Re: johnson115hp
You're actually fortunate that it's the sensor that's gone - the powerpack is more expensive to replace. Keep an eye on eBay, the sensors for these motors are typically $15 +/-. <br /><br />The 1969 thru 1972 OMC V4s came with two styles of ignitions; sensor-trigger & points. The higher-dollar motors came with the sensors (1972 & 1 125, 1969 & 70 115), the less expensive (85 hp) came with points, not sure which 100hp had which triggering mechanism. The sensor & points style system used different powerpacks.<br /><br />So, be aware than you can swap over one to the other - all of the cranks has two holes (for sensor) and a cam (for the points). I should mention that I have been told this by a good source, but haven't verified it myself yet. If you've already got to pull the flywheel to replace the sensor, not much more work to swap the entire system. Just telling you this so that you have more options in terms of what to buy, if you can scare up some used parts. I like the points style better because it's one less thing to break that I can't fix (anybody can fix points). If you do the swap, you need both the points-style timerbase, and the corresponding power pack.