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Author Topic:   1977, 351 V-8 OMC
Diver1 posted 06-07-2009 01:15 PM ET (US)   Profile for Diver1   Send Email to Diver1  
Off of the alt.there is a resistor, what is it for, and where can I get one? This is an inline resistor, and is the origional wiring of this boat.This one got hot and burned up.
seahorse posted 06-07-2009 01:59 PM ET (US)     Profile for seahorse  Send Email to seahorse     

go to and click on PARTS, then choose STERN DRIVE, and then the year and model number.

The only problem with engines that old are the jury-rigging and parts change-outs that are sometimes done over the years. Most are not in stock configuration anymore.

jimh posted 06-07-2009 02:05 PM ET (US)     Profile for jimh  Send Email to jimh     
In some ignition circuits there is a ballast resistor. The resistor is shorted out during engine cranking so that the spark voltage can be as high as possible. During normal running the resistor is in the circuit which feeds the primary voltage to the spark circuit, typically a distributor arrangement with a common spark coil.
jimh posted 06-07-2009 06:32 PM ET (US)     Profile for jimh  Send Email to jimh     
DIVER1--Please note. The separate threads you began have both been removed. Do not create a new thread to reply to this discussion. Post follow up articles in this thread.

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