I needed a DVA meter to trouble shoot a "no spark" problem on my 9.9 HP 1997 Evinrude. I made several post on this problem in the past week as I was seeking some specifications to measure - got some pointers and went to my local library and checked out a Johnson/Evinrude Service Manural.
The home made DVA helped me conclude I need a new Power Pack - not a component that should fail on an engine with the low hours mine has - I"d estimate about 200 hours.
The tests I ran with my home made DVA adapter confirm the inputs to the Power Pack are there (Sensor voltage peak measured at 5 volts on rope pull: 1.2 to 9 volts is the spec.) (Charger voltage at 200 volts on rope pull: 150 to 275 expected).
Then the outputs, the primary current/voltage to the HV ignition coils read zero on both coils on repeated rope pulls.
The Coils also check out good on resistance measures.
The above measure call for a DVA meter (which is simply a high impedance DC meter measuring the rectified dive voltage across a capacitor). I have a high impedance VOM so all I needed to do was take a 2 mf capacitor and solder it in series to a diode and a 1,000 ohm current limiting resistor (I decided to add the 1K ohm resister just as a safety measure) Then I connected the above series circuit across the test points: e.g. sensor and charge coils and across the primaries of the ignition coils. The VOM is set on DC and connected across the capacitor. Worked great and all I used was the components, some solider and clip leads. This DVA adapter couldn't cost more than $5 to make, and I had the components on hand, so that cost was buried, free.
I have not yet ordered the Power Pack, but I am about 90% certain that is the problem - and a $90 investment is parts is a fraction of what it costs to take the engine into a shop, none of which are near my home anyway.