hi they are good little engine,s there must be around 20 at home of the various models,, youre,s is an early to mid seventy,s model because it had the ,,plastic,, govenor gear
the manufacturing date is stamped on the flywheel,, asuming that the flywheel is original..
1 reason they can be awefull starters and erratic runners is the carb to inlet joint ,,, the carb flange is ,,prone,,to warping..
best to part the joint ,,clean well ,,then check it with a good straight edge ,, and if needs be level it up carefully with a file ,
also be carefull ressetting the govenor ,,arm,, on its ,,pinch,,, bolt as the tend to over rev ,,go,, berserk,, and have even been known to self ,,,,,,,,,,destruct,,,,
if you need any parts get in touch and i,ll have a look through all the boxes of ,,used,, bits. i,v got a fair amount of new small engine parts but the most popular villiers stuff is running out at home now..