[tsubaki]

Thanks Theferm, at least I got some ideas now of the possible problems. To top things off I never checked the plug gaps on the L77JC4 plugs, come to find out they were between 25-32 instead of 40 like recommended.
Cleaned and replaced floats and valves in two of the carbs yesterday and found no real contaminations.
Had water lines on two of the floats but no evidence of varnish.
Waiting on the last carb kit.
Might remove the t-stat covers today.