evinrude 140 crossflow troubles

[usmma2013]

Hey guys,
Evinrude 140 here, 1984 year. I went to start the motor for the 1st time this season. She fired up after several cranking and priming sets. Ran for a few minutes then pulled the plugs to inspect, the stbd (looking fwd) bank of cylinders has clean plugs - I mean CLEAN, no whitegrey water/oil mix, nothing. The port side looked normal. Stbd bank felt colder to the touch as well.
Previous history on this motor, bought the boat 2 years ago from a guy on this forum actually, great boat. Haven't had time between school and sea (Marine engineer in training) to do much work on her. I had her out once last year and she wouldn't get past 2k rpm or so. It revs up fine with no load. So I rebuilt the carbs, new primer bulb and fuel pump, adjusted Spark advance and carb link n sync. Compression is 120 120 125 115. Then I had to go back to school so put the boat away. I did notice that the p/o had removed the thermostats (which I put back in today).
So my question is, is this more likely a water intrusion issue or somehow is the stbd bank is somehow not getting enough fuel?

I've attached a video of the motor running today, maybe one of the OMC gurus can listen to it.
http://www.youtube.com/watch?v=zBdZjdLv_6E


I've also attached a picture of the plugs. The dirty one is from the port side and clean one from the stbd. Plugs on each bank look identical.

[phatdaddy]

i am by no means a mechanical guru, but i wll throw out the first (probably wrong) opinion.
are you sure that side is firing? that might explain why only 2000 rpm under load.

[usmma2013]

Well there is good spark on that side, I have yet to get a real spark tester and make sure it's jumping within spec though so maybe its not strong enough.
But I figured even if there wasn't, there should be a little residual fuel left on the plugs (like most other 2 strokes I have owned) right? That's why I believe it is somehow not getting fuel. I don't understand how with two 2-barrel carbs (freshly rebuilt) could be feeding only one side of the engine.

Another question, this motor has small vacuum (i think) lines coming off nipples on the transfer covers. One I can see leads the bottom of the front of the intake, the others I can't see. What is the function of these lines?

[Skools Out]

first thing what ever cylinder that dry plug came out of it has no fuel so it is a dead hole for sure. second get a set of Champion L77JC4 plugs for it, those V plug suck usually on the older ign. systems. as for first problem it is pointing to your reeds since you rebuilt the carbs or you have a carb stopped up some where. from hearing it you have a skip / dead hole for sure. you may have a broken reed for that cylinder or a bad carb.

[usmma2013]

PUlled the intake today, reeds were in great shape. Pulled the exhaust covers and found a huge mess of water intrusion, see pictures. I guess I'm going to inspect the manifolds for cracks and go from there..

[Skools Out]

hold the reeds up in the light and make sure you can't see any light around the reeds.