DM 2-stroke engine specs
| Engine Model: Yamaha 25DM |
| Engine Type: 2-stroke 2-cylinder gasoline outboard engine |
| Total Displacement: 26.2 cu.in (430 cc) |
| Rated Engine Power: 25 Hp (18.4 kW) at 5500 rpm |
| Fuel System: Carburetor |
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Engine Model ................ Yamaha 25DM
Engine Type ................ 2-stroke two-cylinder gasoline outboard engine
Number of Cylinders ................ 2
Displacement, cu.in (cc) ................ 26.2 (430)
Cylinder Bore, in (mm) ................ 2.64 (67.0)
Piston Stroke, in (mm) ................ 2.40 (61.0)
Maximum Engine Power, hp (kW) ................ 25.0 (18.4)
Maximum Engine Speed, rpm ................ 4500-5500
Lubrication System ................ Engine oil and gasoline mixture
Exhaust System ................ Through hub exhaust
Cooling System ................ Water cooling
Ignition System ................ CDI
Starting System ................ Manual
Electrical System Rating, Volts ................ 12
Overall Length, in (mm) ................ 23.6 (600)
Overall Width, in (mm) ................ 14.2 (360)
Overall Height (Short Shaft), in (mm) ................ 43.5 (1105)
Transom Height (Short Shaft), in (mm) ................ 15 (381)
Outboard Weight (Short Shaft), lbs (kg) ................ 103.5 (47.0)
Fuel System Type ................ Carburetor
Fuel Type ................ Unleaded gasoline (86 octane minimum)
Fuel Tank Capacity, gal (L) ................ 6.4 (24.0)
Gear Shift ................ F-N-R
Gear Ratio ................ 1.84:1
Gear Oil Capacity, qts (L) ................ 0.19 (0.18)
Trim System ................ Manual Trim and Tilt
Transom Height (Short Shaft), in (mm) ................ 15 (381)
Steering System ................ Tiller handle
Diameter, in (mm) ................ 9.9 (252)
Pitch, in (mm) ................ 8 (203), 9 (228), 10.5 (267), 11.25 (286), 13 (330), 14 (356)
Number Of Blade ................ 3
Material ................ Aluminum
Engine Fuel Type ................ Unleaded gasoline (86 octane minimum)
Engine Oil Type ................ Yamalube 2-stroke outboard motor oil or TC-W certified outboard oil
Gear Lubricant Type ................ Hypoid Gear Oil or API GL3, SAE 90
Gearcase Capacity, qts (L) ................ 0.19 (0.18)
Spark Plug Type ................ NGK B7HS
Spark Plug Gap, in (mm) ................ 0.020-0.024 (0.5-0.6)
Check Gear Oil ................ Every 50 hours
Check Fuel Lines ................ Every 100 hours
Clean Fuel Tank ................ Every 100 hours
Check Fuel Filter ................ Every 100 hours
Check Carburetor ................ Every 100 hours
Check Spark Plug ................ Every 100 hours
Ajust Ignition Timing ................ Every 100 hours
Check Propeller ................ Every 100 hours
Change Gear Oil ................ Every 100 hours
Check Cooling System ................ Every 100 hours
Replace Spark Plug ................ Every 200 hours
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