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    No power to electric fuel pump

    How can a bad ground effect battery positive voltage to the pump?
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    No power to electric fuel pump

    The ECU applies the ground to the pump to cause it to run. Turn the key to the on position and the relay closes. Battery power to the pump motor. Turn the key to the start position and the ECU applies the ground. Motor starts the ground continues to be applied. Motor dies then the ECU...
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    No power to electric fuel pump

    The ECU does not provide battery power to the electric fuel pump. Battery power is from the fuel pump relay.
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    850 Wiring

    Neither of my two Mercury motors, nor my Yamaha, used tinned wiring.
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    Dual Prop Pitch vs WOT rpm?

    When you use the term DP are you talking about contra rotating propellers like Suzuki, Yamaha and Mercury use on some models?
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    Prop questions

    Red line RPM for a Yamaha 70 HP two stroke is 5500. Yamaha suggests propping the motor so that when at WOT, boat loaded, motor trimmed up to the point of best efficiency, the motor turns at or near the red line RPM. Best performance, best engine life. Even though you may never run at WOT again...
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    Left side lean?

    The trim tab anode is used to correct the tendency of the motor to turn left, or right, which can vary as the motor is trimmed upwards or downwards. Motors with conventional gear cases want to turn right when trimmed down and to the left when trimmed up.
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    2003 yamaha 50 2 stroke tiller conversion

    Negative.
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    2003 yamaha 50 2 stroke tiller conversion

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    Yamaha Trim Tilt Switch Side Mount Remote Wire Connection

    There are also bullet connectors within the control box.
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    Bleeding Oil Injection Yamaha 60tlrc

    The hose from the tank to the oil pump is self bleeding. Bleeding is to purge air in the hoses from the pump to the carburetors.
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    Yamaha Trim Tilt Switch Side Mount Remote Wire Connection

    Are we talking about the switch in the handle of the 703 remote control box or the connection point for the addition of an optional trim/tilt switch?
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    Bleeding Oil Injection Yamaha 60tlrc

    The oil system does not need to be bled if all you did was remove and reinstall the oil tank. There will be oil in the line from the tank to the oil pump. Once you refill the tank any air that is in the oil line will vent itself into the oil tank.
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    Yamaha Trim Tilt Switch Side Mount Remote Wire Connection

    The trim/tilt wires are in the ten pin harness from the remote to the engine main engine harness.
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    GPS Speedo

    When "propping" a motor, better to use Pitot speed or GPS speed?
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    GPS Speedo

    I am that someone. Point was to indicate that GPS speed and pitot tube/paddle wheel speed are for two different measurements. One cannot be compared to the other. One is not inherently any more accurate than the other. If a boater is not aware of what is going on with his boat with respect...
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    GPS Speedo

    Depends upon what speed is desired. Speed through the water (think boat and motor performance) or speed between two points in space. Pitot tube or paddle wheel for the former and GPS for the latter. When taking off and landing aircraft need speed through the air. Not speed over the ground...
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    Lower unit repair

    A hydrofoil could void a warranty. Most likely related to damaged caused by the foil. Which generally would be the anti-ventilation plate. I can see the use of a non Mercury propeller being used on a Mercury motor voiding a warranty claim if the propeller harms the lower unit. Shops need to...
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    Lower unit repair

    Different perspectives on the world. I worked for one company the majority of my life and then for five plus years following that with another company after I retired. Lockheed being the first and Yamaha being the second. If anything, when in doubt, both companies erred on the side of the customer.
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    Lower unit repair

    If part of the anti ventilation plate broke off and a hydrofoil was installed I can see that not being covered by a warranty. If something unrelated to anti ventilation plate became defective, and it would otherwise be covered by a warranty, I suspect the defective part would covered under the...
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