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    2000 Proline 195 sport with 2000 merc 125 fuel tank question

    The fuel sender usually uses black (ground) and pink for the sender wire. Do not connect +12VDC to the sender. Not sure what the green wire is. Green is usually trim down.
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    MAX HP

    You will want two fuel tanks, plus the ability (fuel valves and piping) to run 2 motors from either tank. You will want 2 sets of batteries, and the ability (batt switches and wiring) to start/run either motor or both from any battery set.
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    Does my engine have a problem? Or is this normal behavior?

    If it is a premix motor, the fuel mixture will get "oily" after some time in the tank. This will cause smoke and can cause some fouling of the spark plugs. Other than that, it sounds like it is out of tune. When were the carbs cleaned and adjusted? When were the spark plugs replaced...
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    MAX HP

    Your boat will likely be slower with the two motors.
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    Mercury 150 Black Max ~1992 year model

    Yes, The Poppit opens at a certain water pressure (about 2000RPM), causing most cooling water to bypass the thermostats. Thermostats must open for you to have a telltale, on that motor. Underway you should always have a telltale. if she doesn't overheat the poppit is likely fine. if you...
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    Merc runs on one tank and starves out at idle on the other tank

    The antisiphon valve could fail to open at low RPMs, but that would indicate a weak fuel pump. You can remove the A-S valve for testing.
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    Mercury 150 Black Max ~1992 year model

    It is likely 2:;1. Easy to tell, simply turn the flywheel 2 complete turns and see what the prop does. Replace the waterpump impeller, wearplate and 2 gaskets. Replace the pump cover if it has a scratch. Replace gear oil and check spark plugs for wear. it should have gapless sparkplugs. It...
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    Pontoon Dolphin fin or not??

    I do not know a lot about 'toons, but they do not really plane. A Dolphin will really hurt, IMO. What is your issue with the boat.?
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    No power to tilt and trim relays.

    Relays supply ground to the PTT motor when they are not energized. They supply +12VDC to the PTT motor when energized. So you must have a good ground on the relay's primary and secondary circuits for it to function properly. So, If you jumper the blue wire on the PTT motor with +12VDC and it...
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    wont trim up under load

    There are at least 3 different engine models or that year and HP. That unit is likely a single cylinder and can be power or mechanical. The mechanical version of the trim unit is powered by the accumulator. I would recommend to the OP that he match his unit up on the Crowleymarine site or...
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    Took boat to "marine mechanic" and now it's not drivable

    Gee, I thought mechanics loved carb rebuild jobs......easy money.
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    Power trim relay

    That PTT motor will usually have 3 wires (blue, green. black) a solenoid or maybe 2 solenoids, and no relays. Some had only one solenoid for up and the green wire for "Down trim" was wired directly to the PTT switch. So take a look at your PTT unit. See if it has one or two solenoids...
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    Merc runs on one tank and starves out at idle on the other tank

    You likely have a small air leak in the fuel line from the front tank, that is not common to the rear tank. At idle the air leak starves the engine for fuel. At high RPM, the pump can pump enough fuel, over the air leak. to cover it up.
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    No power to tilt and trim relays.

    What model motor? 60*V6 or 90*V6? So no power at the trim button on the cowling? On my '98 Johnny 60*V6, the power for the instruments, trim, starting etc., come from the same 20A fuse on the wire at the starter solenoid. If that fuse blows, no instruments work, the trim doesn't work and...
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    wont trim up under load

    You should move this post to the appropriate engine repair section. Some motors do not trim, but have tilt. Some have trim and tilt. What motor do you have?
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    Tower of Power Cold Start Questions

    Yes, fast idle lever all the way up. Be prepared to push it down if engine overspeeds. The starter will kick out whenever 1 cylinder fires. if your motor does this as often as you state, the engine is out of tune. it should only kick out the starter occasionally. Your starting procedure...
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    135 Black Max opinions?

    That motor is a good one, however, at it's age, a running one would be pretty cheap. I bought that same motor in 2008 for $1k. it runs super. 6 pistons and a bore of the cylinders would be nearly $1k.
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    1995 mariner 200 hp non efi lost spark

    The black/yellow sires will disconnect at the switchboxes. You will need to choke the motor to stop it, after disconnecting those wires.
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    Mercury 850 Outboard super high Idle

    IL4 motors changed to ADI ignition in 1976. The 1975 and earlier models had the distributor ignition.
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    1995 mariner 200 hp non efi lost spark

    Yes...
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