________________________________________________________________________________

John Deere 314 Engine

John Deere 314 Engine Specifications

Engine Model ............ Kohler K321AQS
Engine Type ............ 4-Cycle, single cylinder air-cooled gasoline
Number of Cylinders ............ 1
Displacement, L (cu in) ............ 0.512 (31.3)
Engine Bore, mm (in) ............ 89.0 (3.50)
Engine Stroke, mm (in) ............ 82.6 (3.25)
Maximum Horse Power, hp (kW) ............ 14.0 (10.5)
Rated Engine Speed, rpm ............ 3600
Fuel System ............ Carburetor
Carburetor Model ............ Kohler/Walbro
Carburetor Type ............ Fixed main jet or adjustable main jet
Lubrication System ............ Splash type
Cooling System ............ Forced-air
Ignition System ............ Magneto or battery
Starter Type ............ Recoil or electric

John Deere 314 Engine Maintenance Data

Valve Adjustment

Intake Valve Clearance ............ 0.20-0.25 (0.008-0.010)
Exhaust Valve Clearance ............ 0.43-0.48 (0.017-0.019)
Intake Valve Seat Width, mm (in) ............ 0.936-1.139 (0.037-0.045)
Exhaust Valve Seat Width, mm (in) ............ 0.936-1.139 (0.037-0.045)
Valve Face Angle, degrees ............ 45

Engine Oil and Filters

Engine Oil Type (Summer) ............ SAE 30W
Engine Oil Type (Winter) ............ SAE 5W-20, 5W-30
Oil Classification ............ API SF, SG
Oil Capacity, L (qts) ............ 2.2 (2.25)
Oil Filter Part Number ............ AM101207
Air Filter Part Number ............ AM31034

Kohler Carburetor Adjustment

Low Idle Fuel ............ 2-1/2 turns
High Idle Fuel ............ 3-1/4 turns
Low Idle Speed, rpm ............ 1200±75
High Idle Speed, rpm ............ 3600±50

Walbro Carburetor Adjustment

Low Idle Fuel ............ 1-1/8 turns
High Idle Fuel ............ 1-1/4 turns
Low Idle Speed, rpm ............ 1200±75
High Idle Speed, rpm ............ 3600±50

Ignition System

Spark Plug Type ............ Champion RH10
Spark Plug Size, mm (in) ............ 14.0 (0.553)
Spark Plug Gap, mm (in) ............ 0.65 (0.0256)
Breaker Point Gap (Nominal), mm (in) ............ 0.50 (0.020)

John Deere 314 Engine Service Specifications

Cylinder Block

Sleeve Internal Diameter, mm (in) ............ 88.9127-88.8873 (3.5005-3.4995)
Piston Skirt Outside Diameter, mm (in) ............ 88.7501-88.7425 (3.4941-3.4938)
Top Compression Ring End Gap, mm (in) ............ 0.177-0.432 (0.007-0.017)
Second Compression Ring End Gap, mm (in) ............ 0.177-0.432 (0.007-0.017)
Connecting Rod Small End Inside Diameter, mm (in) ............ 22.2428-22.2504 (0.8757-0.876)
Piston Pin Outside Diameter, mm (in) ............ 22.2300-22.2352 (0.8752-0.8754)

Valves

Valve Clearance (Intake), mm (in) ............ 0.20-0.25 (0.0079-0.0099)
Valve Clearance (Exhaust), mm (in) ............ 0.43-0.48 (0.0169-0.0189)
Intake Valve Head Diameter, mm (in) ............ 34.798-35.052 (1.370-1.380)
Exhaust Valve Head Diameter, mm (in) ............ 28.448-28.702 (1.120-1.130)
Stem Outside Diameter (Intake, Std), mm (in) ............ 7.887-7.899 (0.3105-0.3110)
Stem Outside Diameter (Exhaust, Std), mm (in) ............ 7.833-7.851 (0.3084-0.3091)
Valve Guide Inside Diameter (Intake, Exhaust), mm (in) ............ 7.894-7.919 (0.312-0.313)
Valve Seat Angle (Intake, Exhaust), degrees ............ 89
Valve Seat Width (Intake), mm (in) ............ 0.936-1.139 (0.037-0.045)
Valve Seat Width (Exhaust), mm (in) ............ 0.936-1.139 (0.037-0.045)
Valve Guide Depth (Intake), mm (in) ............ 40.126 (1.586)
Valve Guide Depth (Exhaust), mm (in) ............ 37.874 (1.497)
Valve Face Angle (Intake, Exhaust), degrees ............ 45

John Deere 314 Engine Tightening Torque Specs

Cylinder Head Bolts, Nm (ft-lbs) ............ 34-41 (25-30)
Flywheel, Nm (ft-lbs) ............ 68-81 (50-60)
Spark Plug, Nm (ft-lbs) ............ 25-30 (18-22)
Connecting Rod, Nm (ft-lbs) ............ 32.1 (23.8)
Governor Bushing, Nm (ft-lbs) ............ 11.2-13.6 (8.3-10.1)
Fuel Pump Mounting Screws, Nm (ft-lbs) ............ 4.2-5.1 (3.1-3.8)

JOHN DEERE TRACTORS ATTACHMENTS
420	430	455	790	990
X300	X320	X330	X350	X475
X485	X500	X540	X570	X590
X700	X720	X738	X758	1023E
2025R	2210	2520	3025E	3032E
3038E	3038R	3039R	3046R	3203
3320	3520	4052R	4066R	4100
4105	4115	4200	4310	4320
4400	4410	4520	4600	4720

JD TRACTORS TROUBLESHOOTING
2640	3040	3310	3650	4100
5050D	5090R	5410	6105R	7200R
E130	L111	LA110	LT155	X300R