One of the big problems with waking up a stovebolt engine after a long sleep is sticky valves. Sometimes it doesn't happen right away, but after a little running time. Gummy deposits will sieze up a valve stem and cause bent pushrods, or sometimes contact between the intake valves and the pistons. Spend a lot of time getting the valves freed up, with plenty of penetrating oil on the valve springs and stems, and give the first few gallons of gas you run through the engine a heavy dose of Sea Foam, an upper-cylinder lubricant that mixes with the gas.
For the cylinders, pour a couple of ounces of Kroil into each spark plug hole, and let it sit for a week or so. Then drain it out of the oil pan and pour it through again. Kroil will actually penetrate through rust, and end up in the pan.
www.kanolabs.comNo, I don't work for the company- - - -I've just used their products for 40 years! Kroil is the best penetrating oil on the market- - - -hands down!
Once the engine is turning freely and the fuel system is clean, install fresh spark plugs, new points and condenser, set the timing, and fire it up!
Jerry