I've been having idle problems for the last two seasons. I've had two reputable marinas try to fix it but they have not been successful. They've of course changed plugs, a couple of coils, fuel filters, ultrasonically (supposedly) cleaned the fuel injectors, all the easy stuff. It sets no alarm codes. It still stumbles intermittently at anything less than 1000 rpm and dies. It will then start right back up and runs fine at higher rpm. I've scoured these forums looking for the solution and it seems the tracker valve may be questionable. The motor only has 254 hours on it so I can't imagine it has any damaged reeds. Any help will be greatly appreciated!!! Thanks in advance!