Engine

General

Model G4AJ
Type 4 cylinder, inline, SOHC
Bore X Stroke - in.(mm) 2.97 X 3.23 (75.5 x 82)
Displacement - cu.in. (cc) 89.6 (1468)
Compression Ratio 9.4
Firing Order 1-3-4-2
Horsepower (SAE net) (HP @ rpm) 68 @ 5500
Torque (SAE net) (ft.lbs. @ rpm) 82 @ 3500

Ignition

Type Electronic, breakerless
Advance Mechanism Centrifugal with vacuum
Coil 12V with external resistor
Spark Plug Wide gap type (Champion RN9YC4)
(NGK BUR6EA-11)
Spark Plug Gap - in.(mm) 0.039-0.043 (1.0-1.1)
ENGINE Cont.

Valve System

Type Belt driven single overhead camshaft,

two valves per cylinder with jet valve.

Valve Timing

Intake opens (BTDC) 15~
Intake closes (ABDC) 53~
Exhaust opens (BBDC) 53~
Exhaust closes (ATCL) 15~
Jet valve opens (BTDC) 15~
Jet valve closes (ABDC) 53~
Intake valve duration 248~
Exhaust valve duration 248~
Jet valve duration 248~
Valve overlap 30~
Valve lift - in.(mm) 0.346 (8.8)

Valve Clearance (hot)-in. (mm)

Intake 0.006 (0.15)
Exhaust 0.010 (0.25)
Jet valve 0.010 (0.25)

Lubrication System

Type Mechanical
Oil pump Gear Type
Oil pressure-psi(kPA) 11.3 (78) @ 750 rpm
Oil filter Full flow cartridge type
Oil capacity w/filter-qt.(L) 3.6 (3.4)

Cooling System

Type Water cooled
Radiator Vertical fin and tube
Water pump Centrifugal, V-belt drive
Fan type Electric
Thermostat ~F (~C) 190 (88)
Radiator cap - psi (kPA) 1C.7-14.9 (74-103)
Coolant capacity - qt. (L) 5.3 (5.0)
ENGINE Cont.

Fuel System

Carburetor type Downdraft, 2-barrel, feed-back type,
electric choke
Fuel pump type Mechanical diaphragm
Fuel pump pressure-psi (kPA) 2.76-3.63 (19-25)
Fuel filter type Inline paper element
Fuel tank capacity-gal. (L) 10.6 (40.0) - M/T
13.2 (50.0) - A/T

Electrical System

Battery 12V, MF60AH-B rating, maintenance free,
420 cold crank amps (@ 0~F), 92 min.
reserve capacity rating
Alternator 12V, 55A with integral IC regulator
Starter 12V/0.7kW - M/T
12V/0.9kW - A/T - P/S