Recent content by JimDD

  1. J

    1984 Mercury V-6 150HP Poppet Valve

    I believe I will have to rebuild the original surface with JB and rebuild the original design with the two round members as originally installed. Thanks, and take care Dukedog!
  2. J

    1984 Mercury V-6 150HP Poppet Valve

    I have an antique 1984 Mercury V-6 that has its overheat alarm come on at around 3000 rpm. Water pump is less than two years old and at idle water gauge ~3-5 psi, higher rpms pressure runs 15 psi +. I have maintained this engine myself for the past years since I bought it new in '84. I had...
  3. J

    150 Merc Bogs Down

    I have a 1984 Merc 150 V6. I have recently been experiencing poor idle at higher trim positions used when I fish shallow water. Also, when coming on the trailer and driving on, I usually trim to the top of the trim mode to keep from damaging my prop when driving the boat onto the trailer. I...
  4. J

    1984 150 Merc Water Flow Schematic

    My manual lacks details on the options for the water flow from the backside at the thermostats and other water connections on my motor. I have the #2 design poppet valve which lacks the hose that goes to the rear. Is there by chance a site that would have this information? I looked around...
  5. J

    1984 Merc 150 V-6 Overheat

    I recently spent a good bit on some work done by a local marine dealer. It was work to remedy an overheat situation that I had. The dealer ended up putting a new water pump, new overheat sensor, and had to bead blast some foulant in the heads on the water side. There was a bad gasket in the...
  6. J

    Overheat Horn on a 1984 150 V6 Merc

    I had previously demoed my oil injection system because of nuisance alarms with it. By doing this I also had demoed the overheat horn circuit which was in the wiring harness for the oil injection alarm module. I recently retired and wanted to reestablish some reliability (confidence) on the...
  7. J

    Wiring a 1984 150 Merc V-6 Temp Gauge

    In the past 3 years, I disabled my oil injection for this motor due to recurring nuisance alarms, and began mixing my own oil in the gas tank. I installed a water pressure gauge and it is working fine as far as alerting me to water pressure problems. Problem is that when I demoed the oil...
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