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Question

2000 bayliner
4.3 merc.
gm motor

Submitted: 445 days and 15 hours ago.

Category: Boat

Value: $15

Status: CLOSED

Posted by mastertechtim 445 days and 14 hours ago.

Answer

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

445 days and 14 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 445 days and 14 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.

445 days and 14 hours ago.

Reply

147hrs. fresh water, but a little salt

Posted by mastertechtim 445 days and 14 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?

445 days and 14 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.

Expert:	mastertechtim
Pos. Feedback:	100.0 %
Accepts:	30
Answered:	8/19/2008

Marine Mechanic

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

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Question

2000 bayliner 4.3 merc. gm motor

Answer

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

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

Answer

Reply

147hrs. fresh water, but a little salt

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?

Reply

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

Accepted Answer

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2000 bayliner
4.3 merc.
gm motor