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

captrich Hello,

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.

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.

They have replaced electrical harnesses, interchanged the black boxes, and level sensors. They say everything checks out OK but it just doesn’t work!

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.

Thanks!
2002-07-03
clanton I don`t work on yamaha, so my opinon don`t mean much. I think the remote tank has an electric pump to move the oil to the tank on the engine, a service manual with wireing diaphram should show the power supply and control for the pump, may be from power pack or computer on engine. 2002-07-03
captrich 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.

Three months ago the boat was taken to the yard for three prob
2002-07-04
captrich OK guys,

I just spent about six hours finding out some more information on the problem. I would like to spend another six telling you how bad Yamaha’s are wired. (Hundreds of splices hidden under electrical tape, a number of wires that go in on
2002-07-05
seahorse5 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. 2002-07-06
captrich I want to first “Thank” all those that helped cheer me on and assisted me in solving this problem. If you all will drop me a line at my e-mail address, I would like to thank you individually plus stay in touch. [edited]
The f
2002-07-16

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