200hp mercury clatter ????

[Chris St.Clair]

Just bought a 2001 Merc. 200hp caburated, saltwater motor. it's on a 23' Fishmaster. Motor runs great but after about 8.5 hrs it started to make clattering noise. It seams to be coming from the lower unit but it checked out fine. The shop says it is what's called deceleration knock. They say it is fairly common and act like it is no big deal but if it is indeed d/k, the article I found on it says that it is cauesd by the high speed jet being too lean and can be rectefied with a richer setting. It also sayed that if neglected it would damage the motor. Has anyone heard of this and can you shine some light on the matter.

 

[The Marine Doctor]

Re: 200hp mercury clatter ????

Did you not take the info I gave you to your local dealer?<br /><br />TMD

 

[Chris St.Clair]

Re: 200hp mercury clatter ????

TMD,<br />I gave the info. you gave me to the shop this mourning and they were thinking the same thing. He is goining to try and find the service bullitin 96-18 you mentioned. Thanks. Oh by the way you ask if I was still running breakin oil after 8hrs. Yes I am. I was told to do so for the 1st 10 hrs. Any thoughts you have on the subject are welcome. Thanks agin I'll keep you posted.