Re: 1970 70hp johnson ohms tests please help
No letter means 0 - 1000 ohms
K means kilo-ohm. One kilo-ohm is 1000 ohms.
M means meg-ohm. One meg-ohm is I million ohms.
You need to keep an eye out for the decimal point, if you are on the K scale and you get a reading of 0.5K (for example), this is 500ohms.
The lowest (and more precise) part of the scale is 0 to 1000, the next scale is the K scale, the final scale is the M scale.
Depending on what you are testing will determine which scale to use. Your manual should give you a range of values and you would choose a scale accordingly.
