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Cub Cadet LT1046 Engine
Cub Cadet LT1046 Engine Specifications
Engine Model - Kohler Courage SV720
Engine Type - Gasoline, 4-cycle 2-cylinder, OHV, air-cooled
Number of Cylinders - V-Twin
Displacement, cc (cu.in) - 725 (44.0)
Engine Bore, mm (in) - 83.0 (3.27)
Engine Stroke, mm (in) - 67.0 (2.64)
Rated Engine Power, hp (kW) - 23.0 (17.2)
Rated Engine Speed, rpm - 3600
Maximum Torque, Nm (ft-lbs) - 58.3 (43.1)
Torque Speed, rpm - 2800
Compression - 9.0:1
Carburetor Model - Nikki or Keihin
Carburetor Type - One-Barrel, fixed main jet
Fuel Pump - Pulse type
Fuel Filter - In-line
Governor - Mechanical
Lubrication - Full pressure
Oil filter - Full-flow type
Air Cleaner - Replaceable, paper element
Oil Capacity, L (qts) - 1.9 (2.0)
Electrical System Rating, Volts - 12
Starter Type - Electric
Battery Rating - 12V, 400 CCA
Cub Cadet LT1046 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)
Intake Valve Stem Diameter - 6.982-7.000 mm (0.2749-0.2756 in.)
Exhaust Valve Stem Diameter - 6.970-6.988 mm (0.2744-0.2751 in.)
Engine Oil and Filters
Engine Oil Type (Summer) - SAE 10W-30
Engine Oil Type (Winter) - 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 - 12-050-01-S
Air Filter Part Number - 32-083-03-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) - 24.4-29.8 (18-22)
Cub Cadet LT1046 Engine Service Specifications
Cylinder Block
Cylinder Bore I.D (Standard) - 83.031-83.006 mm (3.2689-3.2679 in.)
Cylinder Bore I.D (Max. Wear Limit) - 83.069 mm (3.2704 in.)
Cylinder Bore (Max. Out of Round) - 0.12 mm (0.0047 in.)
Cylinder Bore Max. Taper - 0.05 mm (0.0020 in.)
Cylinder Head Max. Out-of-Flatness - 0.076 mm (0.003 in.)
Camshaft End Play (With Shim) - 0.076-0.127 mm (0.0030-0.0050 in.)
Camshaft Clearance - 0.025-0.063 mm (0.0010-0.0025 in.)
Camshaft Bore I.D - 20.000-20.025 mm (0.7874-0.7884 in.)
Camshaft Bearing Surface O.D - 19.962-19.975 mm (0.7859-0.7864 in.)
Connecting Rod to Crankpin Clearance - 0.030-0.055 mm (0.0012-0.0022
in.)
Connecting Rod to Crankpin Side Clearance - 0.26-0.63 mm (0.0102-0.0248
in.)
Connecting Rod to Piston Pin Clearance - 0.015-0.028 mm (0.0006-0.0011
in.)
Valves
Valve Tappet to Crankcase Clearance - 0.013-0.073 mm (0.0005-0.0029 in.)
Intake Valve Stem to Valve Guide Clearance - 0.038-0.076 mm
(0.0015-0.0030 in.)
Exhaust Valve Stem to Valve Guide Clearance - 0.050-0.088 mm
(0.0020-0.0035 in.)
Intake Valve Guide I.D - 7.038-7.058 mm (0.2771-0.2779 in.)
Exhaust Valve Guide I.D - 7.038-7.058 mm (0.2771-0.2779 in.)
Valve Guide Reamer Size (Standard) - 7.048 mm (0.2775 in.)
Valve Guide Reamer Size (0.25 mm Oversize) - 7.298 mm (0.2873 in.)
Intake Valve Minimum Lift - 8.07 mm (0.3177 in.)
Exhaust Valve Minimum Lift - 8.07 mm (0.3177 in.)
Nominal Valve Face Angle - 45 deg
Valve Seat Angle (Intake/Exhaust) - 89 deg
Intake Valve Insert O.D - 36.987-37.013 mm (1.4562-1.4572 in.)
Exhaust Valve Insert O.D - 32.987-33.013 mm (1.2987-1.2997 in.)
Intake Valve Guide Depth - 4.00 mm (0.1575 in.)
Exhaust Valve Guide Depth - 6.50 mm (0.2559 in.)
Intake Valve Head Diameter - 33.37-33.63 mm (1.3138-1.3240 in.)
Exhaust Valve Head Diameter - 29.37-29.63 mm (1.1563-1.1665 in.)
Crankshaft
Crankshaft End Play (Free) - 0.070-0.590 mm (0.0028-0.0230 in.)
Crankshaft Bore (In Crankcase) - 40.965-41.003 mm (1.6128-1.6143 in.)
Crankshaft Bore (In Oil Pan) - 40.974-40.987 mm (1.6131-1.6136 in.)
Crankshaft Bore to Crankshaft Clearance - 0.039-0.074 mm (0.0015-0.0029
in.)
Flywheel End Main Bearing Journal O.D - 40.913-40.935 mm (1.6107-1.6116
in.)
Flywheel End Main Bearing Journal Max. Taper - 0.022 mm (0.0009 in.)
Oil Pan End Main Bearing Journal O.D - 40.913-40.935 mm (1.6107-1.6116
in.)
Oil Pan End Main Bearing Journal Max. Taper - 0.022 mm (0.0009 in.)
Connecting Rod Journal O.D - 35.955-35.973 mm (1.4156-1.4163 in.)
Connecting Rod Journal Max. Taper - 0.018 mm (0.0007 in.)
Crankshaft T.I.R (PTO End, Crank in Engine) - 0.279 mm (0.0110 in.)
Crankshaft T.I.R (Entire Crank, in V-Blocks) - 0.20 mm (0.0079 in.)
Piston and Piston Rings
Piston-to-Piston Pin Clearance - 0.006-0.017 mm (0.0002-0.0007 in.)
Piston Pin End I.D - 17.015-17.023 mm (0.6699-0.6702 in.)
Piston Pin Bore I.D - 17.006-17.012 mm (0.6695-0.6698 in.)
Piston Pin O.D - 16.995-17.000 mm (0.6691-0.6693 in.)
Top Compression Ring Groove Clearance (Piston A) - 0.025-0.048 mm
(0.0010-0.0019 in.)
Top Compression Ring Groove Clearance (Piston B) - 0.030-0.070 mm
(0.001-0.0026 in.)
Middle Compression Ring Groove Clearance (Piston A) - 0.015-0.037 mm
(0.0006-0.0015 in.)
Top Compression Ring Groove Clearance (Piston B) - 0.030-0.070 mm
(0.001-0.0026 in.)
Oil Control Ring Groove Clearance (Piston A) - 0.026-0.176 mm
(0.0010-0.0070 in.)
Oil Control Ring Groove Clearance (Piston B) - 0.060-0.190 mm
(0.0022-0.0073 in.)
Top and Middle Compression Ring End Gap (Piston A) - 0.25-0.56 mm
(0.0100-0.0224 in.)
Top Compression Ring End Gap (Piston B) - 0.189-0.277 mm (0.0074-0.0109
in.)
Middle Compression Ring End Gap (Piston B) - 1.519-1.797 mm
(0.0598-0.0708 in.)
Piston Thrust Face O.D (Piston A) - 82.947 mm (3.2656 in.)
Piston Thrust Face O.D (Piston B) - 82.978 mm (3.2668 in.)
Piston Thrust Face to Cylinder Bore Clearance (Piston A) - 0.06-0.100 mm
(0.0023-0.0039 in.)
Piston Thrust Face to Cylinder Bore Clearance (Piston B) - 0.019-0.062
mm (0.0007-0.0024 in.)
Cub Cadet LT1046 Engine Tightening Torque
Specs
Cylinder Head Bolt - 22.6-41.8 Nm (16.7-30.8 ft-lbs.)
Rocker Arm Screw - 11.3 Nm (8.3 ft-lbs.)
Connecting Rod Cap - 11.3 Nm (8.3 ft-lbs.)
Flywheel Retaining Screw - 74.5 Nm (55 ft-lbs.)
Intake Manifold Mounting - 7.4 Nm (5.5 ft-lbs.)
Carburetor Mounting Nut - 6.2-7.3 Nm (4.6-5.4 ft-lbs.)
Oil Drain Plug - 13.6 Nm (10 ft-lbs.)
Oil Pan - 24.4 Nm (18 ft-lbs.)
Governor Lever Nut - 6.8 Nm (5 ft-lbs.)
Ignition Module - 4.0-6.2 Nm (2.9-4.6 ft-lbs.)
Oil Filter - 24.4 Nm (18.1 ft-lbs.)
Fuel Pump Screw - 2.3 Nm (1.7 ft-lbs.)
Spark Plug - 27 Nm (20 ft-lbs.)
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CUB CADET TRACTORS SPECIFICATIONS |
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ENGINES FOR CUB CADET LAWN TRACTORS |
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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 |