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    Ethanol Gas Observations

    Fiberglass tanks are not used with ethanol, because the alcohol is hard on FG. You see that in the JB weld failure. A green tinge on spark plugs is an indication of overheat. Same thing with the real clean spark plugs. Your carbs may be partially clogged leading to lean mixture. alcohol...
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    2003 Johnson 150 port temp sensor

    If the diode was open, I do not think the alarm would "see" the ground signal. The diode is between the two overheat sensors plus the connection to the powerpack to signal SLOW, and the alarm sensor. The other alarms have their own signal wires.
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    repair mishap

    This is a question for the Force forum. Is the rectifier still good?
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    canopy

    Not sure what a canopy is. Bimini top? Navy top? Bimini tops can be pretty universal. Navy tops are more unique. Some marine stores carry premade navy tops and other canvass products for popular models.
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    Trim tilt

    I doubt you need a new control. It sounds like some sort of wiring issue. What year and kind of motor?
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    Gas tank issue

    If you can get to the gas gauge sender, and remove it, you will have a hole large enough to siphon out any liquid and insert a scope. Cleaning depends on what is in it.
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    2003 Johnson 150 port temp sensor

    You might intentionally ground one of your overheat sensors and see if you get the overheat alarm. If no alarm, maybe the diode in the wiring harness is open?
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    Recovering Boat Seats

    Yeah, that is why I use nylon coat thread, or polyester outdoor thread. They hold up for years. Carpet thread is another possibility, but not all machines can handle it.
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    Hole shot, Mercruiser 4.3L

    Propping that V6 for mid-40MPH will rob lots of power for slalom. I presume the boat is 18 foot plus. I had a similar setup. I installed tabs. So tabs down, full power was better to start a skier, but not great. She also rode like a garbage scow with tabs down. Run a 17P prop for slalom...
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    Can't decipher serial number on Johnson Super Seahorse

    VXL-11C will tell you the year. Do a search on it. early-mid 60's V4 right?
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    Hard steering

    Rack and pinon? Rack will unbolt from pinon. Rotary Steering? Undo the cable clamp, and turn the wheel and cable should come out of head.
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    I need a diagram of 1977 presolite trim and tilt

    I believe the PTT motor has a bi-metal circuit breaker inside it.
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    Mercury kill switch wires

    Well, the keyswitch is supposed to ground the black/yellow wire when off, so it should have zero ohms when off. I think the 111 ohms is your issue. I would disconnect both black/yellow wires at the switchboxes and see what the black/yellow wire resistance with the key on.
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    Mercury kill switch wires

    The keyswitch will only have a single black/yellow wire. It will run to a switchbox. The other black/yellow wire on the other switchbox will connect to it in the engine harness.
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    Mercury kill switch wires

    I doubt you have a mercury (small m) switch on that motor. The black/yellow wires are grounded at the ign switch to kill the spark. So if they are both disconnected at the switchboxes, the engine should run and not stop using the ign key. So it sounds like one of them is grounding somewhere...
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    Stand-alone tilt/trim pump

    The top of the reservoir is screwed to the bottom, with a round rubber seal. Those can leak as well.
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    Johnson 150 v6 carbs

    Gasoline will dissolve most gasket maker material. Fuel is supposed to travel from the throttle bodies, to the carb bowls. A part of the gasket seals that passage. Sierra has been known (to me anyway) for providing the wrong gaskets in the carb rebuild kits. You might compare the gaskets...
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    2003 Johnson 150 port temp sensor

    The 2 wire temp sensor also controls the Quickstart function, which advances the timing until the motor warms up. The fact that you do not get a temp alarm is worrying.
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    Boat ladder

    I hate when boat OEMs do that. My neighbor's 27 foot BW Outrage has that issue. Can you drill an access hole thru the cap, to install washers and locknuts? There are a variety of plugs, hatches etc, to cover the access holes, to clean it up. You really want bolts......
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    98 Mercury 150 running issue

    OK, I am out of SWAGs. Black plugs mean rich combustion or no fire, in my experience. Your carbs have a single float chamber, so flooding would affect starboard side of motor. It affects the top two port cylinders, so potentially two carbs, but only one barrel each. OK, one more SWAG...
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