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  1. C

    Hot on one side cool on other

    I would check torque on head bolts, to make sure they are tight, after you installed new head gaskets.
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    Mercruiser 3.0L mercarb 2 barrel Help!!!

    You should repost this in the MerCruiser forum, along with year of motor. It also sounds like you bought a new carb, versus having your's rebuilt. Typical carbs have a idle speed screw and one idle mixture screw, for each barrel.
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    Bennet trim tab goes down, not up, regardless of up/down button

    Bennett trim tabs are usually spring loaded. That is, when moving down they are under hydraulic pressure. When moving up, the fluid is withdrawn from the actuator and spring pressure causes them to come up. So unless the seals leak, there will not be fluid on both sides of the piston.
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    Waterlogged keel

    I had an 18 foot SeaRay bowrider. The "keel" consisted of a piece of 3/4" plywood, laid on it's end and scribed to match the hull. it was stapled to the deck, with steel staples, which failed due to rust. This "keel" was only under the ski well. What do you have? I replaced it with a piece...
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    Which resin to finish floor?

    Just sand and wipe the existing fiberglass with acetone, and you can use whatever resin you want to finish the deck. Make sure to use enough glass matting or cloth (I like mat) to give the plywood decking protection from the elements after a beating from shoes and feet.
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    Electrical question

    The two in the top of the photo have reset buttons. They are (actually were) circuit breakers. The bottom one may also be a circuit breaker, like ones used in cars years ago. They reset when they cool off from an overload. They obviously need to be trashed.
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    115 mercury driveshaft stuck

    Have you priced a new gearcase from SEI versus the parts for a rebuild? You may find them similar.
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    Hot on one side cool on other

    You might tell us year and HP of motor. Sometimes compression leak causes overheat.
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    89’ Mercruiser 454 7.4L Big Block Backfire issue

    This should be reposted in the MerCruiser forum. When you say muffler you mean exhaust manifold and/or riser, right? Normally they are replaced when necessary. Those would have been replaced in 1998 in saltwater, and could still be good if used exclusively in freshwater.
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    I've got (I think) a 71 Merc outboard

    Gee, motors do come off of boats....... Especially if you have restoration work to do.
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    Stand-alone tilt/trim pump

    yes on all points. The original control panel had a separate trailer button. I guess your trim limit switch was bypassed over the years, allowing the use of 2 buttons. That's fine. I wouldn't worry about the oring material. They were likely rubber in the 80's and lasted 40 years. The...
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    1994 mercury mercruiser engine not starting

    Remove spark plugs and distributor cap. Turn engine over with wrench and put finger on #1 spark plug hole. Feel for compression, and observe distributor rotor turning. As piston nears top of cylinder and compression increases, distributor rotor should be pointing at #1 spark plug "post" on...
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    85 merc 200 black max overheat alert

    A lot of those motors have a terminal block where the wire from the motor sensor and the wire to the control meet. Make sure it is not grounded there.
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    How to hook up my fuel line to gas tank

    Tommy, the fitting you need looks to be in the center picture. it is already wrapped with teflon tape. So, if the hose barb on your tank unscrews, see if the fitting with the teflon tape will screw in.
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    Stand-alone tilt/trim pump

    Turn the knurled knob full CCW, with the motor down. Now fill the pump reservoir, as Alumarine described. Now see if she will trim up. On those older motors, with the original PTT control panel, you need to push 2 buttons at the same time for tilt to work. On the bottom of the PTT...
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    1994 mercury mercruiser engine not starting

    You are sure she is firing on the compression stroke?
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    Vintage Mercruiser Tach Pole Question

    Looks like a 3 wire tachometer. Also looks pretty crusty. Does it work, and why do you want such an old one?
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    85 merc 200 black max overheat alert

    Poppit (single) was replaced with correct kit, right? If wiring to overheat sensor is bad, it will alarm when motor is completely cool, as sensor simply grounds circuit to sound alarm..
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    Vintage Mercruiser Tach Pole Question

    I cannot tell from the picture, but it doesn't look like a newer style tach. How many connection does it have?
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    U-Joints for 2003 Alpha One Gen 2

    So, we are in violent agreement, that the auto u joints run OK, even though they are different?
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