I'm beginning to despair of ever getting my Malta O/B to run properly

My Seagull is very easy to pull indicating poor compression. However it starts and runs reliably.
I dont know what the compression is supposed to be on Seagulls but they are pretty small capacity. You~d not expect them to be difficult to pull.

A
 
Its funny you say that .... I've had 3 Seagulls and all were reasonably easy to turn flywheel by hand without cord ... but ran superb.

Dunno if same ... but with model engines we have various ... where some are quite easy to turn over but once started piston to cylinder 'closes' giving desired compression ... others with rings ... but others that have slight tapered bores and can be extremely hard to turn over as piston approaches TDC ... once started that 'opens' up ...

Have you ever managed to start one by hand without the cord. I've started my Featherweight without the cord 2 or 3 times
 
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