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Oliver 77 engine miss!!
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Posted by wagsw900 on December 17, 2006 at 14:50:52 from (66.168.8.213):
Just purchased a 1951 Oliver 77 in mint condition. The only problem that there is that there is a slight miss i can hear at the exhaust. I used it for three hours and it ran like a top except for the miss. No smoke lots of power so I don't believe its a carb issue. The miss seems to go away when the engine is under a load. The owner said it needed diffrent plugs so I replaced the D16 Champions for 386 Autolites. Not a bit of diffrence. Cap rotor, spark plug wires and points all look visually fine. I am planning on changing all of that stuff to rule that out. So I am looking for some advice on what it would be. Could it be a bad valve, or worse:) Erik
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Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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