MF, it is a 17cc motor same as an 80s mcculloch. Not sure if its a ryan motor but same configuration with orange choke knob at back

This is what its like https://www.gumtree.com.au/s-ad/wan...per-ryobi-vintage-suit-repair/1261131990

Update on the Tanaka:

Tested condensor found fine.

Filed points - desperately needed doing. Re oiled felt lubricator and set gap at 14 thou.

All back together and still doing the same thing.

Then I took my own advice and put back in an old champion j19lm instead of the new cj8 that was in there.

The plug was the main problem!

Then the fuel pump died. Turned out the original fuel filter didn't have a 1 way valve like I thought, it was degraded internally and clogged the pump.

Cleaned that out and took it for a 15 minute run and didn't miss a beat