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    Trim motor 1994 Black Max 150

    The OEM trim motor replacement kit (2 wire motor with relays) is 878265A6, but NLA. I would check ARCO as they make replacement kits for that engine, and for a whole lot cheaper than OEM. Likely you will need to replace the solenoids of your 3 wire motor with the relays and wiring harness for...
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    Mercury Ignition Coil Replacement for P/N 336-4528

    Amazon has a new one for $120. https://www.amazon.com/dp/B00N6D93VU?tag=picclick0f-20&linkCode=osi&th=1&psc=1 Newer Merc 9.8 motors have a coil that is more avail, but just as pricey. Coils are pretty tough. A used one probably works. A local salvage yard might allow you to exchange it...
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    1971 135hp tower of power upper shift shaft coupling destroyed!!!

    The coupling is held to the shift rod with a pin. I do not know if one can push the pin out, in that tight place. The shift arm on the top of the shift rod is also held on with a pin. That might be easier to get out. You might (might) be able to pull the carbs and pull the shift arm up to...
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    Tower of Power Cold Start Questions

    I had a Merc 1500 IL6 for 25+ years. I never flooded my motor. My recommendation: Primer bulb pumped hard, cold start all the way up, hold choke button (or push key) and crank her until she fires. Repeat until she starts. If she stalls, crank her without choke for a second or two. if no...
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    1996 Evinrude 88 - Drive Shaft Seal Should never leak under pressure / vacuum - right?

    That looks to me like the driveshaft bearing might be bad. I would pull the carrier off and replace it and the seal and the oring.
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    1996 Evinrude 88 - Drive Shaft Seal Should never leak under pressure / vacuum - right?

    A lot of those motors have a 2 piece driveshaft. The upper piece moves, simulating a leak in the seal, when the gearcase is off, but not when the gearcase is installed. Use a bicycle pump to pressurize the gearcase with just a few PSI. The leaking seal will be obvious. keep the driveshaft...
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    Is 90hp ob enough??

    A 14 footer with a 65 HP motor is likely overpowered. That is a different scenario than we have here. I also would expect the skier would be able to drag the stern around a bit, due to the light weight of the aluminum boat. The 90HP motor may need a different pitch prop for water skiing...
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    coil check values

    The specs I gave were for that coil. It takes a decent ohmmeter to measure the difference between a dead short (zero ohms) and .02 ohms. What issue are you having? The coils must have a good ground to the block, and clean connections from the switchbox.
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    2000 150 john 60* shuts down on take off.

    crowleymarine says those jets are backordered. $17 ea Not a bad sign. Dougrussell says they have all of the various high speed jets in stock. $23-$25 each.
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    2000 150 john 60* shuts down on take off.

    The Vapor separator is a sealed bowl like a carb bowl. It had an inlet needle, seat and float. It allows the vapor (if any) to be removed from the fuel supply and burned by the motor. The OMS pump and vapor pump create enough vacuum in the vacuum separator to keep the vapor separator filled...
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    Transom wood removal and replacement

    Not sure when you plan to replace the transom again, but it is too soon for a replaced transom to fail. You need to figure out whet went wrong with the original job, or I fear you will be doomed to repeat it. BTW - Wet transoms can last a long time in saltwater. Freshwater rots 'em out. Do...
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    70 HP Mercury won't run with rectifier connected to battery

    As soon as you connect the stator wires to the rectifier without the ground and/or charging wire, and start the motor, it will blow the rectifier. So don't do that. if you read AC on the DC side of the rectifier, the rectifier is bad. if the stator is shorted to ground, thru the rectifier...
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    coil check values

    OK, let me guess what kind of motor and coil you have. On my mercury motor (year and HP intentionally left off), the primary winding of an ignition coil is .02-.04 ohms resistance. The secondary winding is 800 - 1100 ohms.
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    Merc 90 2smoke wont fire

    Carbs could still be dirty. Are you choking it? is the cold start lever or throttle only button being used?
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    Motor slow acceleration then overheat

    Switchbox issue. Best to replace both of them.
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    Is 90hp ob enough??

    The OB boat will have the most room in it. The I/O motors have the large doghouse, which eats up floorspace. I like the OB. The power will be fine for most applications.
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    Mercury 50hp 2 stroke

    Looks like a bad powerhead base gasket. The only cure is to pull the powerhead, clean the mating surface and install a new gasket. I find it easier to pull the gearcase first. Rebuild the waterpump if it needs it, and while that is off, pull the powerhead.
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    1978 Mercury Black Max V1500, Surging at high throttle.

    Does the engine rev up, or just run at just above idle? 6MPH is probably somewhere around 2000RPM, on most boats. Do your RPMs exceed 2000? If so, the prop hub may be bad. if not, your motor is not making proper power for some unknown reason.
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    Motor slow acceleration then overheat

    Check the torque on the cylinder head bolts. I have had those engines have them loosen up over time. Are all cylinders firing? Are all spark plugs the same color?
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    Engine power loss

    Your compression is fine. I think your shop is part of the problem. Bent propshafts cause noticeable vibration in the drivetrain, and corroded bearing carriers don't cause any issues at all. They probably just needed to make that balloon payment. if your engine revs up and has a load on it...
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