Boat question?

Picked up my first boat a lund wc-14 and a new yamaha 20HP four stroke.Took the boat out to break in the engine. The engine seemed to excelerate good from 0 to half throttle, but from half to full it did not. took engine back to supplier and they tested it and found nothing wrong. I listen to it run in there test tank and it did rev up from half to full throttle.I have not tried it on the the boat yet to see if it will perform on the water.Just looking to see if you guys have any comparible 14' alum 20HP boats Is this motor large enuff? Your suggestion would be appreciated.Thanks

Could have someting to to do with the very cold water passing through the engine ?? see what happens when it warms up 10 degree's

Your boat + motor are an excellent pair.

those 4 strks particularly the tillers all seem to have a hiccup till they are broken in , my tiller 50 last year
missed a beat when you accelerated quickly ,
the dealer said that thats 4 strk . They apparently are no screaming hell in cold water...There is akit to put on them to make them cold water compliant ...

Thanks for the imput. Have you guys herd why the don't like cold water? I was wondering If it had to do with the electric choke.

Make sure the vent is open on the gas tank if it's a portable.