1980 Johnson 2HP Service Manual, Page 28Get this manual
4-3 hasten the collapse, condenser in the primary circuit absorbs the current which wou1d otherwise across the opening breaker pointsThe rapid collapse induces current of sufficient voltage in the secondcircuit to across the spark p1ug air gapThe condenser, which acts like storage tank, consists of thin sheets of meta1 foil separated insu1ation, rolled to save space and enc10sed in meta1 casesheet of foil is grounded to the case, the other is nected through an insu1ated wire to the insu1ated stationary breaker pointSPARK PLUGS Spark p1ugs having the heat range very important for peak operation of the motor Spark p1ugs c1assified according to the temperatures at which they designed to operate, COLDSee Figure 4-2 the type of service to Se1ection of the correct spark p1ug depends suited to the which it is subjectedUn1ess the spark p1ug is motor, trouble arise which might interpreted as carburetor difficulty10w trolling speeds will tend to fou1 p1ugs due to the not burning from the However, at full throttle with hotter p1ug, the operating temperature too high, resulting in ignitionIN5ULATION FOIL FOIL