Small Engine Specs
Specifications for small engines used on a variety of outdoor power equipment
Honda engine G150 and G200 engine Maintenance Standards including idle speed, compression, float height, plug gap, valve clearances, ignition resistance
Model | | G150 | G200 |
Idle speed | | 1400 +/- 100 rpm | 1400 +/- 100 rpm |
Max no-load speed | | 3850-4000 rpm | 3850-4000 rpm |
Compression | | 588kPa (85psi) @ 600-700 rpm | 588kPa (85psi) @ 600-700 rpm |
Carb main jet | | #65 | #72 |
Float height | | 8.2mm (0.32in.) | 8.2mm (0.32in.) |
Spark plug gap | Breaker point ignition | 0.6-0.7mm (0.02-0.03in.) | 0.6-0.7mm (0.02-0.03in.) |
| CDI ignition | 0.9-1.0mm (0.035-0.039in.) | |
Exciter coil resistance | | 240ohm (CDI ignition) | 240ohm (CDI ignition) |
Ignition coil secondary winding resistance | | 6.6k-ohm (breaker point ignition) | 6.6k-ohm (breaker point ignition) |
Condenser capacitance | | 0.24 microfarad | 0.24 microfarad |
| Exhaust | 0.16-0.24mm (0.0063-0.0094in.) | 0.16-0.24mm (0.0063-0.0094in.) |
Carb pilot screw adjustment | | 1-3/8 turns | 3-1/4 turns |
Honda engine G150 and G200 Valve Clearances according to Serial Number Range
G150 up to 1100542 | IN: 0.04-0.12mm (0.002-0.005in) | EX: 0.04-0.12mm (0.002-0.005in) |
G200 up to 1168819 | IN: 0.04-0.12mm (0.002-0.005in) | EX: 0.04-0.12mm (0.002-0.005in) |
G150 from 1100543 to 1380694 | IN: 0.05-0.11mm (0.002-0.004in.) | EX:0.09-0.15mm (0.004-0.006in.) |
G200 from 1168820 to 1556007 | IN: 0.05-0.11mm (0.002-0.004in.) | EX:0.09-0.15mm (0.004-0.006in.) |
G150 above 1380695 | IN: 0.08-0.16mm (0.003-0.006in.) | EX: 0.16-0.24mm (0.006-0.009in.) |
G200 above 1556008 | IN: 0.08-0.16mm (0.003-0.006in.) | EX: 0.16-0.24mm (0.006-0.009in.) |