Logo

1985 Mercury 115 Electrical problems

mikeinde

New member
"Motor starting running rough.

"Motor starting running rough. Troubleshooting revealed no spark on cyls 1,2&3. Had spark on cyls 4,5&6. Swapped lower switch box (on rt side of motor) to upper position. Now had spark on cyls. 1,2&3 but not on 4,5&6. Got another switch box and replaced the lower one. Checked spark on all cyls. Found no spark on cyl. #5 Checked coil wires-good. Checked cyls 1,2&3. Found no spark on #3. Then rechecked cyls 4,5&6. Now no spark on any of those. Seems that every time I turned the engine over I'm frying another portion of these switch boxes. Down to spark on #1 cyl only. IDEAS?!!"
 
because these boxes will cause

because these boxes will cause the other to go out
it is well know for that
somebody else here will tell u

yes check all wire connections for loose or grounding out wires
 
Back
Top