Re: 9.9 evenrude no spark
Those are strange readings. It does sound like your PP is shot, but verify that before replacing, as it is a non refundable part. Do you have a manual? If it is shot, follow Joe's advice below to troubleshoot.
(MCD Powerpack Failures - 1973 +)
(Magneto Capacitance Discharge Systems)
(J. Reeves)
The usual cause of having those type powerpacks fail repeatedly is having a very small of voltage applied to the Black/Yellow wire at the pack. Test as follows.
Disconnect the Black/Yellow wire at the powerpack.
Insert either an ampere meter or a volt meter set to its lowest DC voltage reading between that Black Yellow wire and ground.
With the ignition key in the OFF position, observe the meter reading. Now turn the ignition key to the ON position and again observe the meter reading.
Any reading, movement of the meter needle, would indicate that battery voltage is being applied to that Black/Yellow wire. If a reading is present, remove the other end of that Black/Yellow from the raised terminal of the ignition switch.
If the reading ceases to exist when the Black/Yellow wire is removed from the ignition switch, replace the switch. If the reading continues to exist, there would be a short of some kind in either the engine or instrument wiring harness.... to determine which, simply unplug the large RED electrical plug at the engine which would eliminate the instrument cable.
