I-motori yesithuthi esinekile ukusebenza kahle emoyeni wezimali ezihlukene, uyinikeza inkabezeka yokuthi izithuthi ezingekile zizohle ngokuphelelwa kwamanzi okanye ukubulawa. Lezi motori zenkweyelwe ngematerial enginekile (isb., isolwandle), futhi usebenzisa amawiri nezinto ezinezimali ezihlanu kuya kuma-200–400°C, ngokulinganiselwe. Ziwahlukaniswa kusisitim kwalibangelo emanzini wesifiso, bethola ukuthi siphelwe ngokuzenzakalelayo lapho kuhloka ukubulawa okanye umoya ohlanu. Ukusebenza kwemotori kuyinhloko yekhombe libangelweni, noma kukhona izindlela zokugcina amandla okunye ukuqinisekisa ukusebenza noma lapho kungena amandla esimweni. Izi motori zethu zezithuthi ezingekile ziyakhiwa kahle ngokomthetho wendustry (isb., UL 10B, EN 16034) olungeneyipho elikhulu, noma kukhona iziqinisekiso lokusebenzisa kuzindawo zokuthenga nezokudlala. Zinezindlela zokusebenzela ngokusheshayo kusilayili sokulibangelwa. Ngokuchaza iziqinisekiso, izimali, okanye imigomo yokufaka, qhagamisa ithimi lethu lekhiphileyo.