Another update...

I conducted a Compression Test as per the instructions in the Gregory's Workshop Manual. I compared the feel of resistance to my other working mower, this engine felt slightly tighter, but this is just feel...

So I decided to rule out the carb once and for all... I started my running mower to confirm that it is running, then I swapped my carb with throttle attached and fuel tank, plus decompression valve to the running engine. Prime and pull, boom, it is purring like a wildcat. It idles perfectly in 3 throttle positions, no issues with carb, fuel tank, air intake/throttle or decompression valve.

It seems like an issue with the engine itself. I'm tempted to rule out the flywheel as I am getting a healthy spark, so what else should I check?

I'm at the point where this might be a bigger job than I can tackle, so I might reach out to my local (very good) mower shop for help.

I have another spare engine, on a rusted chassis, so I'll just have to make sure it runs, and I might just get it professionally serviced and swap it over to this chassis.

Any thoughts or suggestions guys?

Cheers,
GT

Last edited by greens_tuf; 22/02/17 09:02 PM.