| Engine options | |
| 20HP Kohler 624cc 2-cyl gasoline | |
| 21HP Kohler 624cc 2-cyl gasoline | |
| 22HP Kohler 671cc 2-cyl gasoline |
| Engine Detail | |
| Kohler CH20S | |
| gasoline | |
| 2-cylinder | |
| air-cooled horizontal-shaft V-twin | |
| The Kohler CH20 was used in the GT 2544 in 2005. | |
| Displacement | 624 cc 38.1 ci |
| Bore/Stroke | 3.03x2.64 inches 77 x 67 mm |
| Power (gross) | 20 hp 14.9 kW |
| Rated RPM | 3350 |
| Idle RPM | 1400-3600 |
| Torque | 32.7 lb-ft 44.3 Nm |
| Torque RPM | 2400 |
| Starter | electric |
| Starter volts | 12 |
| Sparkplug gap | 0.030 inches 0.762 mm |
| Engine Oil | |
| |
| Oil capacity | 2 qts 1.9 L |
| Oil change | 100 h |
| Engine Detail | |
| Kohler CH21S | |
| gasoline | |
| 2-cylinder | |
| air-cooled horizontal-shaft V-twin | |
| The Kohler CH21 was used in the GT 2544 from 2006 through 2008. | |
| Displacement | 624 cc 38.1 ci |
| Bore/Stroke | 3.03x2.64 inches 77 x 67 mm |
| Power (gross) | 21 hp 15.7 kW |
| Rated RPM | 3350 |
| Idle RPM | 1400-3600 |
| Torque | 36.2 lb-ft 49.1 Nm |
| Torque RPM | 2400 |
| Sparkplug gap | 0.030 inches 0.762 mm |
| Engine Oil | |
| |
| Oil capacity | 2 qts 1.9 L |
| Oil change | 100 h |
| Engine Detail | |
| Kohler CH670S | |
| gasoline | |
| 2-cylinder | |
| air-cooled horizontal-shaft V-twin | |
| The Kohler CH670 was used in the GT 2544 from 2008 through 2010. | |
| Displacement | 671 cc 41 ci |
| Bore/Stroke | 3.15x2.64 inches 80 x 67 mm |
| Power (gross) | 22 hp 16.4 kW |
| Rated RPM | 3350 |
| Idle RPM | 1400-3600 |
| Torque | 36.2 lb-ft 49.1 Nm |
| Torque RPM | 2400 |
| Oil capacity | 2 qts 1.9 L |
| Sparkplug gap | 0.030 inches 0.762 mm |
| Page information | |
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| TractorData is a family-owned small business located in Minnesota that has been providing reference information on tractors since 1999. | |
| Peter Easterlund - owner/author | |
| Email: Peter@TractorData.com | |
| Updated on May 12, 2025 |