I found the problem! It was partially plugged injectors! hard fix took about 2 weeks for the dealer to figure it out! thanks for your help guys!

Hello all, I have found a fix. My marine dealer changed the plug and said that we wouldn’t even notice the plug during low rpms or idling we took it out on the lake drove great! 5600 rpms top speed of 41-42 but we were just checking our boat out and I was driving it around at 7 or so mph and we went to take off it bogged down and was doing the same crap 28-30 mph 4200 rpm I shut it off for a minute took off it ran fine
What’s the deal and suggestions?

I change oil(to much oil according to the dipstick) didnt do anything will try carbon thing. But someone at the landing suggested the fuel injectors
Could this be the problem new prop did not do anytjing(19 pitch)

thanks norge, going to try that right now!

Do you really think seafoam would work in a 27 gallon tank? (almost a full tank)

Thanks Guy, I am taking it to my marine tech next week. I was thinking how many rpms im off (1400-1600 rpms) could a prop change really do that much difference?

lundgeye.it has snap and gets on plane like normal but once on plane it seems like we are not gaining any power.

Glenn I am using tilt and trim

bought the boat on craigslist. first time on the water this year since I like in northern Wisconsin. Everything has worked fine on the boat except the motor. runs awesome at 28-30 mph but seems like theirs no more power their once you get going