Had this engine running almost fine had an issue where i could not increase engine speed... figured that one out had a mouse home under cowling cleaned up mouse house and had engine running pretty damn good... was leaking oil out of both valve covers so i removed them and cleaned them replaced gaskets and put them back on... it was late so i decided not to mess with it anymore.. went out next day and now she cranks but no spark i am like what the hell???? the only difference is i am using a starter pack instead of jumping from car this cant be making a difference can it???