JustAnswer > Boat
Ask A Question|Register|Login|Help
JustAnswer

Boat

Ask a Boat Question, Get an Answer ASAP!

Have your own Boat question?

Marine Mechanics are Online Now
characters left:
Not a Boat Question?

Related Boat Topics:

  • Low
  • ,
  • Oil
  • ,
  • Head
  • ,
  • Heat
  • ,
  • Line
  • ,
  • Leak
  • ,
  • Merc
  • ,
  • Runs
  • ,
  • Time
  • ,
  • Hours
Bookmark and Share

Question

2000 bayliner
4.3 merc.
gm motor

Submitted: 461 days and 11 hours ago.
Category: Boat
Value: $15
Status: CLOSED
+
Read More
Posted by mastertechtim 461 days and 11 hours ago.

Answer

unsure of your question, can you elaborate as much as possible so i can better help you.

461 days and 10 hours ago.

Reply

it seems to come from the from the pvc valves, with white grease material. also the oil is coffee with heavy cream color. motor runs great but at times has no power and spits and putters but idles ok

Posted by mastertechtim 461 days and 10 hours ago.

Answer

there are a couple reasons for this to happen. most common would be a leaking exhasut manifold or heat riser. next in line would be a head gasket or intake manifold gasket leak. how many hours on engine? salt water or fresh water? rule of thumb is seven years then its time to replace manifolds and risers.

461 days and 10 hours ago.

Reply

147hrs. fresh water, but a little salt

Posted by mastertechtim 461 days and 10 hours ago.

Answer

thats still pretty new. you definitely need to find out how its getting in there before engine failure results. first step would be to remove manifolds and risers and have them checked for leaks, thats the most logical place for the leak. has the engine been overheated before at any time?

461 days and 10 hours ago.

Reply

just bought the boat. what is the best next step.

Accepted Answer

well unfortunately you may have a case of a previously overheated engine causing the head gaskets to blow. especially with such low hours it would seem that this would be the case, but in any event the manifolds and risers will need to be checked for cracks also. there is no easy way to tell you this but you are going to have to take engine apart until you find the source of the leak which will most likely include disassembling manifolds and probably removing cylinder heads.

Picture
Expert: mastertechtim
Pos. Feedback: 100.0 %
Accepts: 
Answered: 8/19/2008

Marine Mechanic

A.S.E. Certified Master Technician. 18 Yrs Auto Tech. 2 Yrs Marine Tech.

+
Read More

Related Boat Questions

  • i have a 1989 glastron , mercruiser alpha 1 , just installe...
  • i have a 1980 75hp johnson outboard and it runs out good and
  • I have a mercruiser 888 with an engine s/n of 4171420; it is
  • 1999 0r 1998 ficht 150 hp just blew a piston. any idea why
  • I have a project that will take more than just one anwser.
  • I have a 4 stroke merc 90 that will only idle on 3 cyls. and
  • I have a 18 ft tri hull fishing boat which is equipped with
  • i have a 2000 merc 4 stroke 90 that idles on 3 cyl and falls



Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.
Question List | Become an Expert | Terms of Service | Security & Privacy | About Us
© 2003-2009 JustAnswer Corp.