95 70hp Evinrude weak spark all cylinders

[smitdog]

Here is my problem, I bought a used 1995 70hp evinrude outboard and from day one it seems to have a rough idle. It will start right up when cold and when under way it will cruise with no problem as long as you want. Once you shut it off it almost never starts back up. It acts like it is flooded. Since this seems like a hot issue I can not get it to act up on the muffs. Here is what I did so far. Removed all three cards and rebuilt, adjusted carbs as well as i could while running rough, Did compression test. I am getting 130+psi on all cylinders. Replaced spark plugs and gapped properly. Checked to make sure timming advance is working. Here is where I found my problem, when checking for spark I noticed that the spark was intermittent and sometimes weak to all the cylinders. How do I test the power pack and does it sound like I am going down the right path? Also what is a good starting point for turns out on the adjustment screws on the carbs? Please help, I am losing my mind! thanks

 

[HybridMX6]

Re: 95 70hp Evinrude weak spark all cylinders

For the carb screws, I"ve always heard start off at 1.5 turns out, and go from there. Adjust each carb individually, and you must do it while on the water. Doing it on muffs will not solve the problem.
I have heard of them being as far as 3 turns out, so just be patient with it.
And also, just a thought, but could it be as simple as the cable for the controls needs adjustment to raise the idle up a little bit when it neutral or when idling?

 

[tashasdaddy]

Re: 95 70hp Evinrude weak spark all cylinders

clean all electrical connection, don't look at them, clean them battery cables also both ends. get a spark checker and see if the spark will jump 7/16 of an inch.

 

[smitdog]

Re: 95 70hp Evinrude weak spark all cylinders

Thanks guys. I am going to buy that spark tester tonight and set those carbs up again. If all the connections are good and the spark doesnt jump that gap where to next.