Joe Williams
Well-known member
this might be a dumb question but what causes low spark?
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low spark
- Thread starter Joe Williams
- Start date
Help Support IH Cub Cadet Tractor Forum:
- Joined
- Dec 6, 2018
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- Justin Bratton
Assuming you have a battery ignition:
Bad connection
Bad coil
Bad condenser
Bad spark plug
Bad connection
Bad coil
Bad condenser
Bad spark plug
mgonitzke
Well-known member
What model tractor?
- Joined
- Aug 20, 2023
- Messages
- 161
Incorrect point gap can cause "low spark", as can a faulty, but not completely shorted condenser.
Joe,questions aren't dumb ...sometimes the answers can be....keep asking..
Joe Williams
Well-known member
Joe Williams
Well-known member
105
I might add crappy, corroded, improperly spliced wiring w/corroded terminals at the switch and throughout the length of the wire.
Electrons do not like cruddy corroded conductors and get hot due to increased resistance and have a tendency to self destruct plastic connectors etc.
If your wiring is stiff as apiece of #9 wire and hard as a rock it's time for a new harness.
Electrons do not like cruddy corroded conductors and get hot due to increased resistance and have a tendency to self destruct plastic connectors etc.
If your wiring is stiff as apiece of #9 wire and hard as a rock it's time for a new harness.
Joe Williams
Well-known member
should there be voltage on the plus side of coil when you turn on switch?
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- Aug 20, 2023
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With the ignition switch on, the "+" connection on the coil should be battery voltage. The "-" coil connection goes to the points.
Joe Williams
Well-known member
yea i'm not getting any voltage to the coil
- Joined
- Aug 20, 2023
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- 161
Do you have the model 105 wiring diagram? You can get it off of Google.
Joe Williams
Well-known member
thanks i dont have one ill look it up
- Joined
- Aug 20, 2023
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Print it out. It will be easier to use out at the tractor.
Joe, a jumper wire with alligator clips on the ends...one on batt. pos. ..one to pos. on coil should give you the answer....if it works it's connections or switch..
lpalma
Well-known member
Points plunger made need to be replaced also.
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- Aug 20, 2023
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Pull the spark plug and rotate the engine to top center on compression and set your points to .020" (going from memory here). Rotate the engine a few more times, and if the point gap holds, your pushrod is likely OK. Mine is the original in my 60 year old model 100, and is still working fine.
lpalma
Well-known member
You cannot see the piston from the spark plug hole. Use the mark on the flywheel to determine TDC.
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- Aug 20, 2023
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Use a thumb. It'll be close enough.
