Hello. I have a 2013 Yamaha 40 tiller on a 16 foot Xpress. Back in March I was fishing in the river. I left the spot I was fishing and started up River to another location. My motor started cutting back at full throttle. It cleared up and I ran back to the landing with no other issues. I came home and serviced my motor. ( oil change, changed foot oil, new fuel filter and new spark plugs). I then went to the lake several times and everything ran fine until a week or 2 ago. My engine starts and runs fine when I first get to the lake. We stop and swim or fish for awhile and when I take off my engine cuts back and bogs at full throttle. I have ran a can of seafoam through the last tank of gas (ethanol free) and it still won't plane out. I pump the bulb and nothing changes. I've checked all of my fuel lines and nothing appears to be dry rotted or cracked. I have tired a new fuel tank and fuel line from the tank to the motor and it's still cutting back. What could be my problem? Thanks
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