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    2007 3.3l 250hp starting at 3000+ rpm

    Has it been verified with a tachometer that it is running at 3000 RPM? How long does it run?
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    2000 200hp Saltwater series ,Replaced trim cowl switch, what is this retainer piece???

    What is the model of the motor? They are not all the same. I suspect you are talking about a bracket. The bracket that holds the switch in place. Not understanding how you installed a new switch without having removed the bracket.
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    prov 150 carb question

    Then somebody seems to have attempted a repair previously. Any idea how far the rod was inserted? Too far and it could mess the passageway up. Can you drill the rod so as to get an extraction screw on it?
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    prov 150 carb question

    Extract the balls then drill and tap for a screw. While the balls ares out thoroughly clean the carburetors.
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    2007 40hp Merc carb and compression questions

    The BTR has an electric starter motor. The BNH has pull start. You mentioned pulling the rope when doing your compression test so I assumed (yes, I know) that you don't have electric start. Are you wanting your model to have low compression?
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    2007 40hp Merc carb and compression questions

    Your model motor has an automatic decompression device so that it can be more easily pull started. This throws off the compression test numbers.
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    2007 40hp Merc carb and compression questions

    Yamaha made a number of motors for the Mariner brand and the Mercury brand for many years. All the way up to the Mercury 225 HP four stroke model. Known by many as a Mercaha or Yamamerc. I can only report what Yamaha information says. Following is from the Yamaha service manual.
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    2007 40hp Merc carb and compression questions

    Looks to be a Yamaha power plant. Yamaha data for a 2007 model year F40 indicates the minimum compression pressure as being 87 psi. Yamaha data shows the idle mixture screw setting to be 2 and 1/2 turns out from being just slightly seated.
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    2007 40hp Merc carb and compression questions

    What is the engine serial number? How was the test performed? Motor should have been hot. Throttle wide open. Known good gauge. Battery full charged. Motor cranked until the pressure stopped rising.
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    Cost of carb rebuild

    Dying to hear how fuel that should be entirely/mostly in a gaseous state by the time it enters the combustion chamber can create a puddle.
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    Primer bulb issue

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    Primer bulb issue

    Yamaha's modus operandi seems to be if X parts are needed let's use X plus Y plus Z parts.
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    Primer bulb issue

    Three mechanical fuel pumps, one electric fuel pump and six enrichment valves.
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    Primer bulb issue

    Or perhaps a fuel injected model has been mounted on the frame of a motor that had carburetors.
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    Primer bulb issue

    Is the model of the motor not known? Is it a Yamaha or a Suzuki? MMM. Motor Models Matter.
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    Primer bulb issue

    If and when the motor seems to not be running right pump the primer ball to force gasoline to the motor. You doing with the ball what the fuel pump should be doing. Does the motor seem to run better when you do this?
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    Primer bulb issue

    All primer balls will get softer once the motor is running. The fuel pump(s) lower the fuel pressure within the fuel system from the pump inlet all the way back to the tank.
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    Yamaha 50 hp 2 stroke prop seal depth

    After all else fails...
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    Yamaha 50 hp 2 stroke prop seal depth

    Need a model identity.
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    Suzuki Kill Switch Issue

    In the back of your owner's manual is a wiring diagram. Kill switch is a simple open or closed device. Normally open for the motor to run. Closed to stop the motor. Or to prevent it from running. Ignition stop circuit is tied into the kill switch circuit. One wire from the two devices combined...
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