It is not likely as big an issue as you think. What you’re calling “carbon” sounds more like a mix of unburnt fuel and oil dripping out through the exhaust system. if you hung the motor upright for a few days after running it, you’ll find the same puddle of goo building up under the lower unit. The water you speak of is just the cylinder water jacket draining because you laid the motor on its side. After you run them, water stays in the cylinder water passages until its drained. What you did is lay the motor on its side, which allows the curly tube on one side to act as the vent, and gravity allows the residual cooling water to siphon out of the other. Which is a good thing, because you don’t need to have cooling water sit in the cylinders while the motor is in storage. Neither of these conditions are going to cause any trouble on the interior of the cylinder, so let me stop you right there and move on to what may actually be happening with your motor
To be frank, if it hasn’t been used since 1969 and it fired right up for you, i’ll say for the record that you’re extremely lucky. As for why it doesn’t run properly now, I can tell you that the first thing I’d suspect is the ignition system for the simple reason that the condensers hidden inside the coil usually go bad just because of their age. If I had a dollar for every time I’ve been asked about a revived Elto that ran great the first time it was run, then gave headaches after that because of the ignition system, I’d have a pretty big pile of dollars to play with. So I would suspect the condenser first off. Second would be the condition of the spark plug leads themselves. How good is the insulation on the wires? How solid is the connection at the coil? You need to check for spark, both in the open air and under compression. If you don’t have an in-line spark tester, either buy or borrow one, they are a valuable tool in diagnosing spark issues. Once you’ve done some actual testing to eliminate or confirm ignition system fitness, then you can move onto things like fuel supply, plugged port openings, plugged exhaust, and so on, that might cause performance issues. But with any Elto, the first thing to investigate is the ignition system, so take it from there.
Hope this helps.
Best,
PM T2
Elto Special Interest Group Leader (Interim), AOMCI
He's livin' in his own private Idaho..... I hope to go out quietly in my sleep, like my grand-dad did..... and not screaming, like the passengers in his car...
