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    1975 115 2-stroke inline 6 WOT problems

    Those motors never had a fuel filter. They have a screen in the fuel pump An inline filter might restrict fuel. I would remove it for testing and if she passes, install a 20GPH water separator. There are also screens under the brass elbows and tees on the carb covers. They do not usually...
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    Mercury Tilt switch in remote control question 88688a26

    Toggle switch on handle? They can get water in them, which completes the up circuit. See if you can blow it out with some wd-40 or equivalent.
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    1975 115 2-stroke inline 6 WOT problems

    What prop pitch and what boat? You may be simply over propped. Squeeze the primer bulb at WOT and see if she will rev up higher. If so, replace the fuel lines with 3/8". However, I think 5/16 fuel lines are OK, but the fuel pump, if the "figure 8-shaped" one can be marginal. If primer bulb...
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    Insane good tower of power fuel economy?

    That is very good performance. I had a 1500 on my 16 foot Avenger and had the same top speed, but I do not think the fuel economy was as good. I think you made a mistake by not reinstalling the foam floatation. It only weighs a few pounds, and could save your life. That boat is very likely...
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    Modifications/equipment changes required to repower from '95 Force 120 to '76 Mercury 1500

    I would be surprised if the transom brackets will interchange. A simple test is to drop the 4 sheet metal screws that hold on the lowermost cowling. Count the powerhead mounting bolts. See if the force has the same amount. Since the powerhead is the Chrysler design, I do not expect much to...
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    Mercury 850 Thunderbolt 85 hp 2 stroke leaks gas out top carburetor before and after carburetor rebuilds.

    Gee, can you give us some more info? What year motor? Does she have spark? Did you choke the daylights out of her? They need heavy choke to start.
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    1978 Mercury Black Max V1500, Surging at high throttle.

    Don't screw around, use Merc wires. You can get them aftermarket and save some $. Sierra likely makes them and they are likely avail in a lot of places. You must do a link and synch. If boat shops tell you different, they are nuts. You will want an OEM service manual. Succinctly, when the...
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    1980 mercury 50hp carby

    Take a look at the parts listing on a site such as crowleymarine. My '77 had a plastic grating over the carbs. It kept the large stuff like rodents out of the motor.
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    Modifications/equipment changes required to repower from '95 Force 120 to '76 Mercury 1500

    I had that 1500 Merc, so I am familiar with it. The Force, not so much. The Merc will have a power trim pump that mounts in the boat. 4 hydraulic hoses will need to be run to the trim cylinders mounted outboard of the transom bracket. There is a 4 wire trim harness that runs to the dashboard...
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    Grounding your Fuel Tank and Fuel Fill

    If you put the positive lead on a voltmeter on the battery positive, and the negative lead on the fuel tank, and get a 12VDC reading, the tank is grounded somewhere.
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    Inside prop damage

    There is supposed to be a brass hub that is splined to the propshaft. Maybe it is still on the propshaft? Hopefully it will come off peaceably. Props are made up of 3 main pieces. A brass hub which is splined to fit the propshaft, the shell of the prop which has the exhaust hub and blades...
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    Safe to tow with bow not resting on front roller?

    First see where the transom rests on the rollers. Perhaps the boat was not winched up all the way. You want the rear rollers to be near or at the transom, but, if the rollers pass the transom, the boat will fall onto the trailer frame which is bad. When the rear rollers are in their proper...
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    1978 Mercury Black Max V1500, Surging at high throttle.

    Did you perform link and synch on that motor after replacing the ign components? If not you need to do so.
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    Grounding your Fuel Tank and Fuel Fill

    A ground on the sender is necessary for the fuel level sensor to operate. Perhaps the fuel gauge is grounded and that ground is connected to the tank somewhere.
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    Starting mercruiser 350 after boat almost sinks

    The thunderbolt ignition should be potted and waterproof. The distributor (if you have one) needs to be dried out. Wiping it dry is probably fine. Turning the motor over with the plugs out is a good idea, as it will blow out any water. Also, add some oil to the cylinders and turn it over to...
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    1986 90HP Crossflow Johnson - RPMs increase at WOT when steering

    Turns at high speed tend to cause the prop to ventilate. Some props ventilate more than others. I suspect that when you changed props, the new prop ventilates a bit more than the old prop.
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    Starting mercruiser 350 after boat almost sinks

    If freshwater, take the starter and alternator off and when wifey isn't looking, put them in the oven at 250*F. Bake them for an hour or so to dry them. They can survive.
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    Outboard Lock Recommendations?

    Why would someone steal a 40+ year old motor? What's it worth fenced, scrap value maybe? There has got to be something better to steal. Your prop is likely worth as much as the motor. In the 70's Mercury did make antitheft nuts for the transom bolts. If you can find them on flea bay, the...
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    1993 Johnson 115hp prop for sking

    Well, the Monte Carlo method of prop selection does occasionally work.
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    Mercury 850 Thunderbolt 85 hp 2 stroke leaks gas out top carburetor before and after carburetor rebuilds.

    That motor sounds like an older (70's) one. The float must be replaced with a hard plastic one. The original ones were foam and would dissolve. Also, the all carb gaskets, inlet needle and seat must be replaced. Some inlet needle seats need the copper gasket, some don't. Install it and see...
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