No power to F9.9 Yamaha

[boscoe99]

Important to test voltages while the motor is being cranked.

 

[wmgeorge]

And it could be as simple as a loose connection to the battery or elsewhere in the positive or negative circuit. If he has a meter with insulated jumper connections he can test it his self. Testing by following the above is the only way to find the problem.

 

[CamanoMike]

Model is 9.9 XPB I'm getting power to the motor and through the fuse, but I don't know how to follow it from there. I had some power at first both to the servo and starter but not enough to engage it. In the end I lost power to everything.

I found the model on the motor. Attached. I appreciate your help. I would take it to a shop, but I don't want to have my boat out of commission for a month or more.

 

[CamanoMike]

Important to test voltages while the motor is being cranked.

 

[CamanoMike]

A problem there would explain why the starter doesn't work, but why would it affect the servo? That is what is confusing me.

I assume that I would have to take the flywheel off to get to the starter.

 

[wmgeorge]

A problem there would explain why the starter doesn't work, but why would it affect the servo? That is what is confusing me.

I assume that I would have to take the flywheel off to get to the starter.

Did you look at your engine, do you know what a starter looks like? Solve one problem at a time, get a meter and do as suggested.

 

[boscoe99]

Do you have a set of battery jumper cables? If so, bypass the control system and the power supply system and connect the cables directly to the starter motor. Positive to positive and negative to negative of course.

If it cranks just fine then that is telling you that the starter motor is good but there is a problem between the battery and the starter motor.

 

[boscoe99]

A problem there would explain why the starter doesn't work, but why would it affect the servo? That is what is confusing me.

I assume that I would have to take the flywheel off to get to the starter.

There is no servo. There is only a relay. Relay is controlled by the key switch.

Relay is normally open. No current flows to the starter motor from the battery. Key is turned to the start position and the relay closes. In which case current then flows from the battery to the starter motor.

To test the relay you can jumper the brown wire terminal to the positive of the battery. See/hear/feel if the relay closes.

 

[wmgeorge]

I think he is confusing the trim motor with the starter. If he did not know what a starter looked like and he said he had power to it??

 

[CamanoMike]

I think he is confusing the trim motor with the starter. If he did not know what a starter looked like and he said he had power to it??

 

[CamanoMike]

I am pretty ignorant of the wiring for the motor, but I do know what and were the starter is. What I don't know is where the terminal wires are to it. I thought that I might have to take off the flywheel to find them. All that I can find is what looks like ground wires that are visible on the outside. Is there any advantage to taking the flywheel off? Will it expose any wires that I can test for power? I understand wiring. I just don't know where the terminals are on this motor.

 

[CamanoMike]

Do you have a set of battery jumper cables? If so, bypass the control system and the power supply system and connect the cables directly to the starter motor. Positive to positive and negative to negative of course.

If it cranks just fine then that is telling you that the starter motor is good but there is a problem between the battery and the starter motor.

 

[CamanoMike]

Sounds like a good plan. Where are the terminals on the starter motor?

 

[CamanoMike]

I think he is confusing the trim motor with the starter. If he did not know what a starter looked like and he said he had power to it??

I know where the starter motor is, but I don't understand why both the starter motor and trim motor lost power at the same time. What is the connection?

 

[wmgeorge]

I know where the starter motor is, but I don't understand why both the starter motor and trim motor lost power at the same time. What is the connection?

1. Take a picture(s) of the other side of the starter.
2. The tie between the trim motor and starter is the connections from the battery to the engine.

 

[brodmann]

That small ground wire connected to the starter looks corroded. I'd remove those 2 ground wired and take a wire brush or sandpaper and scrub that area good as well as the ring connectors on the wires and see if that helps at all.

 

[CamanoMike]

1. Take a picture(s) of the other side of the starter.
2. The tie between the trim motor and starter is the connections from the battery to the engine.

I got the picture now. I don't know where to go from here. I'm sure that this is where my problem is. How do I get to the actual hotwire going to the starter motor? Do I take off that black thing up and to the left of the spark plug?

 

[wmgeorge]

This is a link to a 2014 model, looks like both connections are on the first picture that I marked up but it needs further study. It appears the + terminal is at the bottom of the starter motor. https://www.crowleymarine.com/yamaha/oem-parts/outboard/2014/t9-9xpb/starting-motor

 

[wmgeorge]

This is a link to a 2014 model, looks like both connections are on the first picture that I marked up but it needs further study. It appears the + terminal is at the bottom of the starter motor. https://www.crowleymarine.com/yamaha/oem-parts/outboard/2014/t9-9xpb/starting-motor

So it must be fixed now?

 

[CamanoMike]

So it must be fixed now?

Still working on the issue. The starter motor works just fine when power applied directly to it. There has to be some point where power is directed to both the tilt motor and the starter motor. Ground sounds like the logical solution, but all grounding seems to be good. I'm getting over 12 volts to the motor. Does the tilt relay have any influence on the starter motor?