Re: 25 HP Evenrude won't power up
You must make sure the carb-to-ignition timing is correct. I forget the proper term for it. As you trottle-up the timing advances at the same time. There should be some marks on the cam that the roller indexes to just as the throttle opens. From what I remember, when you first start to give it throttle, the timing slightly advances first. Then a cam hits a roller that opens the throttle. This timing of this sequence is important. Adjust it like the book says. If you still get a little hesitation off idle, advance the timing on this setting a little. Like, make sure you get a little more timing advance before the throttle opens.<br /><br />Good luck,<br />D. L.