Hello folks,,Oljo here again.I seem to be having a bit of luck with my old Johnson.70 hp ..1975 model.I replaced every fuel line.Cleaned the carbs,,3 times,replaced needle valves and seats in all three carbs and I'm finally running better.Now,,I've messed with the spark advance adjustment screw.Can anyone put me on a link to timing this motor?Or give Me a starting point? I can get it to run out now but it's slow on take off. Thanks,,,Oljo