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OK, do you know anyone with a wood turning lathe? Any condenser from an O&R would work, if an early style one had failed in service it would have been replaced with the later one. I've used modern parts too; The rest of the pump is the same as the Comet, Orline, Petro etc with the small rotary vane type pump, the type with the rubber impeller that always seems to be knackered. Petro version shown below; David

I got the new pull start knob today and put it on and also fixed a crack in the ignition wire with Performix Liquid Electrical Tape,so no spark would arc from the wire to the metal.

This is the latest addition to my O&R collection, a Petro Powered Products Chug-A-Pump. The engine is an early compact I with the side mounted carb needle & screws in the back of the starter/blower cover. Unfortunately a previous owner disliked the starter mechanism so much that they cut it off completely. The engine was also seized & the flywheel nut threads were stripped, fortunately the crankshaft threads are OK. After removing the sparkplug I discovered someone had tried and failed to unseize it by hammering the piston with a rod, the piston has a hole in it. I left it overnight with some oil poured in the cylinder. Today I stripped it down further, I was surprized to find the flywheel key was steel, it does have a different part number to the later engines so may be original? The oil left in overnight did the job and I was able to turn the flywheel a bit, which enabled me to remove the cylinder without damaging the conrod. The cylinder is a bit rusty but hopefully it will clean up for reuse. The missing bits of the piston were shaken out of the crankcase. The gudgeon pin is also different to the later engines as it is solid, it is also smaller in diameter, I have a few spare pistons but they can't be used because of this. David