I’m considering buying a boat with a 2002 optimax 225. I was told it was a little cold natured. When we test ran it it took a few times of starting and restarting to get it to finally set and idle good. We let it run a few minutes and went to take off and with the throttle lever all the way down the front of the boat would only come out of the water about halfway. Finally after 15-20 of this it finally kicked in and shot out like a rocket and never missed a lick for probably 10 min of running. We shut it off and let it sit for about 10 min then started it back up with no idle issues but went to take off and it did the same thing again. Is this too much of a risk to buy or sound like something simple?