Sparkless b87 Evinrude 35hp

"Used up the last spark on my

"Used up the last spark on my 35 and have been troubleshooting the system. I have most of the diagnostic equipment except an M-80 tester so have substituted my fluke and a DVA adapter. The bottom line is I'm only getting 3.7 volts from the powerpack output on either wire. I think I did the previous tests correctly although I have a question on the trigger input. I'm assuming that's the same as the sensor coil and I got 7.6 volts on that test. Any help would be appreciated. I'm guessing I need a new power pack, but don't want to buy one unnecessarily or ruin one accidentally... Thanks"

"before a power pack i would t

"before a power pack i would try to rule out all
other possible causes of spark failure,and recheck my tests.here are a few to reconsider:
the main engine grounds /coil grounds,condition of wires/connectors trigger wiring,stator,kill switch/its wiring,kill sw grounded,sheared keyway,broken/weak magnet(s).,cdi wiring/corrosion at connectors/or in wiring itself,shifter adjustment/safety neutral sw,
loose positive wire to ignition,corroded heads,and im sure i forgot a few.not bad idea to buy a service manual ."

The most important thing to do

The most important thing to do first is disconect the stop wire and test for spark

"Thanks for the replies guys,

"Thanks for the replies guys, Sorry for the slow response, but I'll definitely try your suggestions. I was hoping to work on them this weekend, but the motor went to the back burner..."

"Had a chance to work on this

"Had a chance to work on this for an hour this evening. I have the 5 pin connector between power pack and the flywheel. My manual starts with the kill switch test by jumpering across A,B,C,D and leaving pin E unjumpered. So it seems to me that that test eliminates the kill switch. I rechecked for the 3rd or 4th time all the other tests, coil & sensor resistance and grouds, etc. When it gets to the coil output and trigger coil tests, my book says to use an m-80 or S-80 tester. It seems to have a load switch of some kind. Anyway, I get a great test with my neon tester although I'm not using any load... When I do the trigger test (no load of course)I don't get a spark either. So I don't know how important the S-80/M-80 tester with the load button really is? Anybody know? Thanks for all your comments."