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  1. C

    50 HP mercury wont shift into N or R

    You do not need any gaskets or seals. You do need to put some grease on the driveshaft and shift shaft splines, before reassembly. You also need to mate driveshaft and shift shaft splines, during reassembly.
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    How do I check kill switch?

    If she won't fire with ether, you have no spark. If you have spark, and still no fire, the timing must be way off. I would recommend you find top dead center on the top cylinder and observe the timing marks. They should indicate TDC, or real near to it. I am not sure if flywheel can slip on...
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    Depth gauge alarm

    The transducer often does not work in some parts of the boat. Has it ever worked for you in this location. Some folks epoxy or caulk the transducers in place, as Dingbat says. Hopefully they test them in that spot before. My boat once needed a cup of water dumped into the bilge, at the...
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    1150 Link & Sync Question

    You may want to buy a new waterpump base. It will come with a new seal. I do believe the rubber "lips" face down. Make sure the driveshaft is clean and greased before installing new pump base and seal. Sand it clean if necessary. Grease both splines. Not sure if you realized that...
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    50 HP mercury wont shift into N or R

    It is very possible for the shift shaft to be so far in forward that it will not shift out of it. Neutral is CCW from forward. Reverse is CCW from neutral. Drop gearcase, set control to neutral, set gearcase to neutral, by turning lower shift rod CCW until it clicks into neutral, then align...
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    1990 Johnson 60 hp no at power full throttle, no cough or sputter

    If the motor is truly going 3000 RPM and you are going 5 MPH, it is not the elevation or growth. Either the tach is wrong or more likely, the prop or gears are slipping.
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    Depth gauge alarm

    Is the transducer inside the hull or on the transom? If on transom, make sure it points down, not detecting the hull. If inside the hull, it may be hitting some structure inside the fiberglass or some void. Maybe move it, to a solid glass part of the hull. It also must be wet to work properly.
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    1150 Link & Sync Question

    The image in post #51 is the drive key for the impeller. It comes in most kits, if not all kits. It is essential as it drives the impeller. I like to install the gearcase in neutral. BTW - There is no issue installing the gearcase in any gear. Neutral is simpler, IMo. Installing in...
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    Fuel Tank Shape - Lesson Learned

    Gee, put some globs of polyester putty on the tank to correspond with the neoprene pads stuck to the tank.. Drop the fuel tank on the hull and clamp it down. The neoprene pads will be captured by the poly putty and the tank will be supported.
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    Hull issue on powerquest

    The best way to repair is from the inside. Is the deck soft? The best way, IMO, is to expose the inside part of the crack, grind it down until flush with the outside, and lay several layers or 10oz cloth on the inside, overlapping the repair by 1/4 inch., to fill it in. Now refoam it and...
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    System Check troubles and Tach.

    That cluster of green, black/tan, white/tan is for PTT trim sensor. Big green and Big Blue are PTT motor wires. Pin 8 is power to the horn. It should sound a beep, when power applied to system check gauge. Power should then disappear on that wire. Clearly power is getting on pin 4 very...
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    Alternate controls to replace 1980’s to 1990’s outboard controllers?

    Gee, a simple internet search should tell you the answer. A lot of aftermarket controls work for Merc and other brands of engines. The search should show PTT switch type and engine fitment. I never heard of the obsolesces of thumb switches.....
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    Can lower OPEN value of overheating sensor, sound false alarm?

    Not sure what to say. Those temps don't make any sense to me.....
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    Fuel Tank Shape - Lesson Learned

    You could cover the tank bottom with saran wrap, and substitute polyester putty for the modelling clay, to permanently fill in the gap. Make sure the hull is sanded smooth and wiped with acetone, before applying the polyester putty. The saran wrap will keep the putty from sticking to the fuel...
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    impeller in need

    Mercury used only a few waterpumps on all of their models. They are widely available. Any marine stores near you? They may have what you need. On line is easy as well. SeaRay used Merc OBs (painted white) on some of their boats. Not sure what kinds of parts they stock.
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    1150 Link & Sync Question

    Judging by the position of those impeller vanes, it was not turning with the driveshaft. You are installing the stainless steel key, to drive the impeller, right? Non PTT models have a locking rod that locks the engine down in all but forward. The shift guide in in the gearcase, just in...
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    System Check troubles and Tach.

    To add to what Dingbat said, which I thought confusing. If the gauge doesn't work, and you have voltage on pin 1 and ground on pin 2, the voltage supply is good, therefore the gauge is bad. Also, I think the tan/yellow wire will be open when oil is being pumped by the VRO pump. Test 9 says to...
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    Can lower OPEN value of overheating sensor, sound false alarm?

    That table is very strange, but just for your motor. The rest of the entries looked about what you would expect. Even if the coolant water was pressurized to 7lbs, like an automobile, the coolant water would still boil, before the sensor closed. I am hoping the table is wrong. You said you...
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    Mercontrol

    OK, try this. Set throttle handle to neutral, usually 12 o'clock. Look at carb throttle plates. They should be closed, or really close to closed. Your motor will have plastic choke shutters. They should be open, and you should be able to see the brass throttle plates, in each carb. Push...
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    system check wiring diagram

    Pin 1 is purple wire, should have ign +12VDC Pin 2 is black wire, ground all the time Pin 3 is grey wire, is tach sender Pin 4 is tan/yellow from VRO pump, should not have voltage. Should ground to indicate "no Oil" alarm Pin 5 tan/black is low oil in reservoir. Will ground when low oil...
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