________________________________________________________________________________

Cub Cadet 1863 Engine

Cub Cadet 1863 Engine Specifications

Engine Model - Kohler Command CH18S
Engine Type - Gasoline, 4-cycle V-Twin air-cooled
Number of Cylinders - 2
Displacement, cc (cu.in) - 624 (38.0)
Engine Bore, mm (in) - 77.0 (3.03)
Engine Stroke, mm (in) - 67.0 (2.64)
Rated Engine Power, hp (kW) - 18.0 (13.4)
Rated Engine Speed, rpm - 3600
Maximum Torque, Nm (ft-lbs) - 44.4 (32.8)
Torque Speed, rpm - 2200
Compression - 8.5:1
Carburetor Model - Keihin
Carburetor Type - One-Barrel, fixed main jet
Fuel Pump Type - Pulse/mechanical
Fuel Filter - In-line
Governor - Mechanical
Lubrication - Full pressure
Oil filter - Full-flow type
Air Cleaner - Replaceable, paper element
Electrical System Rating, Volts - 12
Starter Type - Electric

Cub Cadet 1863 Engine Maintenance Data

Valve Adjustment

Intake Valve Clearance (Cold), mm (in) - 0.038-0.076 (0.0015-0.0030)
Exhaust Valve Clearance (Cold), mm (in) - 0.050-0.088 (0.0020-0.0035)
Hydraulic Valve Lifter to Crankcase Clearance, mm (in) - 0.0241-0.0501 (0.0009-0.0020)
Intake Valve Guide Depth, mm (in) - 4.00 (0.1575)
Exhaust Valve Guide Depth, mm (in) - 6.50 (0.2559)

Engine Oil and Filters

Engine Oil Type (Summer Time) - SAE 10W-30
Engine Oil Type (Winter Time) - SAE 5W-30
Oil Classification - API SJ or higher
Oil Capacity (w/o Filter), L (qts) - 1.6 (1.7)
Oil Capacity (with New Filter), L (qts) - 1.8 (1.9)
Oil Filter Part Number - 28-050-01-S
Air Filter Part Number - 24-083-03-S

Carburetor Adjustment

Main Fuel - 2-1/2 turns
Idle Fuel - 3/4 to 1 full turn
Low Idle Speed, rpm - 1200±75
High Idle Speed, rpm - 3600±50

Ignition System

Spark Plug Type - Champion RC12YC
Spark Plug Gap, mm (in) - 0.76 (0.030)
Module Air Gap, mm (in) - 0.28-0.33 (0.011-0.013)
Thread Size, mm (in) - 14 (0.55)
Reach, mm (in) - 19.1 (0.75)
Spark Plug Torque, Nm (ft-lbs) - 27 (20)

Cub Cadet 1863 Engine Service Specifications

Cylinder Block

Cylinder Bore Inside Diameter (Standard), mm (in) - 77.000-77.025 (3.0315-3.0325)
Cylinder Bore Inside Diameter (Max. Wear Limit), mm (in) - 77.063 (3.0340)
Cylinder Bore (Max. Out of Round), mm (in) - 0.12 (0.0047)
Cylinder Bore Max. Taper, mm (in) - 0.05 (0.0020)
Cylinder Head Max. Out of Flatness, mm (in) - 0.076 (0.003)
Camshaft End Play (W/Shim), mm (in) - 0.076-0.127 (0.0030-0.0050)
Camshaft Clearance, mm (in) - 0.025-0.063 (0.0010-0.0025)
Camshaft Bore Inside Diameter, mm (in) - 20.000-20.025 (0.7874-0.7884)
Camshaft Bearing Surface Outside Diameter, mm (in) - 19.962-19.975 (0.7859-0.7864)
Connecting Rod to Crankpin Clearance, mm (in) - 0.030-0.055 (0.0012-0.0022)
Connecting Rod to Crankpin Side Clearance, mm (in) - 0.26-0.63 (0.0102-0.0248)
Connecting Rod to Piston Pin Clearance, mm (in) - 0.015-0.028 (0.0006-0.0011)

Valves

Intake Valve Stem to Valve Guide Clearance, mm (in) - 0.038-0.076 (0.0015-0.0030)
Exhaust Valve Stem to Valve Guide Clearance, mm (in) - 0.050-0.088 (0.0020-0.0035)
Intake Valve Guide Inside Diameter, mm (in) - 7.038-7.058 (0.2771-0.2779)
Exhaust Valve Guide Inside Diameter, mm (in) - 7.038-7.058 (0.2771-0.2779)
Valve Guide Reamer Size (Standard), mm (in) - 7.048 (0.2775)
Valve Guide Reamer Size (0.25 Oversize), mm (in) - 7.298 (0.2873)
Intake Valve Minimum Lift, mm (in) - 8.07 (0.3177)
Exhaust Valve Minimum Lift, mm (in) - 8.07 (0.3177)
Nominal Valve Face Angle, degrees - 45
Valve Seat Angle (Intake/Exhaust), degrees - 89
Intake Valve Insert Outside Diameter, mm (in) - 36.987-37.013 (1.4562-1.4572)
Exhaust Valve Insert Outside Diameter, mm (in) - 32.987-33.013 (1.2987-1.2997)
Intake Valve Head Diameter, mm (in) - 33.37-33.63 (1.3138-1.3240)
Exhaust Valve Head Diameter, mm (in) - 29.37-29.63 (1.1563-1.1665)
Intake Valve Stem Diameter, mm (in) - 6.982-7.000 (0.2749-0.2756)
Exhaust Valve Stem Diameter, mm (in) - 6.970-6.988 (0.2744-0.2751)

Crankshaft

Crankshaft End Play (Free), mm (in) - 0.070-0.590 (0.0028-0.0230)
Crankshaft Bore (In Crankcase), mm (in) - 40.965-41.003 (1.6128-1.6143)
Crankshaft Bore (In Closure Plate), mm (in) - 40.987-40.974 (1.6136-1.6131)
Crankshaft Bore to Crankshaft Clearance, mm (in) - 0.039-0.074 (0.0015-0.0029)
Flywheel End Main Bearing Journal Outside Diameter, mm (in) .. 40.913-40.935 (1.6107-1.6116)
Flywheel End Main Bearing Journal Max. Taper, mm (in) - 0.022 (0.0009)
Closure Plate End Main Bearing Journal Outside Diameter, mm (in) 40.913-40.935 (1.6107-1.6116)
Closure Plate End Main Bearing Journal Max. Taper, mm (in) - 0.022 (0.0009)
Connecting Rod Journal Outside Diameter, mm (in) - 35.955-35.973 (1.4156-1.4163)
Connecting Rod Journal Max. Taper, mm (in) - 0.018 (0.0007)
Crankshaft T.I.R (PTO End, Crank in Engine), mm (in) - 0.279 (0.0110)
Crankshaft T.I.R (Entire Crank, in V-Blocks), mm (in) - 0.10 (0.0039)

Piston and Piston Rings

Piston to Piston Pin Clearance, mm (in) - 0.006-0.017 (0.0002-0.0007)
Piston Pin Bore Inside Diameter, mm (in) - 17.006-17.012 (0.6695-0.6698)
Piston Pin Outside Diameter, mm (in) - 16.995-17.000 (0.6691-0.6693)
Top Compression Ring Groove Clearance, mm (in) - 0.040-0.080 (0.0016-0.0031)
Middle Compression Ring Groove Clearance, mm (in) - 0.040-0.080 (0.0016-0.0031)
Oil Control Ring Groove Clearance, mm (in) - 0.060-0.202 (0.0024-0.0080)
Top and Middle Compression Ring End Gap, mm (in) - 0.25-0.45 (0.0100-0.0177)
Piston Thrust Face Outside Diameter (Std), mm (in) - 76.967-76.985 (3.0302-3.0309)
Piston Thrust Face Outside Diameter (Wear Limit), mm (in) - 76.840 (3.0252)
Piston Thrust Face to Cylinder Bore Clearance, mm (in) - 0.014-0.057 (0.0005-0.0022)

Cub Cadet 1863 Engine Tightening Torque Specs

Cylinder Head Nut, Nm (ft-lb) - 16.9-33.9 (12.5-25.1)
Cylinder Head Bolt, Nm (ft-lb) - 22.6-41.8 (16.7-30.8)
Rocker Arm Screw, Nm (ft-lb) - 11.3 (8.3)
Connecting Rod Cap, Nm (ft-lb) - 11.3 (8.3)
Flywheel Retaining Screw, Nm (ft-lb) - 66.4 (49.1)
Intake Manifold Mounting, Nm (ft-lb) - 7.4 (5.5)
Carburetor Mounting Nut, Nm (ft-lb) - 6.2-7.3 (4.6-5.4)
Closure Plate, Nm (ft-lb) - 24.4 (18.1)
Oil Drain Plug, Nm (ft-lb) - 13.6 (10.1)
Governor Lever Nut, Nm (ft-lb) - 6.8 (5.1)
Ignition Module, Nm (ft-lb) - 4.0-6.2 (2.9-4.6)
Muffler Retaining Nut, Nm (ft-lb) - 24.4 (18.1)
Fuel Pump Screw, Nm (ft-lb) - 2.3 (1.7)
Spark Plug, Nm (ft-lb) - 27 (20.1)

CUB CADET TRACTORS TROUBLESHOOTING
1050	1863	2166	2182	2186
3184	3205	GT1554	GT2550	GTX2100
LT1040	LT1042	LT1045	LT1046	LT1050
LT2180	LTX1040	LTX1042	LTX1045	LTX1046
LTX1050	SLTX1054	XT1 LT42	XT1 LT46	XT3 GSX