I have a 97 Larson Sei 206 with a 5.7 mercruiser I/O.. I just had the carb rebuilt and only taken it out once this past weekend... well let me start from the start... 2 weeks ago i went to get the boat running and cleaned for the holiday weekend, so i stuck the muffs on the lower unit and started it.. it started up just fine (well i had to pump the throttle a couple times but it started right up) so i thought it was in tip top shape.. I took it out to the lake thinking that no B.S. was going to ruin my weekend, WRONG!! i put the boat in the water cranked it up and it started like it did at the house.. so I thought no problems, well after i ran it up and down the lake a few times i cut it off to sit and hang out with some friends i met up with, then sat for about 20-30 mins tried to start it up, it wouldnt start.. I opened the hatch thinking it was the fume sensor and ran my blowers and still wouldnt start.. i kept pumping the throttle and it finally acted like it was going start, but still kept cranking, then about after 3 mins it finally started.. well i thought maybe it was the sensor.. so i did the same ran it up and down the lake a few more times with no problem.. then when i had it running about 4500 rpms it cut in and out like it was going to die.. so i thought "****!" this isnt good.. so i kept it hammered down it did it again.. so i backed off a little bit.. it didnt do it but after i cut it off and tried to start it same thing, took about 3 mins with the hatch open to start.. What can be my problem??? the guy who worked on my carb said he turned my idle down a little.. could this be it?? because last year i didnt have one problem starting.. PLEASE HELP!! it would be highly appreciated, anything you know will help
