8 volt battery

Blackhole49 · Mar 25, 2015

I posted this with the original thread also.
Thanks for all the responses.
Not sure I'm going to try this, but I need to do something. I have a new battery, NOS solenoid, new large cables, and rebuilt starter. Generator works perfectly. When it is 0* out, it does not turn over fast enough to start. When I put my neighbors 8 volt battery in it, It starts as soon as you hit the button. I'm tired of waiting for warmer weather.

tim s · Mar 25, 2015

Don't discount the thought of a "new" battery being "Bad",,,it happens, especially at some auto part stores..

mite-help · Mar 25, 2015

seeing that 6 cyl. engine, I bet you do need a couple more volts. Me? I'd go with 12v. I think you can buy a 12v generator/alt. that has that identical look. lights, ign. not a big deal. lights on 8v probably maybe short lived anyhow

guido · Mar 25, 2015

Hello blackhole49,

Did not see the original thread. If it starts as soon as you put external voltage to the battery cables, it tells me two things. One is that you are getting proper voltage to the starter, so the starter is good, and two it sound like just a bad or discharged battery. You need to start from the battery posts to battery cables and look for voltage drop. From the negative cable to ground. From the positive cable to the starter, and every connection in between. You can try a ground jumper from the battery to ground, you may get lucky. But I'm betting on a voltage drop, while cranking the engine, between the battery and the started on the plus side. 6 volt systems are notorious for poor starting when all is good. AT 0 degrees you may have 60% of battery power available. Every connection must be clean and tight with zero resistance!

Guido.

Leroy · Mar 25, 2015

Lights are rated on them 6-8 volts so they are made for the 8 volt. No problem there for using an 8 volt battery.

DeltaRed · Mar 25, 2015

I agree. Go 12 volt instead of 8. Way better. And,go have the new battery checked.Bad ones happen sometimes. I recently bought a BRAND NEW 18.4x38 tire that was bad.So those things happen..... But,I'm curious,Didn't the original car use 6v?That worked fine,didn't it?So why won't 6v start the tractor?

Goose · Mar 25, 2015

This isn't Ford, or 8 volt, but one of my H Farmalls had a chronically slow starter. I had the large "00" cables on it, but when I replaced the ground cable with a braided steel cable, the starter speeded up to normal.

Must have been a bad cable. A cable can look good, but you don't know what is going on inside the outer cover.

dr sportster · Mar 25, 2015

That kinda tells me you just need a new 6 volt battery. Hydrometer test and load test.

Mel in SW Iowa · Mar 25, 2015

US Army maintenance taught us a long time ago to allow no more than .2 Volt drop across each connection when cranking or under normal load. Always seemed to work for me.

Oregon Tractor Jack · Mar 25, 2015

The problem I have with my 6V systems is the quality of the components that are available. I go to the local parts store to buy a starter switch and I get a Standard Ignition brand switch. Now Standard Ignition products should be some of the best right? I connect it all up and it works great about twice then it is garbage. You guessed it, it came from the land of almost right. There are other brands out there that are even worse, trust me I think I have tried all there are.... These switch just can't handle the amps needed for a 6V system. I have an H that has had everything either replaced or rebuilt and it is still very hard to start on 6V, all because the starter switch is trash. I just converted it to 12V for that reason. I ran it with an 8V battery for years before that.

Dean · Mar 25, 2015

Does the ignition system have a ballast resistor? If so, is it shorted out by the cranking circuit while cranking (only)?

The OEM 8N system did not use such system but most automotive systems do. Don't know how the Funk system is designed.

Dean

Old weldor · Mar 25, 2015

Ford cars and trucks used a group 2 6 volt battery, which is bigger and has more cranking amps than a group 1 battery. Your engine is from a car or truck, it needs a group 2. I know this because I grew up with 6 volt ford cars and trucks. Also make sure you have the correct size cables.

buickanddeere · Mar 25, 2015

9.2 volts is minimum to charge a 8volt battery.
It's a gas not a diesel so cranking rpms are of little importance. What does matter is the voltage across the coil. Odds are 99% there is a fault(s) that are reducing ignition coil voltage below 4volts. Your tractor is suffering from VD.

mite-help · Mar 25, 2015

I didn't notice those beams under tractor earlier. is that common for all funk conversions, or did they do that different on some?

Blackhole49 · Mar 26, 2015

B&D, beg to differ, it physically not turning over fast enough.

Blackhole49 · Mar 26, 2015

No ballast resistor.

Blackhole49 · Mar 26, 2015

The cables are brand new but anything is possible. I have tried heavy duty jumper cables to assist the cables with no discernible difference.

Blackhole49 · Mar 26, 2015

I must not have explained if right. I am installing the 8 volt in place of the 6 volt. The 6 volt is new and tests out fine. At the high end of good on a load test.

Blackhole49 · Mar 26, 2015

Haven't seen them all, but every 6cyl Funk conversion I've seen has had the beams.

JMOR · Mar 26, 2015

(quoted from post at 10:49:37 03/26/15) I must not have explained if right. I am installing the 8 volt in place of the 6 volt. The 6 volt is new and tests out fine. At the high end of good on a load test.

ee a lot of fresh paint there.........where & to what kind of surface does ground cable connect? Is the mating surface of starter to engine free of paint, etc.?

Ozlander · Mar 26, 2015

(quoted from post at 07:43:43 03/26/15) The cables are brand new but anything is possible. I have tried heavy duty jumper cables to assist the cables with no discernible difference.

With all that fresh paint, where do you connect the jumper cable to the frame and get a good ground?

buickanddeere · Mar 26, 2015

(quoted from post at 10:43:43 03/26/15) The cables are brand new but anything is possible. I have tried heavy duty jumper cables to assist the cables with no discernible difference.

Return cable from battery goes under a starter mounting bolt . All clean shinny surfaces.

mkirsch · Mar 26, 2015

The 8V will work for a while, but the stock charging system on your tractor will not adequately charge it. It will be acting like the old 6V in no time flat.

There is simply no commercially-available charging system for 8V electrical systems. No 8V generator, no 8V regulator, no 8V battery charger.

guido · Mar 27, 2015

Hello,

You stated that the neighbor's 8 volts system started you vehicle. You now say that you are in the process of installing an 8V system? Anyhow my answer will apply to any system. If you do not get the proper voltage to the starter, regardless of the battery voltage, you will have a no start condition just like you have now. The 8 Volts burst is overcoming a bad connection somewhere, and the 6 volts system cannot. If all the connections are resistance free and you have a good battery, that is all you need, 6 or 12 or 24 volts. If you 8 volts system goes down to 6 volts, what do you think will happen? NO start!

Guido.

8 volt battery

Well-known Member

Well-known Member

Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Member

Member

Well-known Member

Member

Well-known Member

Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Similar threads