Re: Evinrude 1976 135 spark problems 683D
Likely two of the wires from the new power pack are wired incorrectly, causing the backfire, so double-check your work. According to my factory service manual, the wires from a factory power pack to the coils are as follows: #3 terminal feeds #2 coil, #5 terminal feeds #4 coil, #10 terminal feeds #1 coil and #11 terminal feeds # 3 coil. Regarding the manuals for your engine: the service manual is the on you need (probably the most expensive of the 3). The exploded parts lists for your engine are online at a number of websites, including the factory site: epc.brp.com. I doubt you need the operator's manual-esp if you get the service manual.