8N ignition problem

Tom Massachusetts · Feb 6, 2019

I have a 48 8n ft coil. It will not start cold, first start of the day, unless I run a jumper to the coil from a battery, then starts GREAT. It is 12v and turns over real good, not a bad battery. It still has the original white resistor in line. Tried changing the coil, it is a 12v coil. It runs good without the jumper and starts fine when warmed up.

HCooke · Feb 6, 2019

"It still has the original white resistor in line."

The white resistor is not original. Remove it and you will be fine. Should use the ballast resistor that is located on the engine side of the
dash.

Tim PloughNman Daley RIP · Feb 6, 2019

Yes, as HC said -12V front coil -NO external 1-OHM ceramic resistor. However, I suspect that is not your problem. Is the battery good? It must sustain a full charge under load, NOT simply slapping a charger on it. Get a starter shop to bench test it, replace if junk with a GOOD brand. Secondly, verify the wiring is all CORRECT. Your comment "...still has the original white resistor..." tells me you don't really know what was original. Just because it came with it when YOU bought it does not mean it is an original part. Get the essential manuals if you want to do the work yourself. Answer these questions: Are the OEM generator and voltage regulator removed from the circuit? OEM Ballast Resistor in place? 12V alternator now? Starter with 3-wire solenoid? OEM-type Ignition switch? When was the last distributor tuneup? Any lights in the system? verify wiring, and doesn't mean looking at colors -do continuity test. Disconnect lights to eliminate a possible short - can reconnect later when the true root cause is revealed.

Tim *PloughNman* Daley(MI)

Tom Massachusetts · Feb 6, 2019

The battery is very good cranks the starter fine, has been checked out by local batt shop. The tractor has a 1 wire alt that charges good. The resistor that I mentioned is a white one on the back side of the dash. New lights that I wired with a new switch and fused, work fine.

HFJ · Feb 6, 2019

tom, it doesn't matter where that white resistor is mounted, it should not be used with a 12 volt coil. the only function it has in your setup is to make your tractor hard to start.

u should have the OEM ballast resistor in the circuit, but not a white ceramic one. this is the only one u should have:

Farmer Dan · Feb 6, 2019

Only use the resistor that HFJ posted a picture of. It starts out cold with low resistance to give more current to the coil, then as it gets hot it increases resistance to lower the current and protect the coil. Take off the white ceramic one and give it to somebody you don't like.

Tom Massachusetts · Feb 6, 2019

Thanks guys, Just ordered one up. Sounds like that is the problem.

HFJ · Feb 6, 2019

(quoted from post at 14:09:56 02/06/19) Thanks guys, Just ordered one up. Sounds like that is the problem.

you're welcome. happy to help

Take off the white ceramic one and give it to somebody you don't like.

:lol:

8N ignition problem

Tom Massachusetts

Member

HCooke

Well-known Member

Tim PloughNman Daley RIP

Well-known Member

Tom Massachusetts

Member

HFJ

Well-known Member

Farmer Dan

Member

Tom Massachusetts

Member

HFJ

Well-known Member

Similar threads