F-head 134 CI (2.2 liter) 4-Cylinder Hurricane Engine Specs 

Specifications
•	Spark plug gap: 0.030 in. (0.762 mm) 
•	Spark plug torque: 25-33 lbs. ft. (34-44 Nm) 
•	Firing order: 1-3-4-2 
•	Distributor rotation: Counterclockwise 
•	Point gap: 0.020 in. (Prestolite) 
•	Dwell angle: 42 degrees 
•	Ignition timing: 5 degrees BTDC 
 
•	Bore and stroke :3 1/8 in. x 4 3/8 in. (79.37 mm x 111.12 mm) 
•	SAE Horsepower: 15.63 
•	Weight: 470 lbs. with fluids (Jeep Bible, Granville King) 
•	Max. Horsepower: 72 @ 4000 R.P.M. (71 @ 4000 R.P.M. on military M606's) 
•	Torque: 114 lbs. ft. (15.7 kg-m) @ 2000 R.P.M. (111 lbs. ft. @ 2200 R.P.M. on military M606's) 
•	Compression pressure: 120-130 psi (8.4-9.2 kg-cm2) 
•	Compression ratio: 6.9:1 (7.4:1 high altitude option). 
 
•	Valves: 2-in. intake valves in head, exhaust valves in block. 
•	Valve clearances: 
   Intake: 0.018 in. 
   Exhaust: 0.016 in. 
•	Idle speed: 
  YF-938-SD carburetor: 600 rpm 
  YF-4002-S carburetor: 650-700 rpm 
  YF-4366-S, YF-4941-S, or YF-6115-S: 
     IAY-4401A distributor: 650-700 rpm 
     IAY-4401B distributor: 700-750 rpm 
Part Numbers
•	Rotor cap: Prestolite IAT 1041 
•	Ignition points: Standard AL 4556P or #AL4556XP (the difference between P and XP is the quality.) 
•	Points: NAPA CS725A or CS709 
•	Condenser: NAPA AL 869 or AL 868 (with wire or with copper strap) 
•	Cap: NAPA AL70 
•	Rotor: NAPA AL69 
•	Fan belt: Dayco 22425. 
•	Oil Filter: Fram C-3P. Wix 51010 or NAPA 1010 or 1006 (1011 is same filter with 2 different size gaskets.) 1980's Mercedes-Benz diesels used the same filter. 
•	Sparkplugs: Autolite A7, AC Delco 45 or Champion J-8. Note: Current Autolite replacement number is 295. A current Champion 841 (J8C) is suitable. AC has discontinued the 45 plug but hardware stores in small towns may still have stock from the 70's. Modern resistor-type plugs don't perform well on older engines. 
•	6-volt Battery: Auto-Lite 1M-100, 100 AmpHour (H 8 5/8" x W 7" x L 8 23/32") 
•	12-volt Battery: Auto-Lite 11-HS, 50 AmpHour (H 9 7/32" x W 6 25/32" x L 10 15/64")