I have a 8n that has a one wire 6v generator with a newer cut off relay. When starting it the amp gauge don't move the battery voltage don't show a charge, open the throttle a 1/4 it barely comes off 0 towards charging. Wide open throttle it shows between 5-10 amps. Times I started the tractor the battery barely has enough juice to turn it over. The battery is only a year was store in the basement during the winter.
- Thread starter garr806
- Start date
Bruce (VA)
Well-known Member
" I have a 8n that has a one wire 6v generator with a newer cut off relay"
I've never seen that set up.
2N's & 9N's had a one wire generator & a cut out. 8N's had a 3-wire generator & a v/r.
Are you sure it's an 8N?
All that being said......
It's a generator. It doesn't charge well at low RPM's.
" Times I started the tractor the battery barely has enough juice to turn it over. "
Have you checked the battery? (see tip # 49)
How about your connections, cables etc?
75 Tips
I've never seen that set up.
2N's & 9N's had a one wire generator & a cut out. 8N's had a 3-wire generator & a v/r.
Are you sure it's an 8N?
All that being said......
It's a generator. It doesn't charge well at low RPM's.
" Times I started the tractor the battery barely has enough juice to turn it over. "
Have you checked the battery? (see tip # 49)
How about your connections, cables etc?
75 Tips
"Wide open throttle it shows between 5-10 amps. "
Sounds about right. What voltage does the battery read when running?
"Times I started the tractor the battery barely has enough juice to turn it over."
Good clean and tight battery connection? If so, might consider having the starter motor rebuilt.
Sounds about right. What voltage does the battery read when running?
"Times I started the tractor the battery barely has enough juice to turn it over."
Good clean and tight battery connection? If so, might consider having the starter motor rebuilt.
Bruce (VA)
Well-known Member
Interesting. An 8N w/ a 9N charging system.
Have you checked the battery? (see tip # 49)
How about your connections, cables etc?
Clean grounds & battery terminals are always important. Don’t forget to loosen the starter from the block (see tip # 36) and polish the block & all starter mating surfaces w/ sandpaper to insure a good electrical ground.
If you can’t remember the last time you replaced the battery cables, it’s time to do it. Just because the terminals are clean doesn’t mean there is no corrosion under the insulation. And, this is another case where size matters (see tip # 41)
A charged battery, clean grounds & new cables aren’t going to mean much if the tractor needs a tune-up. At a minimum, every fall, remove the cap, check the points for pitting or burning, re-gap them & put a dab of lube on the cam. (BTW…..if you’ve wondered why some folks get years of use out of a set of points…….this is one of the reasons).
75 Tips
Have you checked the battery? (see tip # 49)
How about your connections, cables etc?
Clean grounds & battery terminals are always important. Don’t forget to loosen the starter from the block (see tip # 36) and polish the block & all starter mating surfaces w/ sandpaper to insure a good electrical ground.
If you can’t remember the last time you replaced the battery cables, it’s time to do it. Just because the terminals are clean doesn’t mean there is no corrosion under the insulation. And, this is another case where size matters (see tip # 41)
A charged battery, clean grounds & new cables aren’t going to mean much if the tractor needs a tune-up. At a minimum, every fall, remove the cap, check the points for pitting or burning, re-gap them & put a dab of lube on the cam. (BTW…..if you’ve wondered why some folks get years of use out of a set of points…….this is one of the reasons).
75 Tips
Bruce (VA)
Well-known Member
I have seen that before. It will work. It is a electronic cutout instead of points that open and close. It is sensitive to the proper
polarity. In other words, if you reverse the polarity it will let the smoke out! If you battery shows upwards of 7 volts when running then
you are OK to go.
polarity. In other words, if you reverse the polarity it will let the smoke out! If you battery shows upwards of 7 volts when running then
you are OK to go.
garr.........unlike 12-volt alternators, 6-volt generators don't charge at idle. To even start yer 6-volt engine, the throttle lever hazzta be at least 1/3-thottle. While a warmed-up N-Engine will idle at 450-rpms, (ennythang under 500rpms is good) It takes about 1/2-2/3'rds throttle 1/4-hr (15-mins) to keep the genny charging enuff to replace the AMPS sucked out the battery to start yer engine. As fer yer 1-wire 6-volt genny. You do know that the 1-wire genny has a 3rd-brush screwdriver charge adjust, don't you? That means you haffta hopp off'n yer butt-buckett and adjust the genny screw and walk around to the AMP-meter and read the amps charge. Normally, you like to see between 3-5 amps charge (+). Generally, the only time to worry about it is when you have headlites ON-or-OFF. The i-wire genny is 11-amps MAX design. Bottom line: genny's don't charge at idle; genny's max out at about 1800-rpms. Engine max is 2200-rpms. BTW: lead-acid batterys are very sensitive to TEMP's. When Dad first got this USED 1941 Plymouth in 1947; he would remove the 6-volt battery every nite and place it next to the coal furnace. Guess who hadda haul buckets of COAL? This was in COLD Durango, Colo where temps of MINUS -20F was common. At least it started. ........the COLD Dell
BTW......whether mechanical or solid state; the cut-off relay just disconnects the battery from the genny so it don't discharge yer battery overnite.
BTW......whether mechanical or solid state; the cut-off relay just disconnects the battery from the genny so it don't discharge yer battery overnite.
I have a similar cutout on my '41 9n. I had the generator rebuilt at a generator shop in town,and when he
called to tell me to come pick it up[and pay], he said I should bring my cutout with me. When he tested
the genny,the cutout wasn't working right,so I bit the bullet,and for another $15-16,I got the cutout. My
tractor charges perfectly now,and I warm it up with the third brush adjuster set on Hi,at a fast idle
showing about 5-8 amps. When mowing or plowing,turn it down or you'll boil out the acid in your battery.
I do keep a battery maintainer on it overnight when It's sitting for a spell. I took Bruce's advice and
got a Deka battery,always starts right up.
called to tell me to come pick it up[and pay], he said I should bring my cutout with me. When he tested
the genny,the cutout wasn't working right,so I bit the bullet,and for another $15-16,I got the cutout. My
tractor charges perfectly now,and I warm it up with the third brush adjuster set on Hi,at a fast idle
showing about 5-8 amps. When mowing or plowing,turn it down or you'll boil out the acid in your battery.
I do keep a battery maintainer on it overnight when It's sitting for a spell. I took Bruce's advice and
got a Deka battery,always starts right up.
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