No spark 1979 40hp 402

[bcbart82]

Hello,

Im looking for some help diagnosing a spark problem on this engine. Im not getting spark. I replaced the stator last year simply because the wiring was completely rotten. After that i didnt use the boat much but it ran. Then one day it just died. I checked the orange kill wire as recommended to see if it was an ignition problem and still nothing. I then removed the two yellow wires from the rectifier and instantly i had spark. I replaced the rectifier and with it hooked up still no spark? Any assistance would be appreciated. (2 years ago i replaced the engine wiring harness due to rotten wires)

thanks

Bart

[JOE54]

got a serv manual so you can do some testing on ign system ???? ohm test stator trigger

[bcbart82]

The stator is brand new i just replaced it last year. I have a multi meter but not the dva adapter ive read about.

thanks

[bcbart82]

Any help on this? The boat will start right up with the rectifier unhooked. With the dva i dont get good voltage with the rectifier hooked up. Unhooked i get higher but not in spec then unhook the switchbox and i get voltage in spec. Can the switchbox cause this?

[JOE54]

yes would replace both rectifier and box