Hello Kevin,
The Qualcast Cultimatic B66 was in fact the Merry Tiller Cadet re-badged as a Qualcast and fitted with the Qualcast/Suffolk/Atco A114 four stroke engine.
It will date from 1985 to, I think, circa 1989.
Your machine should not be confused with a totally different design of Qualcast rotavator that was sold previously also as a Cultimatic.
Qualcast/Atco acquired the garden machinery range of Wolseley Webb in 1984 and this included the Merry Tiller range.. hence they had the MT Cadet chassis which could be used for the Cultimatic B66.
You should be ok using Unleaded Petrol.
Do keep a good check on the sump oil...check and top up, if required, before every run.
Sae30 is the oil to use or Sae20w50.
The engine oil should be visible when you remove the oil filler cap (with engine switched off, of course.!!)...It should be full so that with the engine set level the oil is level with the lip of the filler hole.. ie; anymore and it would run out.
I think the A114 oil capacity at full is half a pint.??.
I am not familiar with the quantity of oil for the chaincase of the tiller.. but if you are making enquiries ...I suspect it will be the same as for the Wolseley Webb/Atco Merry Tiller Cadet.
Parts drawings can be found on this link;...
http://www.bartrammowers.co.uk/partfind ... Cultimatic
Some early versions of the A114 Qualcast/Suffolk engine could tend to have their moments.!! and were subject to several detail changes over its production.
The models fitted with a Dellorto carburettor had some carb tuning/running dificulties when fitted to some machines.
On engines fitted with a Dellorto carburettor the recommendation was to open up the Champion J8C spark plug gap to a massive 40 thou of an inch.
Also they sometimes took a while to warm up enough to run with the choke fully open and sometimes had to have a brief period with the choke set at the mid position.
The tuning instructions were changed so that, on some engines, a lumpy tickover had to accepted in order to get good main running performance..this particularly applied when on Atco/Qualcast mowers. The engine was warmed up to normal operating temp..then the throttle set to tickover and the side carb' tickover mixture screw was adjusted to give optimum tickover. Then a final setting of this screw was made by setting it a quarter turn richer....I can't remember which way this would be in this case...I suspect open, anticlockwise, by quarter of a turn.. but in any event there are only 2 ways to choose.??!!
Later A114 engines had a changed ignition system and I think a Tillotson.?? carb'... although I am not familiar with this later type.
I stress that any adjustments, tuning, repairs should only be carried out if you feel able to bring them to a safe successful conclusion...if you are in any doubt at all you should consult a local garden machinery service agent...all should be familiar with your machine/engine.
Local Qualcast/Atco Service Agents can be found from
www.qualcast.co.uk or
www.atco.co.uk then Qualcast/Atco owners link then Service Agent search facility using your postcode. A local agent would be the best guide to spares availability and service info'.
Hope some of this helps..??
All the best,
Clive.
