Recent content by wcmaness

  1. W

    150 XR2 Black Max Control Box (1985)

    Any idea how I can find out which replacement control box to buy? Mine is getting really loose & hard to use, and I can't find anything to suggest what will work. If I know the pin count, can I just buy a new one off Amazon with the same count? Is it that simple?
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    Reading Timing Label

    Stupid question I know - but which side of the timing label/sticker on the flywheel is BTDC and ATDC. Looking at the label, the numbers go right & left off of zero in the center (30 20 10 0 10 20 30). Do I use numbers on the right of zero for ATDC? or is ATDC to the left of zero?
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    Tilt & Trim bind/stop issue

    I replaced the pump a couple years ago on my T/T, and all was well. However, lately my motor will tilt down easily until it hits those 2 piston rods jutting out at the base of the T/T. Then is labors hard to compress those to get down all the way. If I don't take it in 2 secong stages, the...
  4. W

    One low compression cylinder

    I have one - out of six - cylinders with low compression. The other 5 are at 100, with the 6th at 30. The piston wall shows some scarring, and the piston is not burned or busted, so I'm assuming it's the rings & scarring causing the low compression. My question is this: what problems will I...
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    Oil Injection Warning Module - Green Wire

    I've re-installed the oil injection system on my 1985 Mercury 150 XR2 Black Max. It works fine, and I've had no issues with it. However, I've not been able to hook up the Warning Module. The problem is that my Clymer manual does not indicate where all the wires go. Apart from the obvious...
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    Coincidence? Water Impeller & Switchbox

    My engine is a 1985 Mercury BlackMax XR2 150. I had an unexpected failure last week at the lake. I replaced the impeller about a year ago, and it's been running fine. Dropped it in the water for a run, took a couple laps and stopped. Then I started it up, ran it wide open, and then it...
  7. W

    Tilt Damper Sticks

    When I lower my motor (1985 150 Black Max XR2) from trailering position, at the point it touches the twin dampers, it stops & bogs down. I am assuming the dampers are sticking in place. after a moment or two, I can lower it further a bit, then wait, then further, etc. Why are the sticking and...
  8. W

    Overheating for no reason?

    Ok - there must be a reason, but I haven't found it. A couple years ago I spun the hub on my 1985 XR2 Black Max 150, and she overheated. Melted a few wires. I changed the T-state, and the water hoses, and the impeller for the water pump. I even installed a new oil pump to be safe. Started...
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    Oil Injection Pump Test - hot motor

    I have a 1985 Mercury Black Max XR2 150 HP with oil injection. I suspect my oil pump is failing, but don't know how to test it. My upper reservoir is full. I disconnected the hose feeding the fuel line from the oil pump, and turned the engine over several times, but didn't see much oil...
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    Normal Temp

    I have a 1985 Mercury XR2 150. I just changed the water pump impeller, and at the same time decided to hook up the temperature gauge that's been disconnected for years. I noticed that the guage goes up to about 1/4 past the 1/2 way mark when running. There are not temp numbers on the guage...
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