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Reviews (5)
19 Feb, 2025
Good source for vacuum tubes
Product as advertised.
29 Jun, 2016
You get what you pay for.
1 of 1 found this helpful The instruction sheet is a joke. Good luck on understanding it. Don't put the battery in the way they say, put the PLUS side of the battery up.
Still not sure I understand what S1 number to use. (relates to the type of engine and number of cylinders.)
The signal cable should be shielded. It's not. It has the two wires, which are not described in the instruction sheet on how to connect. I assumed that the red was to be wrapped around the plug wire and the black to ground, I guess.
The little I have used this so far has not given me confidence in the rpm readings. They jump all over the place. I may add some shielding over the cable to see if that helps.
Sorry, but I can not recommend this. It's only $14 so you can throw it away if not happy.
17 Aug, 2021
Priced right
Battery was the correct size and works.