<p style="MARGIN: 0in 0in 0pt" class="MsoNormal"><span style="FONT-SIZE: 9pt; FONT-FAMILY: "Arial","sans-serif"">10-12 On </span><span style="FONT-SIZE: 10pt; FONT-FAMILY: "Verdana","sans-serif"; mso-bidi-font-family: Arial">compression </span><span style="FONT-SIZE: 9pt; FONT-FAMILY: "Arial","sans-serif"">is right.  Not 4.  what you are doing is bring the piston up all the way.  Let the compression leak off.  then move it back and forth.  You will see that it will be about 10 to 12.  divide in 1/2 and that is TDC, set timing.  run engine see what you get with rpm.  Move timing to see if you get more or less.  Set it for the best running that you like and your done.   it is not that hard and no one will die with a off timing RC plane.

</p></span></p><p style="MARGIN: 0in 0in 0pt" class="MsoNormal">

<font size="3" face="Calibri"> </font></p></p>

</p>