| Model Series | Spark Plug Gap |
| GX640 | 1.0-1.1mm ( 0.039-0.043in. ) |
| GX100 | 0.6-0.7mm ( 0.024-0.028in ) |
| GX120 | 0.7-0.8mm ( 0.028-0.031in ) |
| GX160 | 0.7-0.8mm ( 0.028-0.031in ) |
| GX200 | 0.7-0.8mm ( 0.028-0.031in ) |
| GX240K1 | 0.7-0.8mm ( 0.028-0.031in ) |
| GX270 | 0.7-0.8mm ( 0.028-0.031in ) |
| GX340K1 | 0.7-0.8mm ( 0.028-0.031in ) |
| GX390K1 | 0.7-0.8mm ( 0.028-0.031in ) |
| GX22 | 0.6-0.7mm ( 0.024-0.028in ) |
| GX31 | 0.6-0.7mm ( 0.024-0.028in ) |
| GX610 | 0.7-0.8mm ( 0.028-0.031in ) |
| GX620 | 0.7-0.8mm ( 0.028-0.031in ) |
| GX670 | 0.7-0.8mm ( 0.028-0.031in ) |
| GXV120 | 0.7-0.8mm ( 0.028-0.031in ) |
| GXV140 | 0.7-0.8 |
| GXV160 | 0.7-0.8mm ( 0.028-0.031in ) |
| GXV270 | 0.7-0.8mm ( 0.028-0.031in ) |
| GXV340 | 0.7-0.8mm ( 0.028-0.031in ) |
| GXV610K1 | 0.7-0.8mm ( 0.028-0.031in ) |
| GXV620K1 | 0.7-0.8mm ( 0.028-0.031in ) |
| GX25 | 0.6-0.7mm ( 0.024-0.028in ) |
| GX35 | 0.6-0.7mm ( 0.024-0.028in ) |
| GXH50 | 0.6-0.7mm ( 0.024-0.028in ) |
| GXV50 | 0.6-0.7mm ( 0.024-0.028in ) |
| GS190 | 0.7-0.8mm ( 0.028-0.031in ) |
| GSV190 | 0.7-0.8mm ( 0.028-0.031in ) |
| GC135 | 0.7-0.8mm ( 0.028-0.031in ) |
| GC160 | 0.7-0.8mm ( 0.028-0.031in ) |
| GC190 | 0.7-0.8mm ( 0.028-0.031in ) |
| GCV135 | 0.7-0.8mm ( 0.028-0.031in ) |
| GCV160 | 0.7-0.8mm ( 0.028-0.031in ) |
| GCV520 | 0.7-0.8mm ( 0.028-0.031in ) |
| GCV530 | 0.7-0.8mm ( 0.028-0.031in ) |
| GD320 | Diesel |
| GD410 | Diesel |
| GD1100 | Diesel |
| GD1250 | Diesel |
| G150K1 2.6kW | 0.6-0.7mm ( 0.02-0.03in ) |
| G150K1 2.8kW | 0.6-0.7mm ( 0.02-0.03in ) |
| G200K1 3.7kW | 0.6-0.7mm ( 0.02-0.03in ) |
| G200K1 4.0kW | 0.6-0.7mm ( 0.02-0.03in ) |
| GV100 | 0.6-0.7mm ( 0.024-0.028in ) |
| GX360 | 0.6-0.7mm ( 0.024-0.028in ) |