2003 Johnson ST 55 HP WRL 2 Stroke Commercial Service Manual, PN 5005483, Page 27Get this manual
SPECIAL TOOLS AND SERVICE SPECIFICATIONS TECHNICAL DATA
TECHNICAL DATA
Full Throttle Operating Range RPM Power Idle RPM in Gear Weight Lubrication
4500-5500 55 HP (41.0 kw) 5000 RPM 800 25 191 Ibs(86.6 kg)
EvinrudeJohnson XD25 formula outboard oilRefer to Engine Lubricant
In-line cylinder 45 cu in(737 cm 3) 3.1875 in(80.96 mm) 2.820 in(71.63 mm) 3.1870 to 3.1880 in(80.95 to 80.98 mm) To bore oversize, add piston oversize dimension to standard bore 1.4986 to 1.4991 in(38.06 to 38.08 mm) 1.3745 to 1.3749 in(34.91 to 34.92 mm) 1.1810 to 1.1815 in(30.00 to 30.01 mm) 1.1823 to 1.1828 in(30.03 to 30.04 mm) 0.010 to 0.022 in(0.25 to 0.56 mm) PIN 382861 50:1 fueloil mixture Two single-throat carburetor, float feed Adjustable low speed Fixed intermediate and high speed Refer to FUEL SYSTEM section Manual Primer Float gauge, PIN 324891 18 to 58 in(28 to 41 mm) Regular unleaded, plus grade unleaded, premium unleaded gasolines Any of the above gasolines with 10 Ethanol or Methanol with co-solvents 87 AKI (R+M)2 or 90 RON