Tach C2 Capacitor rating

[Enrique Claure <spanlab@ceibo.entelnet.bo>]

Hi list, I removed my Tach today to see what is wrong. Power to the tach 
seems to be fine but the tach did not jump when I gave it a short 12 V jump 
start.

I disassembled the tach as described in Paul's web page. The first step to 
fixing the tach is to replace the C2 capacitor (0.25uF). My question is: 
The blue capacitor on top of the transistor has no specified rating marked 
on it. All I can read is  47u/ 10V /J6 stamped on it. Are these always 
0.25uf and not 47uF?  Thanks for the help. Enrique