1970 Johnson 115 HP Outboard Motor Service manual, Page 38Get this manual
11 CHECKING COILUnmount coil and unscrew lead from distributor capRemount coilConnect needle type spark checking device to the coil to distributor high tension leadCrank the engine electricallySpark should jump 38" gapSee Figure 4-12If this does not occurthe coil can be checked with conventional ignition analyzerSee "Specifications" page 2- 212CHECKING SENSOR With needle type spark checking device connected as shown in Figure 4-12, and key witch in "ON" position, with jumper connected between and 9, separate the sensor to pulse pack connector (see Figure 4-2)Each time the connection is opened, spa rk should jump 3 8" gapIf spark jumps nowand did not in step 11sensor requires adjustment or replacementSee "Reassembly and Adjus tment of Distributor ," page 4-10
COIL HIGH TENSION