Re: Mcculloch 4hp no start Home › Forum › Ask A Member › Mcculloch 4hp no start › Re: Mcculloch 4hp no start john8504Replies: 169Topics: 31 April 23, 2018 at 1:59 am #74559 Bright blue spark, trying priming with anything under the sun that burns and still nothing. It’s spitting out a lot of black from exhaust since I have the lower unit pulled off. About to throw this thing across the yard.