I have just acquired a 1967 ATCO 20 " mower and the only designation I can find on the machine is a tag with F24 and a number. I have failed to find any reference to this model save for a spares manual which it shares with the D14 model. The machine works and cuts reasonably well but I started to tinker with it to see if there was anything amiss. The carb has been removed and thoroughly cleaned but not yet reset from the 'as found' settings. I have removed the head and cleaned the piston and the head of all gunge that had collected. Spark plug cleaned and the engine fired up again. So far so good. I then had a look at the chain drives and the main cutter drive chain had been adjusted to its max and was touching itself in the middle. Perhaps the chain is too long. I have read other posts about a similar problem which in principle is the same as on my model but referred to a different model. I can find no information on the number of links there should be on the F24 drive chains or the number of teeth on the drive sprockets. The cutter chainwheel assembly seems to have 21 tooth and 9 tooth sprockets. I have seen on the web 20 tooth and 9 tooth sprocket assembly available and wondered if this would work on the F24. Are parts for the F24 interchangeable with any other model of this vintage and if so which one. Unless I can find new or refurbed parts I will just have to manage with what I have got.
Any other info on this model would be welcomed