IH cub magneto

[CLR1716]

I am having trouble with my cub ignition; the #1 plug will fire 2 or 3 times then stop when turning the engine over. New points, condensor, cap & rotor. Anyone have this issue before?

Thank You

 

[Charlie M]

Probably need a little more info. Does the same thing happen if you check other plugs or is it just #1. How are you checking for firing. If you try again later does it do the same thing. Does the tractor run or not run. Did it suddenly happen or after you put in the new points, condenser, etc and why did you put in the new points, condenser, etc.

 

[grandpa Love]

How are you determining that you don't have spark?

 

[grandpa Love]

Did you remove the magneto to replace the points? Did you time it back correctly? My video shows an H4 magneto but the cub J4 times exactly the same way.

 

[DaveBN]

Are you testing with the spark plug in the engine or out of the engine? If in the engine is it getting fouled with oil? If out of the engine could be a bad wire or one of the parts you replaced is bad.
Dave

 

[CLR1716]

I was mowing with the tractor & it died. I checked for fuel & that is fine. I pulled #1 plug & had no fire, grounding to head bolt. The plug is clean, no oil residue. I pulled the points & cond & they looked fine. I thought the cond was shorted so I replaced that. I did not remove the magneto.

 

[47fivewindow]

When I get one spark and then none I always suspect the condenser. If you got a new, bad one could be confusing.

 

[grandpa Love]

"Mowing and it died" .......my '45 A ,with a magneto started doing that, driving around fine and died like I cut the switch off. Several hours later it would fire up and run again. Replaced the coil, problem solved. If you replaced your points,you will need to vigorously clean the new ones ,they have a film on them. Your old condenser is likely good.