Thanks for the inputs.

- I think the plug is good, but I will check the color and condition, as well as the "glow", I have another so if in doubt i'll probably replace it although I don't think that's my issue.
- The fuel could be old, so I will drain it out
- Before I add more fuel, I will remove and disconnect all the vents and fuel lines and check the tank for leaks maybe with soapy water (?), probably will replace all the hoses if tank is good. Either because it was very cold or due to a leak or both, I did notice it priming very slowly. I would assume my issue is an air leak somewhere in there.
- I should add the fuel filter back that I removed some time ago, and I might add the air filter off my OS46 (if it fits) .. i do live in a dusty area.
- Then I'll try my best at checking for leaks in the engine with straw as explained ..
- Then I'll go to 2.5 full turns from closed on the HS valvle and give it a go. I'll leave idle alone for now as it used to idle good, I've read to adjust that only after your HS is set.

Many thanks