Ok so I was doing afew runs up and down my street and my moder was steeming. I turned it off and spit in the head and it took 20 seconds to boil away. I think it should take 10 - 15. I have my hsn at 3 1/2 turns out but no temp guage. So what could cause this alittle bit of after run oil on the head? I only had like a 1/2 tank through it.