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  Electric Starter Motor Not Operating

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Author Topic:   Electric Starter Motor Not Operating
fox3060 posted 02-05-2010 07:06 AM ET (US)   Profile for fox3060   Send Email to fox3060  
When I turn the key [on a 1994 Boston Whaler RAGE] the starter does nothing. I jumped it from the battery with cables and it seems to work, just not with the ignition. any ideas? Thanks. I just finished replacing the thermos, head gaskets, and water jacket gaskets. Fox
Martino posted 02-05-2010 07:54 PM ET (US)     Profile for Martino  Send Email to Martino     
From your description, I will assume you have the OMC engine. Take a look at the starter solenoid. Two small terminals at top. One goes to a wire to ground. The other goes to your key switch. Hit the switch wire with 12 volts. Starter should engage. If it doesn't, and jumping the starter directly makes it turn, then you have a bad solenoid. If it does turn, then you have a problem with the ignition switch, wires, or connectors in between.
Jerry Townsend posted 02-05-2010 08:08 PM ET (US)     Profile for Jerry Townsend  Send Email to Jerry Townsend     
Many solenoids have only one small contact - for the positive power source - with the negative taken via the metal housing mounted on the engine - or other grounded location. --- Jerry/Idaho
fox3060 posted 02-05-2010 10:30 PM ET (US)     Profile for fox3060  Send Email to fox3060     
Thanks for the input guys. I'll let yu know what I find.
Martino posted 02-06-2010 03:34 PM ET (US)     Profile for Martino  Send Email to Martino     
I think nearly all automotive solenoids that aren't built onto the starter have one terminal. All OMC ones that I have ever seen have two. I'm sure its because they can charge you more this way!
Martino posted 02-06-2010 03:37 PM ET (US)     Profile for Martino  Send Email to Martino     
One other thought, my Rage has the Yamaha drive system, which does not have a lock-out to prevent starting "in gear." If the OMC has a lock-out, you could have a problem with the lock-out switch or wiring too.
jimh posted 02-06-2010 10:18 PM ET (US)     Profile for jimh  Send Email to jimh     
I recommend you read and follow the advice given in

Electric Starting Circuits
http://continuouswave.com/whaler/reference/electricStart.html

for diagnosing problems with electric motor starting circuits. The article gives detailed information on all the points in the circuit where a discontinuity in current flow could cause the starter motor to not operate.

jimh posted 02-06-2010 10:20 PM ET (US)     Profile for jimh  Send Email to jimh     
[Moved to SMALL BOAT ELECTRICAL.]

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