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8n backfires

To get a more precise answer to that question, we need some more info about the tractor.

When you ask a question here, it’s always important to tell us:

1. The model of your tractor (2N, 9N, 8N, NAA, etc).

2. If it is 6v or 12v.

3. If it’s an N, if the distributor is on the front or side of the engine.

4. If it has any major parts that are not OEM, such as electronic ignition, an in-line fuel filter, a Zenith carb, an 8v battery, a side coil on a front distributor, etc.

Troubleshooting is different depending on the model of the tractor, voltage, ignition system & distributor placement & the absence of OEM parts.

And, ask your uncle when was the last time he changed the points/plugs/condenser/rotor & cap.
50 Tips
 
in addition to the info bruce requested.. are there any other symptoms that coincide witht he BF? like hunting throttle.. weakness / loss of hp/

is it really a backfire or an afterfire?

soundguy
 
how can i tell the diference of bcackfire or afterfire...it dont have any problems until it been worked hard for 2 or 3 hours...thank yall for your help...it is realy appreciated...
 
Mike.......2-hrs of running and then "backfiring" is almost always weak sparkies from yer 4-nipple frontmount squarecan ignition coil. It takes about 1-hr before the internal insulative tar melts and shorts out some windings causing weak sparkies and backfiring. Do I haffta tell you to replace yer uncles squarecan ignition coil???

Caution; there are 2-versions of the squarecan ignition coil. The original 6V-coil and modern 12V-coil. Unfortunately, you can NOT tell the difference by looking at them. You haffta read the lable on the box.

Since yer uncles tractor is a successful 12V conversion with alternator using a 12-to-6V converting resistor. I'd gitt the 6V-coil. Understand? And yes, either squarecan coil needs the "infamous ballast resistor". .......Dell, yer self-appointed sparkie-meister
 
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