Small Engines (Lawn Mowers, etc.): 12v, starter solenoid, jumper wire


Question
QUESTION: Yes Eric there is 12v power from solenoid

rob

ANSWER: Just to make sure I am answering the right question, you have 12 volts DC on the small solenoid wire when you turn the key to the start postion.  Is this correct?

If you have 12 volts DC on the small solenoid wire when the key is in the start postion then the solenoid should work connecting the large two battery cables which should spin the starter.

Is the solenoid grounded to the metal engine housing?  Does not matter where the solenoid is grouned to, it just has to be bolted to a metal chasis part.

When testing the start make sure to remove the spark plug.

How old is the solenoid?

Eric

---------- FOLLOW-UP ----------

QUESTION: yes there is 12v

yes solenoid is grounded

solenoid is about 4 months old

on the solenoid picture i sent you the green wire was unattached to anything. i found this wire near the starter when i changed the starter. should this wire also be attached to the starter along with the other larger wire?

rob

ANSWER: Is there any power on the green wire when the key is in the off, run or start position?

Does the machine have an amp meter, hour meter or any other accesory that the green wire may have been connect to.

You must have a multimeter so you can test the solenoid.  Disconnect the larger battey cable from the starer side of the solenoid.  Next use a jumper wire from the positive battery cable to the small terminal on the solenoid and see if it clicks.  If it does, use your meter to see if 12 volts is passing through the solenoid by measuring the starter side post of the solenoid.

Let me know what you find.

Eric

---------- FOLLOW-UP ----------

QUESTION: when key is turned to own position it registered 12v

has both meters

green wire is the wire that is not connected to anything lying by the starter. it goes from the solenoid to the starter.

solenoid is registering 12v on all 3 wires

i also checked all the wires from the ignition switch and all look good ..no fraying or exposed wires

1 more thing...if i bypass the solenoid the engine cranks...my neighbor did this i was not home at the time.

i am not concerened about all the other meters, amp meter, hour meter.
i just want it to run. its only use is for transporting items and yard cleanup...there are no blades attached.

rob
Eric thanks for being patient and helping

Answer
So the solenoid has 12 volts on all three solenoid wire, the two battery cable wires and the small solenoid when the key is in the start position.  Is this correct?  If so then the starter should turn if there is 12 volts on the solenoid wire running to the starter.

Take a look at this link:

http://www.google.com/imgres?imgurl=http://www.small-engines.com/pics/wirediag.g

This next link contains good information on small engine wiring and testing:

http://www4.briggsandstratton.com/miscpdfs/RNT/alternator_replacement.pdf


When your neighbor shorted the solenoid and the starter turned this tells you the starter battery cables are working.  

The problem has to be either the small exciter wire not receiving 12 volts DC when the key is in the start position or a bad starter solenoid.

Did you use a jumper wire connected to the positive battery terminal and connecting the other end of the jumper wire to the small exciter post on the starter solenoid?

With the key off and in the run position, is there 12 volts DC on the small solenoid post/wire?

Let me know.
Eric