lx188John Deere LX188 Engine Repair Specifications Cylinder Block Cylinder compression ..... 12.0 kgcm2 (170 psi) Cylinder Bore Standard I.D ..... 66.98-67.00 mm (2.637-2.638 in.) Cylinder Bore Maximum I.D ..... 67.06 mm (2.640LX172, LX173, LX176, LX178, LX186 & LX188 Lawn Tractors TECHNICAL MANUAL John Deere Lawn & Grounds Care Division TM1492 (31MAY96) Litho in U.S.A 2.