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    Mercury 850 thunderbolt 1974 gearbox check

    You can remove the six 5/16 bolts that ring the flywheel nut. That removes the outer flywheel. Set the motor to TDC before removing the outer flywheel. The stator will come off with a allen wrench. Expect the wiring to be bad up to the stator. Dingbat, despite what your regulation says...
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    98 Johnson leaking hydraulic fluid.

    Grease fittings usually unscrew. You can buy replacements as well.
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    Mercury 850 thunderbolt 1974 gearbox check

    It is a bad idea to put a fuse on the charging wire. If it blows or has a bad connection with the engine running it will destroy the rectifier. I am also not sure what would happen to the switchbox, if the fuse blew with the engine running, as the battery regulates the voltage. You might...
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    98 Evinrude 115 (E115SLECM) Not going into gear

    As Racer said, the shift rod can bind where it goes thru the shift pocket cover. However, this usually affects reverse, as the shift rod is pushed down for reverse. If your motor shifts smoothly, at the engine (prop being turned), the issue is shift cable or control.
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    Mercury 850 thunderbolt 1974 gearbox check

    Those engine harnesses are available on the web. Of course you could make your own with 7 different color wires and some ring terminals. Check the wires that go to the distributor. They also go bad. The rotor is non-removeable, fragile and $240+USD to buy. You need to install it then...
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    Mercury 850 thunderbolt 1974 gearbox check

    Be aware that your cunning plan B can leave you stranded on the water, when/if the gearbox fail under use.
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    Mercury 850 thunderbolt 1974 gearbox check

    If the gearbox was full of water, the gears and bearings are likely bad. Fixing them takes special tools and expensive parts. If the engine runs well, you might look for a new (used) gearbox.
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    98 Johnson leaking hydraulic fluid.

    My '98 Johnny 150HPV6 has a grease fitting under the manual tilt lock. That is for the steering swivel. Yo need ti tilt the motor and swing the manual lock down to get to it. It also has 2 grease fittings on the tilt tube.
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    Looper or cross flow

    A crossflow will usually have removeable transfer cover plates on the side of the block. Loop charged motors do not usually have those.
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    Can you change from welded to bolted?

    Bolt on crossmembers have fittings that bolt to the crossmember and the frame. This allows them to be flush with the frame. You would therefore need to find both pieces of hardware. The real question is whether the frame is solid, as well as the springs, axles and wheels. If those things are...
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    Adding a Temperature Gauge

    Be aware that temp gauge senders are different than overheat sensors. I expect the sensor connected to the guardian system is the latter. Overheat sensors will not power a temp gauge as they are open or grounded, whereas a temp gauge sender has variable resistance to ground, based upon the...
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    Harness issues

    The neutral safety switch must close for power to go to the starter solenoid. Make sure the control is in neutral, and make sure power is getting to the starter solenoid, when you turn the key. The positive battery cable should run to one of the large posts on the starter solenoid. This power...
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    WOT problem

    You might find something on e-Bay The 40 HP might be close enough. Try to stick with OEM manuals. https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313&_nkw=mercury+outboard+service+manual&_sacat=0
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    Boat Cover Ribs/Braces

    Gee, how about a 2X4 ridge pole? If you need it, you can tie some light rope from gunwale to gunwale across the ridge pole, to help support the cover..
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    WOT problem

    Your motor has a specific setting for spark advance, when throttle is closed, but ready to open. It also has a spec for max spark advance. These need to be set precisely to avoid engine damage and allow proper operation. I would therefore recommend you perform a link and synch. A OEM service...
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    Viking 190SI

    Controls are specific to engine brand. Some controls can be configured for Merc and Johnnyrude, Yammie etc. These are usually made by third parties. Steering systems are usually universal. Fuel systems are easily adapted. Wiring diagrams are hard to find for specific models. You can try...
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    2002 Rinker Captiva 192

    Could be several things or combinations. Steering cables bind. Steering rod on outboards get dirty or corroded. Sterndrive power steering rods get dirty or corroded. Power steering fluid gets low. You need to isolate the binding to the correct component. So disconnect the steering cable...
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    My winter cover solution

    I support my cover as Lou does, except I use light rope instead of fiberglass lath. However, there is usually a spot or two where the water pools. This year in addition to the light rope support, I took some web strap and installed snaps on the ends and a buckle in the center. The snaps...
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    Jack up the bow while boat is on the trailer ...

    Jack up the front of the trailer. The trailer should be plenty strong, as the bow is pretty light.
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    Harness issues

    You could probably do that, however, without knowing exactly what motor year you have, I do not know for sure if it will work. Hardwiring the wiring to the motor would make it difficult to remove the motor from the boat, without disconnecting the wires at the various parts of the motor. A...
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