Iphampu kawoyela yeloli iphukile futhi inalezi zimpawu.
1. Ukusheshisa okubuthakathaka nomuzwa wokukhungatheka lapho ufaka uphethiloli.
2. Akulula ukuqala uma uqala, futhi kuthatha isikhathi eside ukucindezela okhiye.
3. Kunomsindo obhuzayo ngenkathi ushayela.
4. Isibani samaphutha enjini sivuliwe.Injini iyanyakaza.

Izimbangela zeiphampu yamafuthaumonakalo:
1. Uma izinga likawoyela liphansi, ithangi likaphethiloli lizogcwala ukungcola okuhlukahlukene noma izinto zangaphandle.Nakuba iphampu kawoyela inesihlungi sokuhlunga uphethiloli, ingavimba kuphela izinhlayiya ezinkulu zokungcola.Izinhlayiya ezincane zokungcola zizomuncwa enjini yepompo kawoyela, okuzodala umonakalo empompini kawoyela ngokuhamba kwesikhathi.
2. Isihlungi sikaphethiloli asizange sithathelwe indawo isikhathi eside, futhi uhlelo lokuphakela uphethiloli lwesihlungi sikaphethiloli luvinjwe kakhulu, okubangela ubunzima bokupompa uwoyela.Izimo zomthwalo wesikhathi eside zidala ukulimala kwepompo likaphethiloli.
Ngokwezindlela ezahlukene zokushayela, amaphampu kaphethiloli angahlukaniswa abe uhlobo lwe-diaphragm lwemishini kanye nohlobo lokushayela kagesi.
1. Iphampu kaphethiloli yohlobo lwe-diaphragm iwuhlobo olumele uhlobo lwenjini ye-carburetor.Umgomo wayo wokusebenza ushayelwa isondo le-eccentric ku-camshaft.Umgomo wayo wokusebenza ukuthi ngesikhathi sokujikeleza kwe-camshaft yokumunca uwoyela, lapho ingalo yokushwibeka phezulu kwe-eccentric idonsela phansi induku ye-pump diaphragm, i-pump diaphragm yehla, ikhiqiza ukumunca, futhi uphethiloli ukhishwa ethangini likaphethiloli, bese idlula epayipini likaphethiloli, isihlungi sikaphethiloli, Induku yepompo ye-diaphragm kanye nedivaysi yokumpompa uwoyela ikhiqiza ukumunca.
2. Iphampu kaphethiloli kagesi ayishayelwa i-camshaft, kodwa incike kumandla kazibuthe kagesi ukumunca ngokuphindaphindiwe ulwelwesi lwepompo.

Iphampu kufanele ishintshwe kangaki:
Awukho umjikelezo omisiwe wokushintsha amaphampu kaphethiloli.Ngokuvamile, ngemva kokuba imoto isihambe amakhilomitha angu-100,000, iphampu kaphethiloli ingase ibe yinto engavamile.Kodwa-ke, isihlungi sikaphethiloli singashintshwa cishe ngamakhilomitha angama-40,000.Lapho uhlola futhi ugcina iphampu yamafutha emoto, udinga ukuya esitolo sokulungisa uchwepheshe ukuze ugweme izinkinga ngesikhathi senqubo yokuhlakaza, okungabangela ukwehluleka okukhulu nokulahlekelwa okungadingekile.