2000 ec 300 carburation

[Jonnoyoung]

Hi there I've got an ec300 and I'm struggling with it the carburation is all over I've played with jet sizes main and pilot and I cant stop it from over running when you back off the throttle even with a huge pilot jet it still does it do you think it could be the crankshaft seals? Any help would be grateful..

 

[Zman]

Yes I would check the crank seals.

 

[(F5)]

Try spraying engine start or brake clean around reedblock area while idling. Any leak there should result in higher revs with spray.