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Tecumseh HH60 Engine
General Technical Data
Tecumseh HH60 Engine Specifications
Engine Model ........... Tecumseh HH60
Engine Type ........... 4-cycle L-head single-cylinder horizontal air-cooled gasoline engine
Number of Cylinders ........... 1
Displacement, cu.in (cc) ........... 13.53 (221.76)
Cylinder Bore, in (mm) ........... 2.63 (66.7)
Piston Stroke, in (mm) ........... 2.50 (63.5)
Rated Engine Power, hp (kW) ........... 6.0 (4.5)
Rated Engine Speed, rpm ........... 3600
Maximum Torque, Nm (ft-lbs) ........... 12.4 (9.2)
Torque Speed, rpm ........... 2600
Compression Ratio ........... 6.19:1
Lubrication System ........... Splash type
Air Cleaner ........... Paper element
Cooling System ........... Forced air
Ignition System ........... Magneto with dust and moisture seal
Starting System ........... Recoil or electric starter
Crankshaft ........... Iron alloy
Cylinder ........... Cast iron alloy
Electrical System Rating, Volts ........... 12
Fuel System
Fuel System Type ........... Carburetor
Carburetor Type ........... Float, adjustable jet
Governor Type ........... Mechanical
Fuel Tank Capacity, qts (L) ........... 4.0 (3.8)
Fuel Filter ........... Fine mesh molded into tank
Dimensions and Weight
Overall Length, in (mm) ........... 22.0 (557)
Overall Width, in (mm) ........... 11.1 (281)
Overall Height, in (mm) ........... 15.9 (403)
Net Weight, lbs (kg) ........... 60.0 (27.3)
Tecumseh HH60 Maintenance Data
Cylinder Block and Valves
Cylinder Bore Inside Diameter (Maximum), in (mm) ........... 2.6260 (66.700)
Cylinder Head (Max. Out of Flatness), in (mm) ........... 0.005 (0.127)
Intake Valve Clearance, in (mm) ........... 0.008-0.012 (0.20-0.31)
Exhaust Valve Clearance, in (mm) ........... 0.008-0.012 (0.20-0.31)
Engine Oil and Filter
Engine Oil Type (Summer) ........... SAE 30, 10W-30
Engine Oil Type (Winter) ........... SAE 5W-30
API Service Classifications ........... SF or SJ
Oil Capacity, qts (L) ........... 0.60 (0.57)
Air Filter Element Part Number ........... 35066/30727
Carburetor Adjustments
Main Pre-Set ........... 1-1/2 turn
Idle Pre-Set ........... 1 turn
Low Idle Speed, rpm ........... 1600-1800
High Idle Speed, rpm ........... 3600-3900
Ignition System
Spark Plug Type ........... Champion RJ8C
Spark Plug Gap, in (mm) ........... 0.030 (0.762)
Breaker Point Gap, in (mm) ........... 0.020 (0.508)
Timing Dim. BTDC, in (mm) ........... 0.080 (2.032)
Spark Plug Torque, Nm (ft-lbs) ........... 21 (28.5)
Service Intervals
Service Air Cleaner Element ........... Every 25 hrs
Change Engine Oil ........... Every 25 hrs
Clean Cooling Fins ........... Every 25 hrs
Check and Adjust Spark Plug ........... Every 100 hrs
Replace Air Cleaner Element ........... Every 100 hrs
Check Carburetor Adjustment ........... Every 100 hrs
Check and Adjust Valve Clearance ........... Every 200 hrs
Replace Spark Plug ........... Every 200 hrs
Tecumseh HH60 Service Data
Cylinder Bore (Standard), in (mm) ........... 2.6250 (66.675)
Cylinder Bore (Maximum), in (mm) ........... 2.6260 (66.700)
Cylinder Main Bearing, in (mm) ........... 1.0005-1.0010 (25.413-25.425)
Cylinder Cover/Flange Main Bearing Diameter, in (mm) ........... 1.0005-1.0010 (25.413-25.425)
Valve Clearance, in (mm) ........... 0.008-0.012 (0.203-0.305)
Valve Seat Width, in (mm) ........... 0.042-0.052 (1.067-1.321)
Valve Guide Oversize Dimensions, in (mm) ........... 0.3432-0.3442 (8.717-8.743)
Valve Seat Angle, deg ........... 46
Crankshaft End Play, in (mm) ........... 0.005-0.027 (0.127-0.686)
Crankpin Journal Diameter, in (mm) ........... 1.0615-1.0620 (26.962-26.975)
Crankshaft Magneto Main Bearing Diameter, in (mm) ........... 0.9985-0.9990 (25.362-25.375)
Crankshaft PTO Main Bearing Diameter, in (mm) ........... 0.9985-0.9990 (25.362-25.375)
Camshaft Bearing, in (mm) ........... 0.6230-0.6235 (15.824-15.837)
Connecting Rod Diameter (Crank Bearing), in (mm) ........... 1.0630-1.0635 (27.000-27.013)
Piston Diameter Bottom Of Skirt, in (mm) ........... 2.6210-2.6215 (66.573-66.586)
Ring Groove Side Clearance (1st and 2nd Compession Rings), in (mm) ........... 0.002-0.004 (0.051-0.102)
Ring Groove Side Clearance (Oil Ring), in (mm) ........... 0.002-0.004 (0.051-0.102)
Piston Skirt Clearance, in (mm) ........... 0.0035-0.0050 (0.089-0.127)
Ring End Gap, in (mm) ........... 0.010-0.020 (0.254-0.508)
Tecumseh HH60 Tightening Torque Specs
Cylinder Head Bolts, ft-lbs (Nm) ........... 16.5 (22.5)
Connecting Rod Bolts, ft-lbs (Nm) ........... 8.5 (11.5)
Cylinder Cover or Flange (Powerlok), ft-lbs (Nm) ........... 10.5 (14)
Flywheel Nut, ft-lbs (Nm) ........... 52.5 (71)
Flywheel Nut Ext. Ignition, ft-lbs (Nm) ........... 58 (79)
Spark Plug, ft-lbs (Nm) ........... 21 (28.5)
Ignition Mounting (Direct to Cylinder), ft-lbs (Nm) ........... 7.5 (10)
Intake Pipe to Cylinder, ft-lbs (Nm) ........... 8.5 (11.5)
Carburetor to Intake Pipe, ft-lbs (Nm) ........... 6 (8)
Recoil Starter (Top Mount), ft-lbs (Nm) ........... 4 (5.5)
Electric Starter To Cylinder, ft-lbs (Nm) ........... 13 (17.5)
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