Revving on.

[10 inch Terror]

Yes I'll check the plug colour and check the cylinder gasket joint is sound. Could this explain the cutting out on tickover too? Thanks for your comments thus far.

[Adam_Winstone]

Choke plunger not seating correctly in the OFF position? This can cause it to run which at tickover when warm, which then prompts you to turn up tickover revs, however, this then becomes a case of it sometimes revving too high at times. Such a state results in variable tickover, ranging from too fast to stalling, depending on running temp, how much air/fuel is creeping through the choke, etc.

This may not be the cause but is fairly easy to check and rule out.

Best of luck finding the cause.

Adam

[10 inch Terror]

Good shout that Adam, I've had problems with the choke set up in the past. I'll look at that too.

[sydduckett]

Because if the gasket doesn't do its job you will have an air leak and as such a weak mixture. "Revving on" is a classic sympton of this.

sorry didn't explain myself. I meant first place to look. I guess it's the most obvious. think it's time to try the homemade air test kit.