25 hp evinrude sparking inconsistent

[stingertrey]

Hey guys, I used to frequent here a while back but its been a while!.. Either way I recently picked up a 25 hp evinrude tiller steer that my uncle gave to me. Says last he ran it all was fine but its been years. First thing I did was give it a few rips to see if it was sparking, there was no visual spark (cant find my tester). I changed the plugs from another evinrude engine that I know starts right up. I then grabbed the plug with my hand hoping to get a jolt, ripped it the first time and felt a good jolt, kept ripping and was getting nothing after that first pull. let it sit for a bit then tried it again on the opposite plug and had the same result. I now have the flywheel off, points may be a lil dirty, coils LOOK fine, condenser also LOOK fine. I know looks mean nothing but it passed the visual inspection, no chaffed wires, cracked coils. What would you guys do next? How much does it typically cost to replace everything under these flywheels?? coils, points, condensers?? Thanks for all the help

 

[Daviet]

Re: 25 hp evinrude sparking inconsistent

I guess the first thing I would do is clean and reset the points and make sure they are opening and closing correctly with an ohm meter.
Make sure the coils are set properly and all the electrical connections are clean and tight.

 

[stingertrey]

Re: 25 hp evinrude sparking inconsistent

How do I test them with an ohm meter

 

[Daviet]

Re: 25 hp evinrude sparking inconsistent

Leave all the wires off of the points. Attach one leed from the meter to the spot where the wires attach to the points. Attach the other leed to the mag plate. Put the nut back on the crank and use a wrench to rotate the crank, when the points close you should see the meter register. Switch the leed to the other set of points and do the same thing. This will tell you if the points are grounding when they are closed.