Optimization of a Two-Stroke Gasoline Grass Cutter into a Rice Harvesting Machine

Muhammad Zam Zami Koto; Armila; Jana Hafiza

doi:10.24036/ijimce.v2i3.74

Authors

Muhammad Zam Zami Koto Departement Mechanical Engineering, Universitas Muhammadiyah Sumatera Barat, INDONESIA
Armila Departement Mechanical Engineering, Universitas Muhammadiyah Sumatera Barat, INDONESIA
Jana Hafiza Departement Mechanical Engineering, Universitas Muhammadiyah Sumatera Barat, INDONESIA

DOI:

https://doi.org/10.24036/ijimce.v2i3.74

Keywords:

Rice harvester, grass cutter modification, two-stroke engine, low-cost farming tool, small-scale agriculture

Abstract

In Indonesia, rice harvesting in rural areas is still largely done manually, resulting in low efficiency and high labor demands. This study aims to provide a practical solution by optimizing a two-stroke gasoline-powered grass cutter into a functional rice harvester. The research was conducted through stages including literature study, problem identification, design, fabrication, and performance testing. Mechanical analysis shows that the modified machine produces 47.7 N·mm³ torque and a cutting speed of 40.05 m/min, adequate for cutting rice stalks without stalling. Fuel tests revealed Pertamax offers better combustion efficiency than Pertalite. The balancing system improves operator comfort, while field trials showed a reduction in harvesting time by over 55% and labor costs by 50%. These results indicate that the optimized machine is effective, low-cost, and suitable for smallholder farmers.

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