I have a 2000 Johnson 225 J225HGLSSC that will start right up cold, will run great to the first fishing spot, but after fishing for a while it will start but when I attempt to get it up on plane or even give it a little gas it will stutter and stall. If I push in on the key it will catch and then run fine again. Happens just about every time. Any ideas on how to correct this issue? Thanks.