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    Won't throttle past 3000 after it warms up

    No idea on your specific engine, but EFI motors control the fuel mixture by engine temp, among other sensors. Maybe your temp sensor is bad? Is the motor in some sort of safe mode? That could indicate some sort of bad overheat sensor.
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    1996 Evinrude V6 150 (60 deg) Looper Problems

    If you sanded the carb bowls, and took off a bit too much material, the idle fuel pickup could hit the bottom of the bowl. That could clog it. When I rebuilt my carbs two years ago, I ordered aftermarket carb kits. The gaskets looked fine, until I matched them with the originals. They were...
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    2005 115 Johnson PLSOR dies off idle

    Floats adjusted too high can cause carb to flood, especially when you come off throttle. How does it accelerate? Do you have the main jets installed in the new carb bowls?
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    New starter, new battery, still just clicks when key is turned. 1990 3.0 mercrusier.

    Some MerCruisers have a slave solenoid on the block. The ign key start circuit energizes the slave solenoid. The slave solenoid then energizes the solenoid on the starter, causing the starter to spin and engage the flywheel. Not sure if your 3.0L motor has a slave solenoid, but my 4.3L...
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    1996 Evinrude V6 150 (60 deg) Looper Problems

    SusieQ, It sounds like you have done all the right stuff. Not sure what to add. Spark plugs should be Champion QL78YC. Non-Q suppressors can interfere with ignition system. Is the shift cut-out switch working? You might disconnect it and see if that helps. I would set the idle mixtures to 5...
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    Solving inaccurate tachs?

    So your tach and fuel gauge have issues? Sounds like the power and/or ground connections to them need to be cleaned.
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    1998 Johnson 90HP (J90TSLECM) voltage too high!!!

    Rectifiers do not limit current, at least your rectifier will not limit the 6A max charging rate. Therefore, I do not think a new one will help the issue. Of course, when installing it, you may inadvertently clean the connections, which can help. If you really want to limit the current, and...
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    1998 Johnson 90HP (J90TSLECM) voltage too high!!!

    It appears that your motor has an unregulated charging system consisting of a stator and recifier. The battery is supposed to act as a load, regulating it to some extent. Yours seems to be overcharging. Clean up all your electrical connections and keep an eye on the water level in the...
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    2004 mecury 115hp saltwater engine fly not turning all the way

    If the flywheel will not turn, with the spark plugs removed and the gearcase removed, you have serious engine issues. If it is not something obvious like something jamming the flywheel, it is likely a connecting rod has broken or disassembled itself.
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    Two Layers of 3/4 CSM versus One Layer of 1.5 CSM

    CSM is strong in all directions. Not as strong as the equivalent weight of cloth, provided it's fibers are laid at a bias. Clearly 5/8 plywood with CSM is stronger than 1/2 plywood with the same CSM layer.
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    Mercury 90 horsepower tilt

    Actually relays supply ground to the PTT motor, when not energized, and +12VDC when energized. They are different than solenoids. However, you do need to check the wiring and especially the connections to make sure your relays get a good ground and good +12VDC for the secondary windings. The...
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    I/O with stiff steering under load. Normal?

    That is normal, which is why most (I had thought all) I/Os came with power steering. You can adjust the zinc anode above and behind the prop to help. There are 3 different kinds. Small fin, large fin and no fin. You will want the large fin anode, if it will fit on your OD, with the prop...
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    how to troubleshoot kill/ignition switch merc '90 115hp o/b

    The stator feeds voltage to the switchbox. It sounds like time to ohm out the stator. A Mercury Factory service manual is your best choice. BTW, voltage on the black/yellow wire is bad. If the stator ohms out OK, the switchbox is the next possible culprit.
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    Two Layers of 3/4 CSM versus One Layer of 1.5 CSM

    You will want access to your fuel tank. On some newer boats, the OEM casts a cover cored with 3/4" wood, over the fuel tank. That way, about 8 screws allow full access and removal of the tank. You look to have joists over the fuel tank. It would be best if the cover didn't need them. My...
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    Shifting Forward, RPMs rise before engaging

    It sounds like your shift cable is not adjusted correctly, or something is wrong with the shifter. Take a look at the shift cable, while someone moves the control into forward (motor off). The shift cable should move immediately as the throttle handle moves. If it does, the cable is...
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    Transom Paint

    Most one part urethane paints are labeled for top side use only. They do not hold up when submerged for an length of time. Two part urethanes are made for below the waterline use.
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    Two Layers of 3/4 CSM versus One Layer of 1.5 CSM

    Fiberglass cloth and resin do add a lot of strength, plus waterproofing. Not sure where you get your info. 1/2" plywood is usually strong enough for boat decks. Remember, it is the span of the plywood across the stringers and frames, that dictate the thickness required. Most stringers are...
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    Looking for a light, all around anchor

    People use light duty line (1/4" cotton) instead of zip ties. Whatever you use, have more of it on board, just in case you need to anchor again.
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    MERCURY CONTROL BOXES

    Merc did like to make wiring harnesses work for multiple motors. During the 70's Merc was changing from battery powered CDI ignition to ADI. They made sure to have both the power wire and killer wire in the harnesses, so they would work for both types of ignition. So you could replace a 1975...
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    how to troubleshoot kill/ignition switch merc '90 115hp o/b

    Disconnect the black/yellow (killer) wire at the switchbox, or at the ign switch. If spark returns, that wire is being grounded somewhere to kill the spark. The insulation can rub off and ground it.
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