Ford 9N- No Spark

[trees132]

Hi Guys,

I have been working on a 9N that was sitting outside for a long time. We replaced the main wiring harness, resistor, plug wires, cap, rotor, points, condenser and still do not have any spark. Just wondering if someone could but together a few diagnostic points to check. The starter is spinning well. It is currently set up as 6-v pos. ground and would like to keep it as such. Greatly appreciate the advice!

Josh

 

[94BULLITT]

Is the rotor turning? What did you gap the points?

 

[trees132]

Is the rotor turning? What did you gap the points?

The rotor is turning. I gaped the points using the gauge included in the points kit.

 

[tony45]

If you haven't already, make sure you have 6volts at the coil with the switch on.

 

[tony45]

guessing you put new condenser in it also,if not could be your problem.

 

[tony45]

I know the points on mine are hard to set,I take plugs out and put in gear and rock tractor one way or the other to get the points cam in position and set them with the thickness of a match book cover.

 

[94BULLITT]

The rotor is turning. I gaped the points using the gauge included in the points kit.

Did you wipe the points off with a degreaser like brake clean? They have a film of oil on them.

 

[tony45]

no ,have you got voltage to coil?

 

[Soundguy]

rockingt he engine to move the cam.

are all you guys aware tha ton a 9n.. it has a front mount dizzy that comes of with 2 bolts.. then you carry it to your bench and install the points.. gap to .015 and then static time using a straight edge, 1/4" drill bit and the service manual... then reinstal..


DO clean the points after instalation.

Do make suree the advance works freely.

DO make sure you have power to the top of the coil with key on.

poitns open voltage = bat volts. with points closed.. it = less like 3-4v on a 6v system.. an d8-10 on a12v system using a 2.5 ohm oil.. less with oem coil..

 

[Soundguy]

on a front mount.. there is a direct connection fromthe coil to the cap thru a brass rod embedded in the cap. it is NOT accessable from t he outside.

coil rides atop the dizzy and captures the cap a bit.. so there is NO access to outgoing secondary connection to the cap.. OR the outgoing primary connetion tot he distribuitor concave head screw that is the union of the capacitor and insulated section of the points.

 

[jaotguy]

you are right I have no experience with ford 9n tractors .....


I assumed it was an older unit .. my bad ... the suggestions were to break down the problem into smaller units and trace each one ...


I will delete the post.

 

[Soundguy]

it IS an older unit. the 9N predated the 8N. 9n was 1939 , 2n 1942, 8n 1948 ( year models ).

the front mount ignitions was PRIOR tot he side mount.

some of your info was fine.. just some of the specifics will confuse the OP as they cannot be done as described due to the physical makeup of the distribuitor.

general advice is fine, untill you hit a left turn on a specific application and the OP shoots off a cliff when what he see's doesn't equate to what was advised.

that's all I'm saying.

your advice would have been fine for 51 and up machines..

 

[jaotguy]

the first part is the most important one ... check for power to the coil ... switches were known to go bad .....


As i said ,, post deleted

 

[Soundguy]

the first part is the most important one ... check for power to the coil ... switches were known to go bad .....

very bad.. junky even. much agreed.