77 Evinrude 115 Not Starting

[Myata92]

I recently inherited a 1977 AMF Crestliner Apollo 660 with an Evinrude 115499S outboard that is in pretty decent shape. I've been working on pretty much everything but I have not been able to get the motor to start. It turns over really well with the new starter I put in but it will not fire. I bought the manual and have been following the instructions on certain items. So far I've pulled the carbs and cleaned them (little varnish but everything looks great, new spark plugs gaped at .04 according to the manual, new fuel pump, new gas through the system mixed 50:1, changed the lower end oil, and a new battery.

I've checked the compression and it has 96 PSI in 1, 91 PSI in 2, 95 PSI in 3, and 95 psi in 4. Then using spark check tools I hooked one up to all 4 and tried starting and it was very erratic and looked rather weak. The manual from there says to use a neon test light but from researching those are no longer in use. I've ordered the DVA Adapter for the multimeter but not sure where to go once it gets here. The manual says with weak spark on 4 cylinders it could be the Charge Coils, Power Pack, Key switch, 10 way connector. Any of these sound right? I'm in desperate need of direction at this point and winter is coming and would like to have it on the water a few times before winter storage!!

I took a video and have some pictures of the boat and motor but are too big to attach but I can email if need be.
I put the video on youtube: https://youtu.be/oBtkimWSDXE

 

[emdsapmgr]

First of all, your compression is somewhat low. 125 is a "normal" compression. It will probably run a 91, but will be down on hp. When doing ignition troubleshooting on a 77, I disregard the factory manual. Check out the ignition resource at this website: cdielectronics.com Theirs tests are both by ohms- and by cranking voltage outputs. I prefer the cranking voltage ouputs more (the factory did not list these for this year's engines.) For instance, the cranking stator outputs needs to be between 150 and 400 volts, only as measured with a DVA meter. I set my plugs at 0.30.