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Cub Cadet 1811 Engine

Cub Cadet 1811 Engine Specifications

Engine Model ........... Kohler Magnum M18
Engine Type ........... Gasoline, 4-cycle twin cylinder air-cooled
Number of Cylinders ........... 2
Displacement, cc (cu.in) ........... 691.3 (42.2)
Engine Bore, mm (in) ........... 79 (3.12)
Engine Stroke, mm (in) ........... 70 (2.75)
Rated Engine Power, hp (kW) ........... 18.0 (13.4)
Rated Engine Speed, rpm ........... 3600
Idle Speed, rpm ........... 1200
Compression ........... 6.0:1
Fuel System Type ........... Carburetor
Carburetor Model ........... Kohler or Walbro
Carburetor Type ........... Adjustable main jet or fixed jet
Fuel Pump Type ........... Mechanical
Fuel Filter Type ........... In-line
Governor Type ........... Mechanical
Lubrication ........... Full pressure
Oil filter ........... Full-flow type
Air Cleaner ........... Replaceable, paper element
Ignition Type ........... Electronic
Electrical System Rating, Volts ........... 12
Starter Type ........... Electric

Cub Cadet 1811 Engine Maintenance Data

Valve Adjustment

Intake Valve Clearance, mm (in) ........... 0.08-0.16 (0.003-0.006)
Exhaust Valve Clearance, mm (in) ........... 0.28-0.35 (0.011-0.014)
Exhaust/Intake Valve Minimum Lift (Zero Lash), mm (in) ........... 6,9322 (0,274)
Intake Valve Stem O.D (Minimum), mm (in) ........... 7,85059 (0,3103)
Exhaust Valve Stem O.D (Minimum), mm (in) ........... 7,81264 (0,3088)

Engine Oil and Filters

Engine Oil Type (Summer Time) ........... SAE 10W-30
Engine Oil Type (Winter Time) ........... SAE 5W-20, 5W-30
Oil Classification (API) ........... SG, SH, SJ or higher.
Oil Capacity (without filter), L (qts) ........... 1.6 (1.7)
Oil Capacity (with filter), L (qts) ........... 1.4 (1.5)
Oil Filter Part Number ........... 12 050 01-S
Air Filter Part Number ........... 45 083 02-S

Kohler Carburetor Adjustment

Main Fuel ........... 2-1/2 turns
Low Idle ........... 1 turn
Low Idle Speed, rpm ........... 1200±75
High Idle Speed, rpm ........... 3600±50

Walbro Carburetor Adjustment

Main Fuel (Fixed Jet) ........... Not adjust
Main Fuel (Adjustable Jet) ........... 1-1/4 turns
Low Idle ........... 1-1/4 turns
Low Idle Speed, rpm ........... 1200±75
High Idle Speed, rpm ........... 3600±50

Ignition System

Spark Plug Type ........... Champion RV17YC
Spark Plug Gap, mm (in) ........... 0.89 (0.035)
Module Air Gap, mm (in) ........... 0.2-0.3 (0.008-0.012)
Spark Plug Torque, Nm (ft-lbs) ........... 13.5-20.3 (10-15)

Cub Cadet 1811 Engine Service Specifications

Cylinder Block

Cylinder Bore Inside Diameter (Std), mm (in) ........... 79,075-79,050 (3,1255-3,1245)
Cylinder Bore Inside Diameter (Max. Wear Limit), mm (in) ........... 79,1384 (3,128)
Cylinder Bore (Max Out of Round), mm (in) ........... 0,0506 (0,002)
Cylinder Bore (Max. Taper), mm (in) ........... 0,03795 (0,0015)
Camshaft End Play, mm (in) ........... 0,0759-0,3289 (0,003-0,013)
Connecting Rod to Crankpin Clearance (Std), mm (in) ........... 0,0304-0,0608 (0,0012-0,0024)
Connecting Rod to Crankpin Clearance (Wear Limit), mm (in) ........... 0,07337 (0,0029)
Connecting Rod to Piston Pin Clearance (Std), mm (in) ........... 0,0152-0,0278 (0,0006-0,0011)
Connecting Rod Small End I.D. (Std), mm (in) ........... 15,825-15,833 (0,6255-0,6258)

Cylinder Head and Valves

Cylinder Head (Max. Out of Flatness), mm (in) ........... 0,0759 (0,003)
Valves Guide Reamer Size, mm (in) ........... 7,90625 (0,3125)
Intake Valve Tappet Clearance (Cold), mm (in) ........... 0,076-0,152 (0,003-0,006)
Exhaust Valve Tappet Clearance (Cold), mm (in) ........... 0,278-0,354 (0,011-0,014)
Intake Valve Minimum Lift (Zero Lash), mm (in) ........... 6,9322 (0,274)
Exhaust Valve Minimum Lift (Zero Lash), mm (in) ........... 6,9322 (0,274)
Intake Valve Stem O.D (Minimum), mm (in) ........... 7,85059 (0,3103)
Exhaust Valve Stem O.D (Minimum), mm (in) ........... 7,81264 (0,3088)
Nominal Valve Seat Angle (earlier), deg ........... 45
Nominal Valve Seat Angle (later), deg ........... 30
Intake Valve Guide I.D (Max. Wear), mm (in) ........... 0,1265 (0,005)
Exhaust Valve Guide I.D (Max. Wear), mm (in) ........... 0,1771 (0,007)

Piston and Piston Rings

Piston Thrust Face O.D (Std), mm (in) ........... 78,961-78,944 (3,1210-3,1203)
Piston Thrust Face O.D (Max. Wear Limits), mm (in) ........... 78,8879 (3,1181)
Piston Thrust Face to Bore Clearance (Std), mm (in) ........... 0,0886-0,1312 (0,0035-0,0052)
Piston Ring End Gap (Std Bore), mm (in) ........... 0,253-0,582 (0,010-0,023)
Piston Ring End Gap (Used Bore), mm (in) ........... 0,8096 (0,032)
Max. Piston Ring Side Clearance, mm (in) ........... 0,1518 (0,006)
Piston Pin Outside Diameter, mm (in) ........... 15,805-15,810 (0,6247-0,6249)

Crankshaft

Crankshaft Main PTO and Flywheel End O.D (Std), mm (in) ........... 44,052-44,078 (1,7412-1,7422)
Crankshaft Main PTO and Flywheel End O.D (Max Wear Limit), mm (in) ........... 44,03971 (1,7407)
Crankshaft Max. Out of Round (Sleeve), mm (in) ........... 0,01265 (0,0005)
Crankshaft Max. Taper (Sleeve), mm (in) ........... 0,0253 (0,001)
Crankshaft Main Running Clearance (Max Std), mm (in) ........... 0,12397 (0,0049)
Crankshaft Main Running Clearance (Wear Limit), mm (in) ........... 0,14927 (0,0059)
Crankshaft Main New Sleeve Bearing I.D (Installed), mm (in) ........... 44,121-44,176 (1,7439-1,7461)
Crankpin O.D (Std), mm (in) ........... 34,757-34,744 (1,3738-1,3733)
Crankpin O.D (Max. Wear Limit), mm (in) ........... 34,73184 (1,3728)
Crankpin (Max. Out of Round), mm (in) ........... 0,01265 (0,0005)
Crankpin (Max. Taper), mm (in) ........... 0,0253 (0,001)
Crankshaft End Play, mm (in) ........... 0,051-0,354 (0,002-0,014)

Cub Cadet 1811 Engine Tightening Torque Specs

Cylinder Head, Nm (ft-lbs) ........... 20.3-27.1 (15-20)
Connecting Rods (New), Nm (ft-lbs) ........... 15.8 (11.7)
Connecting Rods (Used), Nm (ft-lbs) ........... 11.2 (8.3)
Flywheel Screw, Nm (ft-lbs) ........... 54.0 (40.0)
Manifold Screw/Nut, Nm (ft-lbs) ........... 16.9 (12.5)
Fuel Pump Mounting Screws, Nm (ft-lbs) ........... 4.2-5.1 (3.1-3.8)
Ignition Module, Nm (ft-lbs) ........... 3.6 (2.7)
Spark Plugs, Nm (ft-lbs) ........... 13.5-20.3 (10-15)
Oil Filter, Nm (ft-lbs) ........... 5.7-9.1 (4.2-6.7)
Closure Plate, Nm (ft-lbs) ........... 16.9 (12.5)

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