I have a Victa with this engine. The mower is surging/hunting at all speeds. I have cleaned the carburettor many times, tried another carburettor, changed spark plug and fuel but nothing has helped. It is also a nuisance lining up all the gaskets etc with those bolts! Anyway, in my search for answers I saw one post somewhere that suggested valve clearances and another that timing belt may be the culprit. Easy, I thought. So I tried to get the valve cover off but couldn't. I believe they are throw away covers and are siliconed on without a gasket. Hence, hard to get off....very hard to get off.

Has anybody got any suggestions on how to get it off without wrecking it?