A-37 - Not really but I have sone books. This was an easy one Little trick is.<br /><br />I N T R O D U C E S<br />1 2 3 4 5 6 7 8 9 0<br /><br />Model #E10RCDB Line the letters (CD) up with the above scale.Always use this when the model looks like this. If its an older engine go to this web site.(http://www.kencook.com/kccwww/marinepubs/marinepubs.html)<br />steve