Hi Nathan,

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I would just chuck another power torque back on there
that's an idea but where to source it from. Also, experience from the dead engine which I took great care of and still seized on me, I probably want to go the more reliable route for a longer lasting mower.

Hi Grumpy,

Thanks for welcoming me here. I appreciate your very informative reply and you don't sound grumpy at all grin
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You haven't told us why you are considering changing from a, to put it politely, colloquial 2 stroke, to a global 4 stroke
That's because I really don't know much about mowers and engines. You certainly have opened up this empty can a bit..

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we will need to know more about your requirements and expectations
You're quite right. I suppose my aim is to put a good, new engine that's going to last me years, easy to start, smooth, powerful and not too fiddly to install. So, going on your advice, maybe a 4 stroke Honda OHV/OHC depending on fitment and price.