View Full Version : need a part#, rough idle please help

07-04-2012, 02:25 PM
i believe my boat may need a new idle air control valve. Its the 1999 LTR in a maristar 230. The boat idles kinda rough and if i give it any load when cold it just dies. it runs better one its warmed up a bit and doesn't have any problems up to the 5200 red line. Even when at temperature though it the idle is rough and surges some. I replaced the iac valve with one from o'riley part#31023, but i'm afraid maybe its not the correct mapping even though the part looks identical. Any suggestions or part numbers would help!

07-04-2012, 02:27 PM
could it be a pcv valve? does anyone have the auto part number for that? the nearest mc dealer is about an hour away from me and im hoping to fix it before the weekend

07-04-2012, 03:13 PM
Not sure of the number but you might read through this post if you haven't already it may help.


Good Luck