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    90hp Merc 3cyl reaches 3000RPM but takes awhile to go over 3000RPM

    Gee, what prop pitch and what kind of boat? For extra credit, what is the gear ratio of your gearcase? Have you changed props recently? Revving up under no load is not relevant. You could ohm out the high speed stator windings.
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    How to find a spark plug wire that is discontinued?

    If the length is good and the conductor is stainless steel, and the terminals and length match, it should work. I am surprised that Merc did not make the wires available. They are required to carry parts for 20 years, which your motor is that old. There are parts available for a lot older Merc...
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    How to find a spark plug wire that is discontinued?

    OK, the web says your motor was made by Yamaha, and the wires are avail from them or Sierra. Yamaha 18-8847-1 avail from Sierra https://www.wholesalemarine.com/sierra-18-8847-1-yamaha-spark-plug-wire-set/?avad=220733_d3b9ca8a1 With the reliability of the internet, You might take one of your...
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    Water pump tell tale

    OK, that is unlike the IL4/6 motors I had from that era. Did you check Crowleymarine?
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    Merc Controls

    I had a 1977 Merc IL6 motor, and when that went bad, put a 1993 Merc V6 motor on the boat, using the same controls. No issues at all. I have never worked on your motor but would have expected the old control to work. Mercs usually push the throttle closed when the throttle handle is in...
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    How to find a spark plug wire that is discontinued?

    Outboard motor spark plug wires usually have stranded stainless steel conductors. You can often buy them on the web. You should be able to make them up, if necessary. What year and HP is the motor?
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    Water pump tell tale

    The telltale is a pipe fitting on the block, a hose and a plastic fitting in the lower cowling. What do you want/need to replace?
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    AMS Oil 75W90 or Evinrude Lower Unit Gear Oil

    With gaskets on the plugs.....
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    50 hp force by Mercury electrical draw

    OK, you have a typo on post #4. You said now vs no.
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    Bayliner 1950 Capri Classic - Carpet replacement

    If the plywood deck is dry and sound, a layer of medium F/G cloth or mat and some polyester resin is all that is required to rehabilitate the deck. A lot of boat builders used a chop gun to spray a thin layer of chopped strands of cloth and resin onto the deck. This works for a while, but can...
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    Yamaha 2-stroke 4hp overheat problem

    There was an article on the internet on various chemical flushes for outboards. Some chemicals are pretty hard on the aluminum casting of the engine, and some others didn't work at all. You might check it out before flushing.
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    50 hp force by Mercury electrical draw

    A burnt voltage regulator almost always means it is bad. A good VR should not draw any current. It sounds like you have some other issue.
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    Trailer Painting

    OK, in for a penny, in for a pound.
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    Fuel filter question

    One advantage of those plastic bowl Racor's is that there are two places for them to leak, and they often leak around the plastic bowl. Another advantage is that the cartridges are real expensive, and the plastic bowls can become brittle in sunlight. The final advantage is that they are not...
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    mercury keeps fading

    A shop could not get the gearcase off? That's a new joke, right? If no joke, you need a new shop. Overheat alarm sensor is on the cylinder head. The sensor should ground when it detects overheat. The overheat alarm should have power to it when the ign key is on. The other side of the...
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    50 hp force by Mercury electrical draw

    You should repost this in the Force forum, and provide the year of the engine. Most CDI units run off the stator, and do not require battery power, some use battery power when cranking, and some use battery power all the time.
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    Wiring from dash key switch to control box

    Can you clarify? It sounds like you have a ign keyswitch on the dashboard, and want to go to a side mount control ign keyswitch, and abandon the dashboard ign keyswitch?
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    Trailer Painting

    Gee, I bought a brand new 4400# galvanized trailer for $3K, a few years ago.
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    93 manier 75 hp

    Item 20 https://www.crowleymarine.com/mercury/oem-parts/outboard/1993/1135412nd/throttle-lever-and-shift-shaft?ref=22
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    93 manier 75 hp

    Yes, it is a swinging cover. If it broke, and I could not replace it, a single piece of wire across the throttle cable would hold the cable in place easily.
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