Home › Forum › Ask A Member › 15 Evinrude 1975 no Spark Driver coil ? › Re: 15 Evinrude 1975 no Spark Driver coil ?
OK, I am reading from the 1976 9.9hp manual. It states that the rope start driver coil should measure 1.45+/-.4 ohms as mumbles stated.
The electric start driver coil should measure 2.70+/-.7 ohms. Is your engine electric start? If so, your resistance reading seems to be in range. It looks as though the flywheel magnets are slightly different in the two models which may account for the different resistance readings. Does your engine have an electric start flywheel (one with ring gear)? If not, I suppose it is possible someone inadvertently installed an electric start driver coil with your manual start flywheel, might make a difference. In any event, both style driver coils are available and cost about $52.
Like Frank says, the air gap tool is nice to have, but the air gap can be set fairly accurately using the method he described. If you have the driver coil pushed too far inward, this might explain the no spark due to driver coil air gap that is too far from the magnets.