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jsamaroo 07-13-2009 05:14 PM
Blue smoke from exhaust
 
My 98 shabah 202 blows blue smoke from the exhaust when I am at low speeds. Any ideas on what this is?

WetWilly 07-14-2009 11:48 AM
Re: Blue smoke from exhaust
 

Hi jsamaroo, blue smoke normally indicates burning oil, black smoke indicates too much fuel and for land vehicles, white smoke indicates water in the exhaust system (doesn't work for our boats, because there is supposed to be water in our exhaust all the times).

You can check your spark plugs to see which cylinder is using oil.

WetWilly

jsamaroo 07-14-2009 01:42 PM
Re: Blue smoke from exhaust
 
If a cylinder is using oil, what do i need to do, change the head casket? Thanks.

Z 202 07-14-2009 07:58 PM
Re: Blue smoke from exhaust
 
The most likely candidates are worn piston rings or worn valve guides.

How many hours on your engine?

jsamaroo 07-14-2009 08:00 PM
Re: Blue smoke from exhaust
 
The engine only has like 235 hours on it.

SEMIJim 07-15-2009 04:38 AM
Re: Blue smoke from exhaust
 
Quote:
Originally Posted by Z 202 (Post 16636)
The most likely candidates are worn piston rings or worn valve guides.
I hesitated to comment, esp. as my comments would've constituted bad news, but I fear Z 202 is probably right :(.

Jim

300sflyer 07-15-2009 03:56 PM
Re: Blue smoke from exhaust
 
Quote:
Originally Posted by jsamaroo (Post 16638)
The engine only has like 235 hours on it.
That seems like very low hours for an engine to be burning oil already.

As Wet Willy suggested, pull your spark plugs one at a time, to see if any are fouled up with oil. Does the level of oil seem to be dropping the more the engine is running? What oil are you using?


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