Hi guys, i have an evinrude fastwin 18 HP from 1967. I have to fix a breaker point but i don´t know when the switch must be opened ( how many milimeters before the piston is on the top ).I also don´t know in what position must be the handle of gas in that moment when i am fixing the breaker points. I have also a problem that when I start the motor it runs only for a few seconds, what can be a reason of this? <br />Please help, i´m new in outboards world!!<br />Thanks !