"I suppose this procedure is t
"I suppose this procedure is the same on any engine including the marine 318???
Adjust the points with a feeler gauge, as previously described, then attach the rotor and distributor cap.
Connect the dwell meter to the ignition circuit according to the manufacturer's instructions. One lead of the meter is connected to a ground and the other lead is connected to the distributor post on the coil. An adapter is usually provided for this purpose.
If the dwell meter has a set line on it, adjust the meter to zero the indicator.
Start the engine.
Be careful when working on any vehicle while the engine is running. Make sure that the transmission is in Neutral and that the parking brake is applied. Keep hands, clothing, tools, and test instrument wires clear of the rotating fan blades.
Observe the reading on the dwell meter. If the reading is within the specified range, turn the engine OFF, then remove the meter.
If the reading is above the specified range, the breaker point gap is too small. If the reading is below the specified range, the gap is too large. In either case, the engine must be stopped and the gap adjusted in the manner previously described. After making the adjustment, start the engine and check the reading on the dwell meter. When the correct reading is obtained, stop the engine, then disconnect the dwell meter.
Check the ignition timing, and adjust if necessary"