Re: 1955 Evinrude 25hp Big Twin No Start

[gameroomfan]

Hello gain guys. First of all, let me apologize for the delay in getting back to you with a report. Death in the family, and other life issues, not to mention other projects and actual fly fishing got in the way. I just spent 2 days digging further, and the results are below, along with follow ups to the suggestions previously posted:

Coils – pulled the flywheel and they look to be fine. Looks like someone recently replaced them
https://photos.google.com/search/_tra_/ … uN8ecXp8Hi
https://photos.google.com/search/_tra_/ … ad_p5BOhdp

Needle Packing Gaskets- replaced gaskets, 3 per needle. This solved the gas leakage from the needle seat/packing area I was seeing previously

Fuel Filter – gas is getting to the carb… I know, because gas was leaking profusely from the carb lower needle (see above)

Compression – forgot to double check before I began dissassembly. I realize this could be the root cause. But wanted to see what else was wrong before I attempted another start. I will say the fly wheel has pretty good "snap over" just from feel. Will test again once I have the other issues sorted (see below)

Magnet Check – magnet pulls on a screw driver pretty well. Same force as a Gale 25 hp magnet I have from another refurb project

Serial # is: 14252

Additional issues discovered:

Leaking upper crankshaft seal – Pulled the old one, and replaced with OEM
https://photos.google.com/search/_tra_/ … jsaVoJ9S7B
https://photos.google.com/search/_tra_/ … 8rwicm-ndX
https://photos.google.com/photo/AF1QipN … njhFL-mQze

Cracked flywheel – not sure what to do about this one. Looks like some sort of metal fatigue. I have visions of the flywheel disintigrating at full throttle. Thoughts?
https://photos.google.com/search/_tra_/ … GF-pLyq2cV

Set the timing – I bought the timing fixture from Richard (a great tool). Wasn’t sure what the throttle control cam position should be when setting points. I looked closer, and noticed what from my auto experience appeared to be a timing mark. So I set the points at that throttle position. Is this correct? See pic.
https://photos.google.com/photo/AF1QipO … HnzhSog3Do

Friction between flywheel & armarture plate – this is a strange one. When rotated, the flywheel ‘grabs’ the plate, so that the plate at times rotates several degrees along with the flywheel. Not good, and maybe a no start contributor. I inspected closely, and gently ground off some burrs and uneven spots (Dremel) , etc both from the fly wheel and mating surfaces of the plate. Still grabbing. I then tried the Gale flywheel, and its grabbing too. Anyone seen this before? I will double check coil laminate alignment, but I think those are good, as I used Richards alignment ring for this and visually they are even with the plate bosses.

Last, Vacuum cut off swith wiring – I found the wire was loose and not connected. From my experience with the Gale magneto, this wire is routed up through the bottom of the armature plate, and connects to the insulated side of one set of points. I assume the vacuum swith grounds the points to shut off the motor. The Evinrude arm plate is a slightly different design, with no hole in the bottom of the plate, or routing clues. I wound up shearing the wire off while rotating the flywheel for setting the points because of misrouting. Interested in how this wire should be routed for the Evinrude.
https://photos.google.com/photo/AF1QipM … exTu_JiSyI

Well, thats it for now. I will attempt to be more prompt in my followups, but life does go on. I would like to get this thing running (pricing new 25 hp motors does provide some incentive)<smile>.

alex