Johnson 88 Hp V4 not my speciality

Bt Doctur

Supreme Mariner
Joined
Aug 29, 2004
Messages
19,384
88 hp johnson J88MSLCCC came in for a check up and was thrown on me . Carbs removed and sent for cleaning , fuel pump rebuild kit installed, compression 120 across all 4 , running on a remote will start up and run for about 2 minutes then dog down .When cold spark tester has all 4, when runabout 2 minutes it drops 2 sparks. Have got some readings to test for the trigger and timing and charge coil but is there a specific test using an ohm meter for the module itself? By the way the ground wire insulation for the module looks "melted, burned away"
 

jakedaawg

Rear Admiral
Joined
Jun 26, 2012
Messages
4,275
No ohms test for cdi. There is an output test with peak reading voltmeter. If it drops 2 cylinders once warm I would suspect power pack.

cdielectronics.com has a free trouble shooting guide.
 
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