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Coil

dcso

Contributing Member
how do yo test a 12v coil ? fo

how do yo test a 12v coil ? for some reason I dont seem to begetting any spark. with a test light I get power between the leads but nothing from the probe on top. the engine is out of the boat. it has merc electronic ignotion ( 5.7 260) with the harness disconnected at the plug.
thanks
ted
 
"Use an ohmmeter to test it.

"Use an ohmmeter to test it. Disconnect the wires. Set the DVM on the lowest scale to measure the resistance of the primary side of the coil; the two small wire connectors should measure less than 1 ohm. To test the secondary set the DVM on the 20K scale; measure from the coil out put to engine ground; 9,400 11,700 ohms."
 
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