1978 Ski-Doo Shop Manual, Page 324Get this manual
SECTION 05 SUB-SECTION 04, (ELECTRIC STARTER)
INSTALLATION
Make sure that starter and engine mating surfaces are free of grimeSerious trouble may arise if starter is not properly alignedInstall starterConnect the red battery cable and the red wire to the large terminal of the solenoidConnect green wire to small terminal of solenoidConnect black cable to battery
TROUBLE SHOOTING
Causes of troubles are not necessarily in the starting system (starter) but may be due to faulty battery, switches, electrical cables andor connectionsTrouble may also be attributed to malfunctioning of the ignition system andor fuel systemThe following trouble shooting table is limited to the starting system