Re: JOHNSON 115 NO START
The cost of a new powerpack will be a stunner (something like $350). However, it could be low voltage to the system, bad ignition coil, or bad sensor coil.<br /><br />Here's some alternatives, and ideas on testing. There were two systems in the 1969-72 V4s, both were capacitive discharge, one was points-triggered, the other used a sensor coil trigger. The '72 100, 69-70 115, and 71-72 125 should have a sensor trigger under the flywheel (the '71 100 and '69-'72 85hp have points). The sensor system has two wires to the sensor. Rapair (biggest maker of aftermarket ignition parts for outboards, and respected) says you can test the CD box by touching these two wires together. If you have 12 connected to the power lead (not one of the two sensor leads), you should get a spark at the fat secondary lead coming from the coil. The CD box should throw 150 volts (peak) at the coil, if you have a peak reading meter. I don't know how many volts the little sensor coil is supposed to generate.<br /><br />Used CD boxes on eBay typically run ~$75. I'd avoid the people who want to sell them 'as is'. Alternately, the points system will bolt on to your motor (the cranks all have a cam (points) and two holes (sensor)). You'll need the points timer base from a points-style motor, and the points style amp. The points amp from the 3cylinder motors will work fine also. Finally, you can use the points timer base & just hook it up straight battery-powered like they ran cars for 50 years. <br /><br />Those CD boxes want a steady (spike-free) 12V to live long - you want a large 12V battery and good, clean connections.
