With the next two weekends coming up being big fishing weekends it's a bad time for a motor issue but here's what's happening. I've got a 2015 Merc. 250 Pro XS 142 hrs. Hole shot has been a little sluggish lately but with temps here around 98 degrees i didn't think anything about it. but when I skinned it back it climbed to 5600 a felt like it was running out of gas so I back off to 5200 ran fine. I got in it again ran up to 5600 and ran fine slowed for boat wake got in it again and this time stumbled again. I'm thinking fuel filter but had that changed at 100 hrs. Mechanic says could be spark plugs, which were changed at 100 hrs also. I know there's bad gas and plugs go bad also and I've been told to change fuel line. Comments Please before I start changing parts. I can't wait for Mechanic ,He's two weeks behind!