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    TACHOMETER ACCURACY

    Is your prop slipping? Buy a new tach and try it. They do not last forever.
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    3.0L differences

    Gee, it will be simple (and cheap) enough to fix the oil leak, when you pull the engine. Set up some cement blocks and wood to hole the block while you pull the pan. Mark the exhaust manifold so you remember it leaks and store the engine.
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    3.0L differences

    So the leaks will be getting better? or will the manifold rust more and leak more?
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    3.0L differences

    So we went from oil leak fix to water leak into engine fix?
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    115 6c TOP piston cylinder issue

    To address Racer's comment. I had a 1500 for a couple of decades. I found that if the carbs and throttle cables were adjusted for the proper idle speed and acceleration, and the fuel mixture was a fresh 50::1, the engine would idle pretty good, say several minutes w/o stalling. Also, as long...
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    HVAC Run Capacitor Sizing

    Gee, I had no issue buying a fan motor run cap for my furnace at Ferguson. They were also willing to sell me a control board for the furnace. The board was a universal, which I would have had to program. For the same price I ordered an exact control board from somewhere. Amazon provided...
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    power loss and shaking motor

    What is the alarm? Overheat? Maybe the motor goes into a limp mode?
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    HVAC Run Capacitor Sizing

    We have a local Ferguson HVAC store locally. Maybe that is why our local HD doesn't stock it.
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    HVAC Run Capacitor Sizing

    That link showed that no stores in my area (Toms River, NJ) stock it, but it could be ordered. On a general note, I have had mixed results ordering stuff from HD. Sometimes you receive it on time and sometimes you don't get it for a long time, or ever. Not what you want for A/C parts in a...
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    Artificial Intelligence

    AI is an attempt to help computers appear to think. A simple example is matching parts of an object to the object itself. Humans are good at that, but computers are real bad at that. For example, if I showed the average human 50 pictures of parts of a dog, such as a tail, a snout, an ear etc...
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    HVAC Run Capacitor Sizing

    I am surprised that HD stocked it. Amazon likely has it and delivery is a day or two, usually.
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    80's OMC Controls - Trim Switch

    Check on the crowleymarine web site. Look for "rigging and accessories" for the proper year Johnnyrude controls and you may find a part number.
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    Force Air Filters, or lack thereof

    Sure, Cheap cars in the 70s did not hood insulation. They were intake noisy. A lot of more expensive cars had insulation... My '64 comet had some. My '69 Merc Marquis had more. It can help a lot for intake noise.
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    115 6c TOP piston cylinder issue

    Gee, not sure on the 5 nuts. on my '77 and '93 Mercs, I had to cut the upper motor mount bolts and replace the motor mounts and bolts. 7/16 grade 7 I think. Best to check it out. I would let the reeds lie. it is at idle is when they act up. So if a good idle means god reed valves.
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    115 6c TOP piston cylinder issue

    Upon further (mental) review, I think my '73 had a nut under the yoke. My '93 had a retaining ring. Not sure what '77 had. Not sure what you have.
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    115 6c TOP piston cylinder issue

    There is a springy retaining ring under the bottom yoke. To remove the swivel pin, you would have to remove the upper motor mounts, by splitting the exhaust extension. You can leave the yoke attached to the motor mounts and pull the swivel pin up and out, after removing the retaining ring...
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    Impeller stuck on drive rod, got hot and melted the impeller a little.

    Merc water pump bases melt from the heat of the impeller rubbing against the wearplate. It is from lack of water. The upper pump cover seems to be more resistant to the heat for some reason. I do not know what the newer resin hubs on the Merc impellers will do under those circumstances. If...
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    125 HP fails to rev up

    Look at the markings on the heads of the water jacket cover bolts. They are likely grade 5. Look up the torque spec for a grade 5 (or whatever they are) for a 1/4-20 bolt and see what it says. Torque the bolts from the center out, tightening the center ones, then the next "row" up and then...
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    Starter not engaging

    Easy test. Put voltmeter with battery in DC volts setting. Read voltage. Start motor and set to high idle. Read voltage again. Voltage while running should be higher than voltage not running. Also, with engine running, set voltmeter to AC voltage and read voltage at battery. If you read...
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    Force Air Filters, or lack thereof

    There are newer products to line the cowling with to reduce noise, that won't flake off. Self stick foil/foam insulation comes to mind.
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