Home › Forum › Ask A Member › mercury 7 1/2 hp › Re: mercury 7 1/2 hp
If CDI’s are designed right, they tend to run forever. They have been used in cars for many years now. Most outboard CDIs do not have mechanical Maker points and that’s a plus. In the early days of the three cylinder Johnsons and Evinrudes, I heard of a lot of those CDIs dying and even towed a few off the lake I’m on. One guy I towed had just had his 4th one die in two years. I have to believe OMC corrected whatever that problem was long ago.
In the 1970s, I used to repair aftermarket car CDIs – specifically the Delta Mark 10s – good circuit, but they had some quality problems with a couple of parts and had corrosion problems with moisture getting into the non-sealed box – Once I managed to discuss those issues with their circuit designer on the phone.
Dave