My 2015 Primavera 150 has recently began to sputter a soft spitting out the exhaust when I come off the throttle to slow or stop. I replaced the plug to no avail. I call my local dealer (75 miles away) and asked about the issue. His reply was that's normal. Bull, it's been normal not to do that until recent. 4,800 miles on her Fuel is always high octane. If there someone on here, (My first post here) that has seen this issue, I'd appreciate their knowledge. It runs great, just spits like camel. .
Yep, it seems unwanted air can get into the exhaust and be a source of pipe sputter, but my system has no holes or rust, pipe is tight against the header and I hear no exhaust leakage, even ran water across it while running and seen no sign of air issues. I'm still checking out things, I don't feel it's fuel pump, not a weak spark plug as I put a high spark efficent plug in. I may do a compression check to see if there is a issue with the exhaust valve. I'm still on it, ug.
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