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| Home / Small Engines / Honda Engines / Honda GC160 |
Honda GC160 Maintenance
| Engine Model: Honda GC160 |
| Engine Type: 4-cycle 1-cylinder air-cooled gasoline engine |
| Total Displacement: 9.8 cu.in (160 cc) |
| Rated Engine Power: 5 Hp (3.7 kW) at 3600 rpm |
| Carburetor Type: Horizontal, butterfly valve |
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| Service Data |
Cylinder Bore Inside Diameter (Maximum), in (mm) .............. 2.562 (64.165)
Cylinder Head (Max Out of Flatness), in (mm) .............. 0.002 (0.05)
Intake Valve Clearance, in (mm) .............. 0.006 (0.015)
Exhaust Valve Clearance, in (mm) .............. 0.008 (0.020)
| Engine Oil and Filter |
Engine Oil Type (Summer) .............. SAE 10W-30
Engine Oil Type (Winter) .............. SAE 5W-30
API Service Classifications .............. SJ or higher
Oil Capacity, qts (L) .............. 0.61 (0.58)
Air Filter Element Part Number .............. 17211-ZL8-023
| Carburetor Adjustment |
Main Fuel .............. Not adjustable (Factory setting)
Idle Fuel .............. 1-3/4 turns out
Low Idle Speed, rpm .............. 1400±150
High Idle Speed, rpm .............. 3850±150
| Ignition System |
Spark Plug Type .............. NGK BPR6ES
Spark Plug Gap, in (mm) .............. 0.028-0.032 (0.70-0.80)
Module Air Gap, in (mm) .............. 0.008-0.024 (0.20-0.60)
Ignition Timing, deg .............. 20 BTDC
Spark Plug Torque, Nm (ft-lbs) .............. 20 (14)
| Service Intervals |
Check Engine Oil Level .............. Every 10 hours
Clean Air Filter Element .............. Every 25 hours
Change Engine Oil .............. Every 50 hours
Check and Adjust Spark Plug .............. Every 100 hours
Check Carburetor Adjustment .............. Every 100 hours
Check and Adjust Idle Speed .............. Every 100 hours
Clean Fuel Strainer .............. Every 100 hours
Check and Adjust Valve Clearance .............. Every 100 hours
Replace Spark Plug .............. Every 250 hours
Replace Air Filter Element .............. Every 250 hours
Clean Combustion Chamber .............. Every 250 hours
Clean Fuel Lines .............. Every 250 hours
| Tightening Torques |
Crankcase Cover (M6x1.0) .............. 12 Nm (9 ft-lb)
Connecting Rod Bolt (M7x1.0) .............. 12 Nm (9 ft-lb)
Valve Adjusting Lock Nut (M5x0.5) .............. 8 Nm (5.8 ft-lb)
Cylinder Head Cover Bolt (M6x1.0) .............. 12 Nm (9 ft-lb)
Oil Drain Plug Bolt (M12x1.5) .............. 24 Nm (17 ft-lb)
Flywheel Nut (M14x1.5) .............. 52 Nm (38 ft-lb)
Governor Arm Nut (M6x1.0) .............. 10 Nm (7 ft-lb)
Breather Cover Bolt (M6x1.0) .............. 12 Nm (9 ft-lb)
Air Cleaner Case Bolt (M6x1.0) .............. 10 Nm (7 ft-lb)
Muffler Bolt (M6x1.0) .............. 12 Nm (9 ft-lb)
Recoil Starter Nut (M6x1.0) .............. 8.5 Nm (6.1 ft-lb)
Fan Cover Stud Bolt (M6x1.0) .............. 12 Nm (9 ft-lb)
Fuel Pump Screw (M5x0.8) .............. 3 Nm (2.2 ft-lb)
Oil Level Switch Bolt (M6x1.0) .............. 12 Nm (9 ft-lb)
Oil Filler Extension Bolt (M6x1.0) .............. 12 Nm (9 ft-lb)
Spark Plug (M14x1.25) .............. 20 Nm (14 ft-lb)
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