| Author |
Message |
    
mark hughes
New member
Username: imfshn4fun
Post Number: 1
Registered: 07-2009
| | Posted on Saturday, July 04, 2009 - 07:42 pm: | 
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I bought a bayliner last summer and it has a volvo AQ125b engine and I need to know if someone can tell me how I can tell if my engine is circulating water through like it suppose to. |
El Pescador
Senior Member
Username: el_pescador
Post Number: 4597
Registered: 02-2006
| | Posted on Saturday, July 04, 2009 - 08:22 pm: |
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Basically, indications of good water circulation are the engine coolant temperature staying between 180º-198ºF and you should be able to touch the exhaust manifold or the exhaust pipe without burning your hand. Also, the copper pipes attached to the raw water pump should feel cool when you touch them with your hand.
Now, if you want to verify that your raw water pump is primed, you can open the drain at the bottom of the exhaust manifold (if installed) and see a continuous flow of water coming through it. You can also loosen the copper pipe under the exhaust manifold for that purpose.
Are you experiencing problems? |
Rob Kitchen
New member
Username: ojo
Post Number: 1
Registered: 07-2009
| | Posted on Monday, July 06, 2009 - 10:14 am: |
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Hi asking for a friend, he has a 1982 AQ 125 in a Bayliner,it started working bad so we did a troubleshoot and found one dead cylinder it had zero compression,3rd cyl from the front.We pulled the head and found half of the valve missing. What concerns us is that the 4th cylinder has had the exhaust port burnt bad.There is hardly and surface left on it for the gasket to seal. Any suggestions,this is apparently a result of the gasket not being changed enough.Besides replacing the head,can we fill it in with JB Weld or get it welded ? |
El Pescador
Senior Member
Username: el_pescador
Post Number: 4607
Registered: 02-2006
| | Posted on Monday, July 06, 2009 - 02:08 pm: |
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Rob, please start a new thread whenever you post a new topic.
Regarding your question, you can either get the head TIG welded or mill the port and install a steel insert. This problem is typical of these engines with aluminum heads, as #4 port stays more in contact with salt water that the other ports. |
Robert A. Fierro
Advanced Member
Username: sandkicker
Post Number: 667
Registered: 06-2008
| | Posted on Monday, July 06, 2009 - 02:17 pm: |
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Rob. Further "El's" response: head gaskets do not require routine/periodic replacement. Failure as reported, more likely indicative of the exhaust elbow not being replaced before it fails. |
