Try Try AGAIN...... :(
Have a Sears Lawn Tractor Model LT2000 with a Briggs & Stratton 18.5 HP with a Nikki carb that is 'drivin me nutts" Had carb problems so I bought a Sears carb kit with all gaskets and jets and also new oil filter, air filters and 'anti-knock' shutoff plunger. Original problem of starting right up BUT then fast speed to slow idle then fast speed then slow idle, etc all within a few seconds of each other, plus puking oil out the exhaust pipe like really fast and tremendous smoke. NOW I opened the oil filler cap to fill the oil slump and I get 'puffs' of air/oil coming from the fill pipe and with the spark plug out, I put my finger over the plug hole and get great pressure then sucked my finger towards the hole..afraid to start it now, I don't want to have to pressure wash the wall that it covered with oil.
PLEASE, any thoughts on this? Is the air from the oil filler while cranking normal? or///