Re: Engine Popping Noise
That was about 1 knock every second, the engine was doing about 600rpm, which means a knock every 10 revs... so nothing engine, or it would be more frequent... drive gears are 1.5:1 (20/22 teeth), so each tooth meets the same tooth again every .... 10 revs...
Pull the drive and see if it still does it... One of the things it could be is a tooth missing in the upper drive... Removing the drive will isolate it... Also pull the plugs and do a compression test and 'read' the plugs... You can garner a lot about the combustion process from the plug firing ends... When you pull them, keep a note of which pot each plug belongs in...
Chris.....