1984 150 won't fire....tons of troubleshooting now, considering shooting the motor

jman72637

Cadet
Joined
Jul 13, 2007
Messages
16
I give!!!! and have to reach out to the pro's out there...



fired up first turn of the key after the long winter last year and ran flawlessly all night long. Returned the next day...... it would turn, turn and turn but would not fire. Let it sit, got busy the rest of the summer, winterized and got back on this about 2 weeks ago.
Replaced everything fuel related...lines, filters, rebuilt fuel pump, cleaned everything etc. still acting like it is staving for fuel. Got into the manual and figured that it had to be electrical because there is no way it can be fuel related. Tested stator, trigger and the kill wires...tested ok (ohm reader only) started pulling spark plugs to see if it was the switch/ignition packs. After troubleshooting everything on the CDI Electronics site (great troubleshooting on that site by the way) I'm still not getting a spark in cylinder #3, everything else is lighting up. #3 won't even spark after pulling the white/black connection wire between the 2 boards.... This last step is supposed to tell you the switch boxes are bad by everything firing regardless.


Ideas from here? could it be as simple as a plug wire? Would one bad wire stop the motor from firing? Any help or other troubleshooting ideas would be fantastic!


Thank you.
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,931
Take the wire that supplies #3 coil its power and move it to ones that is firing,if it fires replace both packs as bias circuit is bad. If it doesn't fire the coil/plug wire or wire has a problem
 

444

Senior Chief Petty Officer
Joined
Jul 16, 2010
Messages
704
Check your wires for continuity with a multimeter. If the wires test out good, swap around your ignition packs. If the problem moves, replace both packs. I'm assuming you've tried a new plug on #3 already.
 
Top