I’ve asked about this engine before but the suggested fixes didn’t work. I bought a used mower primarily for the deck and transmission but it did come with an engine that started and ran, but it has a random intermittent deep sputter. People suggested it was a fuel supply issue because it seemed to happen more under load, but I’ve replaced the fuel line and swapped in a good carb I scavenged from a running engine that grenaded and replaced the fuel pump and vacuum line and it still does it. It will even do it occasionally when just sitting still not under load, but just for a couple of seconds.
One thing I did notice today was a bunch of exhaust coming out of the area around the exhaust manifold gasket (or maybe the head) on the same cylinder as the fuel pump vacuum tube. Could a blown head gasket cause an intermittent loss of power?
One thing I did notice today was a bunch of exhaust coming out of the area around the exhaust manifold gasket (or maybe the head) on the same cylinder as the fuel pump vacuum tube. Could a blown head gasket cause an intermittent loss of power?