That's about what i thought too, give me a bloody primer anyday, 1st pull starts everytime. Most other carbs atleast the butterfly is the right size and shape. I attacked the old one with the file to get the shape a bit better, i bent it back slightly at the air bleeds but might give filing that area a go this time. This is Huayi carb btw seems it was replaced with a Nikki later on which may not suffer this issue however i cant find any stock of the Nikki (Briggs Part No 595509)
