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    Tach for Merc outboard

    It looks to be wired correctly. Maybe the rectifier is bad. Disconnect the stator wires from the rectifier and connect the grey wire to one of the stator wires, and see if it works. If not the stator is either bad or incompatible with the tach. Do not disconnect the battery wire from the...
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    Bolts/screws boke off, thread/pipe tap -size? Alpha One Gen 2

    Pipe thread is usually tapered. You will want a straight tap for those. If your diameter measurement is accurate that would be a #8 screw which is 5/32". Those can have 24 or 32 threads per inch. If your threads measurement is accurate, they are 24 threads per inch. They look to be larger...
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    Tach for Merc outboard

    Yes, a bad rectifier can cause loss of tach signal. Is the grey wire actually connected to the ac side of the rectifier? That is obviously necessary. Does your engine wiring harness even have a grey wire?
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    Tach for Merc outboard

    The signal for the tachometer originates in the rectifier or voltage regulator, whichever you have. Pull the cowling off the '96 motor and trace the grey wire. It should connect to something. It does have a charging system, right? Not all 25HP models do, especially non electric start ones...
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    Alternate controls to replace 1980’s to 1990’s outboard controllers?

    Merc throttle cables and shift cables are different, but can be swapped for Johnny type. Biggest issue is that Merc pushes the throttle closed and Johnny pulls the throttle closed. Also, the shift throw may be different. Wiring for the most part, could be adapted.
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    1974 mercury 2 stroke water pump operation?

    That motor is pumping water out of all the right places. However, as Racerone says, the impeller should be changed. Those motors do not have a thermostat, and rely on more water being pumped to cool the motor than is needed. There is not much extra capacity, and if the impeller is worn...
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    Mercury 500 thunderbolt 70s black and red won’t pee water

    Those telltales do clog easily. The important exit for the water is the gratings above the antiventilation plate, and thru the prop. Did water come out those places? You can pull the telltale hose off the cylinder head and see if water exits there as well.
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    1990 Evinrude 200XP electrical issues

    I would recommend a factory service manual. the marineengine web site should have one. Have your model number handy. It could be something as simple as bad wiring, bad insulation on the ign kill wire or other.
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    Uncommanded tilt up

    Sometimes water can get into the switches and complete the up circuit. Try some wd-40 to blast it out of the switch.
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    1150 Link & Sync Question

    The hull looks pretty flat bottomed. She will slide quite easily with a flat bottom. I would remove the whale tail. They are useful for getting on plane, but you say that is not an issue, and they usually scrub off some top speed. BTW that motor has 1976-77 decals on it.
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    Fuel Tank Shape - Lesson Learned

    Sure, $20/qt at amazon. I would expect 1 qt to be enough. Search for Kitty hair, for that product...
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    Mercury 175 wont shift

    Take a look at the crowleymarine site. They have the exploded parts pictures for your motor. The shift rod bushing is likely a piece of plastic wrapped around the shift rod top casting bushing surface, just below the lower carb. Actually in the parts list, you may not even have a bushing...
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    1150 Link & Sync Question

    If the distributor is set to spark #1 plug at TDC, idle pickup setting is TDC, not 4-6*BTDC, as it should be. You may not need to move the collar on the distributor. However, if the idle pickup timing is incorrect, you adjust it using that collar. That is the idle pickup setting procedure...
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    1150 Link & Sync Question

    There is a collar on the distributor, secured by two bolts with 5/16" heads. This collar is about 1/2 way up the distributor body and rotates to set the carbs to open. So, with spark plugs 2-6 out, installed in wires and grounded, prop off, motor in gear, jumper the starter solenoid to crank...
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    Fuel Tank Shape - Lesson Learned

    So you are not going to try polyester putty? It won't run and gets as hard as peanut butter. You could use the kitty hair putty, which is even thicker and latterly stronger...not that you need any lateral strength.
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    1150 Link & Sync Question

    You only need to grease the driveshaft to protect the driveshaft seal from tearing. You grease the splines to allow you to take it apart the next time. Link and synch sets the carbs to open at 4-6* BTDC. Setting the Idle speed usually is a retardation of the spark, so yes, the motor should...
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    Mercury 175 wont shift

    Those upper shiftshafts have a single bushing in the midsection. I never saw one corrode, however, I suppose they could rust in the swivel pin, but I never saw that either.... Drop the gearcase first. Now disconnect the shift cable at the motor. Now tap on the upper shift shaft, from the...
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    Boat motor won’t start

    2 stroke Mercs have fuel pumps driven by the crankcase pulses via a diaphragm. If that diaphragm gets a hole in it, raw fuel will flood the crankcase and spark plugs. Fuel pump rebuild kits are cheap. You might rebuild or at least inspect it.
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    Johnson/evinrude long shaft to short shaft

    You might check the powerhead base gasket on each. If they are the same, it likely will work. Also, the gearcase likely has the 2 piece driveshaft. The driveshafts can be swapped, although you may break the connector for the 2 pieces.
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    1996 Mercury 115 2 stroke steering cable broke off in tilt tube

    The tilt tube is likely steel. You will need to hang the motor by the flywheel (use flywheel lifting tool), and unbolt the 2 nuts on the tilt tube. Drive the tilt tube out of the two transom brackets and triple clamp and replace it. Crowleymarine shows the tilt tube is NLA new. You might get...
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