18hp 2006 nissan 4 stroke blowing oil out the ventilation chamber

[fredfish]

hi . i have a 18hp 4 stroke 2006 nissan ,thats blowing oil out the ventilation chamber port. this has just started happening the last few times out . it only happens at full power. but when it does it really blows out. other than that the engine runs great. it starts right up and runs strong. i don't like to pollute the ocean or i would just run it that way. can someone out there help me with this problem.thanks fred

 

[pvanv]

Re: 18hp 2006 nissan 4 stroke blowing oil out the ventilation chamber

Is it overfilled with oil? Even a little? If not, then you probably have severe blowby, and likely need to tear it down for a ring job.

 

[intrepidvoyager]

Re: 18hp 2006 nissan 4 stroke blowing oil out the ventilation chamber

you could have crankcase ventilation issue which would account for oil loss thru pan seal at higher RPMs