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    Fuel setup two outboards, one tank.

    One separator is fine. You need a selector valve to keep the fuel line in use, from sucking air, from the other motor.
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    can someone point me in the right direction?

    Some motors never had a trim sender. Check the crowleymarine web site to see if your motor ever had one. BTW- trim senders are not all that accurate or reliable, which is what they should be. Replace the trim gauge with a water pressure gauge, which is much more important. Trim the boat by feel.
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    solenoids?

    Thye real question is does the trim work? If so, leave it alone. No one who knows the wiring of the solenoids will be fooled by it.
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    Mercury xr2 not turning over

    Your motor runs on a gasoline-oil mix. Some of the 2 cycle oil doesn't always burn. If you run the motor in a barrel, the water becomes an oily mess.
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    1979 Mercury 70 EL Thunderbolt Kill Switch Install

    That is the switchbox, look for a yellow/black wire. That will be the ign killer wire. It needs to ground to kill the ignition.
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    Prop Locking Question (Reverse Locking Cam?)

    Let's hope that the new gear oil fixes your shift issue. Otherwise, I fear the gearcase is bad. Inline 4 cylinder motors have a lower gear ratio than IL 6 cylinders motors. I think (not shared by all) that a 2" drop in pitch makes them compatible.
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    Non conventional issues.

    Gee, I don't believe it. My '93 Merc 135V6 has lost it's plugs for the airbox. I duct taped to seal it, however, I cannot believe it make any difference. I expect it keeps the water out of the carbs. if it got there somehow. However, the cowling does that real well. I think you are...
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    Four Winns hull strength

    Your hull should never crack. They can take a real pounding, and they do not leak much. Hulls are made to compliment the powerplant and real world conditions, and also, because the lawyers would get big settlements if they fail. It is real cheap to put another layer of glass or two, down...
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    Mercury xr2 not turning over

    Check the battery cables, their entire length, with your fingers. Look for corrosion under the insulation.
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    Non conventional issues.

    That is often called an airbox.
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    NO SPARK 1988 mercury 100HP outboard Sea Ray seville

    If your rectifier is shorted to ground, it can hinder the spark. You might disconnect the yellow wires from the rectifier and insulate them. Repeat the spark test.
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    Non conventional issues.

    When you say intake, do you mean crankcase cover or something else?
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    Prop Locking Question (Reverse Locking Cam?)

    The slinger should be installed over the driveshaft, on top of the waterpump housing. It is heavy rubber and will not move on it's own. Your driveshaft may have a groove for an oring, just below the spline. Some do, some don't. If you have the groove, install and oil an oring. Mercury's...
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    What is different about newer primer bulbs?

    My newish primer bulb seems to be full of a spongy plastic-like material, like a kitchen scrubber, which keeps the primer bulb expanded and helps the primer fill. Dog toys have it as well. I have not had an issue with that primer bulb on my Johnny 150hpv6.
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    Prop Locking Question (Reverse Locking Cam?)

    Inline 4 and 6 cylinder gearcases from the 70's and early 80's of the correct shaft length will fit your motor. Most of the shaft lengths were 20" on those motors. The gearcases had a locking tab, with a "donut" shaped nut that screwed into threads of the hub of the gearcase. By this point...
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    Prop Locking Question (Reverse Locking Cam?)

    If you get the gears shifting, you will want to set the gearcase to neutral and the control to neutral, for reassembly. In my mind that reverse lock is optional. Just don't quickly rev up the motor in reverse, and she will stay down, well enough. If you cannot get the gears to shift, you...
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    2002 225 Optimax - Overheating at idle only

    Idle temp control is managed by the thermostats. Starting at about 2000RPM the poppit valve controls the temp. Therefore, I would check the thermostats. If the 'stats check out, Mercury motors will overheat at idle, if the bottom part of the waterpump impeller is damaged a bit. They will...
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    Need Help Testing Rectifier Please

    A full wave rectifier is composed of 4 diodes wired in a bridge. The internet will give you a diagram. There are two connections to the stator wires and a connection to -12VDC and another connection to +12VDC. Mercury uses rectifiers that have the case ground connected to the -12VDC. Diodes...
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    Prop Locking Question (Reverse Locking Cam?)

    That cam is purely to lock the motor down in neutral and reverse. It is there to keep the motor from kicking up when you suddenly slow down or engage reverse. I would remove it until you get the gearcase straightened out. I would also pump in new gear lube before doing anything else...
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    Need Help Testing Rectifier Please

    That looks to be a voltage regulator. They are not as easy to test as a rectifier. Actually the test may be to measure the voltage at the battery under different RPMs.
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