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Model: AH490 powerhead

MANUFACTURED BY:
TECUMSEH POWER PRODUCTS
GRAFTON WI. U.S.A.
SERIES OR ASSEMBLY NUMBER:
AH490 powerhead
YEAR INTRODUCED:
YEAR DISCONTINUED:
ENGINE DISPLACEMENT:
4.85 cu. in. (79.5 cc)
NUMBER OF CYLINDERS:
1
CYLINDER BORE:
2.09 in. (53 mm)
PISTON STROKE:
1.41 in. (35.8 mm)
PISTON RING THICKNESS:
CYLINDER TYPE:
Aluminum with chrome plated bore
INTAKE METHOD:
Reed valves
MANUFACTURER ADVERTISED H.P.:
WEIGHT:
OPERATOR CONFIGURATION:
HANDLEBAR SYSTEM:
CHAIN BRAKE:
CLUTCH:
DRIVE TYPE:
CONSTRUCTION:
Aluminum
MAGNETO TYPE:
Tecumseh flywheel type
CARBURETOR:
usually Tillotson diaphragm type, otherwise Tecumseh type
MAJOR REPAIR KIT:
MINOR REPAIR KIT:
AIR FILTER SYSTEM:
STARTER TYPE:
Tecumseh automatic rewind
OIL PUMP:
MAXIMUM ENGINE RPM:
IDLE RPM:
IGNITION TIMING:
0.140 in. BTDC
BREAKER POINT SETTING:
0.015 in.
FLYWHEEL/COIL AIR GAP:
position is fixed
SPARK PLUG TYPE:
Champion CJ8
SPARK PLUG GAP:
0.035 in.
CRANKSHAFT MAIN BEARINGS:
Ball
FUEL TANK CAPACITY:
FUEL OIL RATIO:
RECOMMENDED FUEL OCTANE:
MIX OIL SPECIFICATION:
CHAIN PITCH:
CHAIN TYPE:
BAR MOUNT PATTERN:
SHORTEST GUIDE BAR SUPPLIED:
LONGEST GUIDE BAR SUPPLIED:
COLOUR SCHEME:
Unit block series, supplied OEM to various chain saw manufacturers during 1960's
PAINT CODES:
ILLUSTRATED PARTS LIST:
SERVICE MANUAL:

COMMENTS:



 

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