I own three different cylinder mowers which include a Suffolk Super Colt, Qualcast Commodore and 35DL. All beautiful mowers but a pain when they do not work correctly.
The two questions I would like to ask is that I have recently cleaned a Suffolk Super Colt lawnmower, but there is blue smoke coming out of the exhaust with an unburnt fuel smell when accelerating/on high revs . So obviously it is burning too rich but I am unsure what screws to adjust on the Zenith Carburettor. I have attached photographs, I do not want to adjust anything else without some professional advice as there are many different types.
The second question is how to get the lawnmower to idle without 'jumping/revving up slightly', I can only get the lawnmower to idle when I hold the lever (marked with a white circle) back; It is well worn and lose. So it can idle with assistance.
Please note that the lawnmower has had a correct oil change, fresh fuel, new air filter and spark plug. There is no burning oil smell. I know the lawnmower is old so it won't work like its new but want it tuned to where it should be (VERY well used over the years).
Chris and John