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  1. Lou C

    Proper way to place engine compartment/bilge fans?

    Here's the official word from Chapman's....I have mine set up that way because I have vents that are directional and I have one facing forward (fresh air intake) and the other facing rearward (connected to the blower). I also installed a gas fume vapor detector to make me aware of a leak if it...
  2. Lou C

    Mercruiser 6.2L Coolant Loss

    the engine with the leak seems to have a residue of something near the hose connection for the exhaust manifold on right hand side in the pic....maybe a clue?
  3. Lou C

    Merc 4.3

    The intake issue applies only to the later Vortec engines not the older pre Vortec ones like my 1988. I think they increased the size of the water passage to offset the lack of the exhaust crossover that the pre Vortecs had. So one more drain plug. Durability wise they are very good; my short...
  4. Lou C

    Merc 4.3

    Agreed and when I was paying $6.00 a gallon this summer it was nice to have 2 less cyls to feed. The 4.3 & Quadrajet combination is very economical because of the small primaries. In my boating area I can rarely go faster than 30 mph anyway. However I wouldn’t be against a 5.7 upgrade when I...
  5. Lou C

    Merc 4.3

    I think dubs was being facetious lol. Sometimes humor is lost in posting!
  6. Lou C

    What was Causing this Clunking Sound? Binding Brakes?

    That diagram shows how to manually apply the brakes if that’s the Dexter version of the Tie Down actuator (I have the same one). Free backing drum brakes (if that’s what you have) are not self adjusting, they are adjusted via a star wheel in the backing plate. It’s possible they are set too...
  7. Lou C

    Continental Trailer Leaf Spring to Torsion Axle Conversion

    I don’t understand the preference for torsion axles especially on tandem trailers. Keep in mind that: Torsion axles do not load share between the axles as spring axles do with an equalizer; it is not unusual for one axle to be overloaded on a torsion trailer on bumps and if the trailer isn’t...
  8. Lou C

    New 5.7 overheating

    I think nearly all V/P engines used a 160 stat with the exception of the 454s which seemed to use a 140. Even so the exhaust temps with the 160 will not be high if all is well because the exhaust should be getting full flow when the engine is cold, then when the stat opens, the warm water from...
  9. Lou C

    New 5.7 overheating

    Are you sure both ports in the thermostat housing are open? I have the same exhaust on my OMC Cobra and they run at approx 100* at idle and the most they get to is 135* after coming off plane. The starboard side tends to be a little warmer. 160 at idle is way hotter than normal.
  10. Lou C

    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    Yes the coolant side is probably like 15 psi raw water side is low pressure
  11. Lou C

    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    They are like radiators and corrosion can happen on the raw water side. If you can find a way to plug the input & output of the closed side you could use a radiator tester to see if it holds pressure. But then you have to drain the whole system etc. Maybe better idea, can you have antifreeze...
  12. Lou C

    Merc 4.3

    People have to remember an I/O is a slightly modified automotive engine & for marine use you have to deal with the differences/issues inherent in that. As in: Not self draining you must winterize Water cooled exhaust you must replace when needed Single speed transmission you have to make sure...
  13. Lou C

    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    But there was a leak as I pointed out on the exhaust manifold H/Es can be pressure tested that info would be in the “super top secret dealer only shop manual”.
  14. Lou C

    Merc 4.3

    Well if you try to save money & buy a 15 year old boat that was neglected…not maintained not winterized etc then yes… If maintained they can easily last 30 years or more.
  15. Lou C

    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    Well I’d head over to a dealer and after buying some maintenance parts see if they’ll share the super secret Volvo procedure with you lol. I used to buy parts for my OMC from my mechanics (since retired) instead of on line because: Wanted to give local guys the business They were nice about...
  16. Lou C

    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    VP Shop manual?
  17. Lou C

    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    I’m thinking that Volvo must have a procedure on how to fill the full closed cooling system if you are installing a new engine let’s say so as to avoid air pockets. That can definitely cause hot spots
  18. Lou C

    2012 VP 300 C-A Exhaust manifolds getting too hot - DTC 441 & 442

    If you can try getting one of those Lisle radiator funnels they work well for that purpose. Seeing as how the manifolds are antifreeze cooled (correct?) and the design has that tall section there appears to be places for air to collect if there was a small leak.And, the top of the manifold is...
  19. Lou C

    Exhaust Bellow

    Nope not at all. Might just add a bit of noise
  20. Lou C

    Merc 350 mag mpi HELP! 200°

    Super hot meaning how hot? How hot is it where the rubber hose fits on? And you should take readings right after the boat comes off plane that will be the hottest it gets (usually). Idling is not a test esp if on the water hose/muffs not in the water. Remember it is the rubber exhaust hoses you...
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