Hi all,

I was out on the boat for our Friday happy hour last night. when driving the boat, it felt like it was surging/ pulsing. Not sure if Im describing this well, but it was consistent push, then drop off. Not real prominent, but noticeable. The instruments readings for speed and RPM's are not changing. they are steady. but I can feel the boat pushing and letting off. was running around 17mph
New boat last year, 60 hrs. so far
Only using ethanol free fuel,
Winterized by dealer

Thoughts? bad fuel?, fuel filter? Fuel pump?