16 to 1 There is a universal synthetic oil that works well for most all 2 cycle engines and causes less problems than standard 2 cycle oil. Also try rec 90 or rec 89 gasoline it contains no alcohol and will stay stable longer.
sounds like the needle and seat need to be replaced. the carburetor is flooding out and running in the oil. after you replace the needle and seat i would recommend changing the oil.
Always use unleaded gasoline with a pump octane rating of 86 or higher. Never use old, stale, or contaminated gasoline, and do not use an oil/gas mixture. Do not allow dirt or water into the fuel tank.
hi stephen
there is no parts number for the primer bulb
here is a link to your primer bulb
i shall also send you a link to the carb kit for your carb as well
i am the only person in the world that sells the original carb kit i had it developed for me when i worked for technotronic industries
there is one cheaper one out there but it is to fit a zama carb and not a ruixing carb
here is the link to the primer bulb
https://www.ebay.co.uk/itm/323510647106
here is the link to the carb kit
https://www.ebay.co.uk/itm/223393359179