200 HP Yamaha oil pump problem! Need HELP!!!

[captrich]

Hello,<br /><br />I have a problem with my Yamaha outboards and I am desperate for some help. My boat has been laid up for over three months and my mechanic just called this morning to inform me that he has given up on trying to fix the problem.<br /><br />I have twin 200 hp, 1992, counter rotating, oil injected outboards. One of the engines does not fill the engine oil tank automatically. It does fills off of the emergency switch. <br /><br />They have replaced electrical harnesses, interchanged the black boxes, and level sensors. They say everything checks out OK but it just doesn’t work!<br /><br />Can you give me anything that I might check? I am a fair troubleshooter myself and could find my way around the problem if I knew where to start. My guess is it is something simple that they just over looked. Any help would be appreciated.<br /><br />Thanks!

 

[petryshyn]

Re: 200 HP Yamaha oil pump problem! Need HELP!!!

Done some digging for ya.....<br /><br /> click me and read...

 

[seahorse5]

Re: 200 HP Yamaha oil pump problem! Need HELP!!!

disconnect the plug from the engine mounted tank and ground the blue/green (or brown) wire on the engine harness side, the pump should run. ground the blue/white (or white), and the pump should stop. If that works, the sending unit is bad, a faulty reed switch internally.<br /><br />If that doesn't work, check all the wiring, grounds, and connectors. If all are OK, then the controller has to be replaced.

 

[captrich]

Re: 200 HP Yamaha oil pump problem! Need HELP!!!

Thanks for the information. I will follow up on some of the suggestions this weekend. Let me also give you some more details as to the problem and what has already been checked out.<br /><br />Three months ago the boat was taken to the yard for three problems:<br />1. The oil problem<br />2. A problem with the alarms that would sound as soon as the battery power was turn on at the selector switch. This was resolved by replacing the wiring harness on the engine because of a bad connector. It was shorted across two lugs. Before the engine harness was replaced, the front harness from the key switch to the engine was replaced. <br />3. The engine trim indicator didn’t work on one engine. Now after the mechanics work, neither work! Minor problem but just for info.<br /><br />To try identifying and solving the oil problem a number of things were done. Such as:<br />1. The float switch was taken off the bad engine and put on the good one and the good engine still functioned OK.<br />2. The “black box” the computer brain was interchanged from bad engine to good engine and the good engine again functioned OK. <br /><br />Conclusion: no problem with the float switch or the black box?<br /><br />Also the emergency switch will fill the tank on the bad engine; conclusion, the pump pumps oil?<br /><br />Any thoughts or more info that you might want?<br /><br />I will stay in touch.<br /><br />Thanks again!

 

[seahorse5]

Re: 200 HP Yamaha oil pump problem! Need HELP!!!

Does your motor have the separate black box controller or is the emergency switch on the "brain box" on the back of the motor? If it's on the brain box, your tilt and trim sender has to be operational to tell the brain box that the motor is not tilted up.<br /><br />If it is the small black box, make sure it is not mounted upside down as there is a mercury switch inside of it to tell if the motor is tilted over 30 degrees.<br /><br />Make sure to check that the black wire going to the oil tank sensor has a good ground and that there is no wiring harness problems.

 

[captrich]

Re: 200 HP Yamaha oil pump problem! Need HELP!!!

Please respond to the message above under the same title. This has been posted twice.<br /><br />THANKS!