Question about 1949 flathead V6
Fleet Owner
Joined: Jul 2004
Posts: 27,294
Likes: 1,055
From: NM
Those cables are inadequate for 6v. Look here for a comparison between 12v and 6v cables:
https://www.ford-trucks.com/forums/1...l#post12730432
What amp capacity is that knife switch rated for? The 6v starter easily draws 400+ amps.
https://www.ford-trucks.com/forums/1...l#post12730432
What amp capacity is that knife switch rated for? The 6v starter easily draws 400+ amps.
Thread Starter
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New User
Joined: Jun 2016
Posts: 16
Likes: 2
Those cables are inadequate for 6v. Look here for a comparison between 12v and 6v cables:
https://www.ford-trucks.com/forums/1...l#post12730432
What amp capacity is that knife switch rated for? The 6v starter easily draws 400+ amps.
https://www.ford-trucks.com/forums/1...l#post12730432
What amp capacity is that knife switch rated for? The 6v starter easily draws 400+ amps.
Justin
Believe Nothing
Joined: Jun 2004
Posts: 7,514
Likes: 398
From: W. Central FL.
Impossible for me to tell what gauge wire you have between the solenoid and the starter, insulation being of different thickness. It may or may not be OK.
Suggest you remove the ground strap and spread the connector that goes over the positive post of the battery so the cable has full contact with the post. Remove the other end and clean the area where the cable contacts the head and the bolt. Remove the other end of the cable at the starter and clean it as well.
If the above does not correct the problem, use a heavy metal tool and jump across the two large posts on the starter relay/solenoid. This will by pass the relay/solenoid you have doubts with.
Edit: That ground strap looks to be a lot longer than necessary. You will loose some power there.
Suggest you remove the ground strap and spread the connector that goes over the positive post of the battery so the cable has full contact with the post. Remove the other end and clean the area where the cable contacts the head and the bolt. Remove the other end of the cable at the starter and clean it as well.
If the above does not correct the problem, use a heavy metal tool and jump across the two large posts on the starter relay/solenoid. This will by pass the relay/solenoid you have doubts with.
Edit: That ground strap looks to be a lot longer than necessary. You will loose some power there.
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Laughing Gas
Joined: Mar 2004
Posts: 989
Likes: 113
From: australia
isn't this a recent purchase ?
Are you sure this isn't an engine fault that is causing the engine to turn slow ?
Does it turn over reasonably free with a socket and ratchet on the crank pulley ?
Is there oil in the motor ?
Are you sure this isn't an engine fault that is causing the engine to turn slow ?
Does it turn over reasonably free with a socket and ratchet on the crank pulley ?
Is there oil in the motor ?
Fleet Owner
Joined: Jul 2004
Posts: 27,294
Likes: 1,055
From: NM
Along those lines, might be worth taking the plugs out and cranking, just to see that it is free.
Thread Starter
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New User
Joined: Jun 2016
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The truck is a recent purchase. The engine started without a problem a few weeks ago. I just replaced the solenoid and I'm only getting 2 volts to the starter. It turns over with a ratchet. And the engine does have clean oil.
Believe Nothing
Joined: Jun 2004
Posts: 7,514
Likes: 398
From: W. Central FL.
Note. Voltage will drop at the starter but I don't ever remember seeing it go that low as 2 volts when the load is applied.
Edit: We may be dealing with a shorted starter but I doubt it. Have you adjusted the ground strap?
Thread Starter
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New User
Joined: Jun 2016
Posts: 16
Likes: 2
We charged up the battery a bit and she started right up! 
We took her for a spin around the block and everything was fine. We got back, shut the engine off, and when we tried to start it up again, it was the same noise as before. Could there be an issue with the generator/alternator that it isn't charging the battery? What should I check for? Thanks for all the advice.
We took her for a spin around the block and everything was fine. We got back, shut the engine off, and when we tried to start it up again, it was the same noise as before. Could there be an issue with the generator/alternator that it isn't charging the battery? What should I check for? Thanks for all the advice.
Senior User
Joined: Dec 2012
Posts: 221
Likes: 2
From: Wildwood, Mo
Justin, You are making progress. I would charge up the battery again and start it up. Then check the voltage across the battery. If it is charging you should read more than 7 volts. My guess is that it is not charging. Patrick