New Motor Rough Idle

jcalder3

Cadet
Joined
Apr 16, 2012
Messages
9
Hello,
I took my SeaDoo Islandia 240 Mercury out for the first time after the rebuild. It seemed to run rough at idle (a lot of "thumping'). I did bypass the oil injection and running a 25:1 ratio for the break-in period. Without the oil injection, it gets this string dose at idle instead of using less oil. Could this cause a rough idle?
Thank you.
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,938
Re: New Motor Rough Idle

Yep... also run the Mercury Precision or Quicksilver Premium Plus oils. Also did you have the injectors and ECU tested|?
 
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