1978 Polaris RXL Service Manual, Page 24Get this manual
lWO-CYCLE OPERATION
You Polari snowmobi le is equipped with depend able, high -perfo rmance two-cycle engi neTr eat it right give it reasona ble ca reThe first step is to have basic compre hension of the mechanics invo lved in its op erat ion Und erstanding you two-cycle engine and how it fun ct ions will enable yo to be tter mai ntain you engineresult ing in longe and better perform ance and life less cost you basic componen the two -cy cle engine is the pistonWhen th piston mov es upward in th cylinder (1st stroke), it dr aws fu el into th crankcase while also co mp ressing fuel in the combust ion chamberThe spark plug th en ignites th fuel, wh ich expands and forces th e