What more needs to be done

[boscoe99]

I have tried to create a diagram that depicts how the oil transfer system works on certain Yamaha motors.

It gets pretty busy. What more needs to be added (or removed) so that folks can learn about their system in order to do effective trouble shooting?

I have not addressed the need to check the wiring and connectors from the switch assemblies through various connectors back to the engine CDI/ECU/pump module. My thinking is that if someone does not know that this needs to be done then they are way over their heads and need to take the motor to a qualified mechanic.

What say yee?

[99yam40]

On the main tank switch assembly you have listed for the bottom switch when it closes, transfer is stopped and alarm sounds.

From I have read I thought it sent another signal to start transfer and sounds the alarm

[boscoe99]

On the main tank switch assembly you have listed for the bottom switch when it closes, transfer is stopped and alarm sounds.

From I have read I thought it sent another signal to start transfer and sounds the alarm

Good catch. Closure of the bottom switch has nothing to do with stopping the auto transfer of oil. It was the cessation of oil transfer in the first place that caused the main tank to be low on oil. I have updated the diagram. What in the hell was I thinking?

Closure of the bottom switch in the main tank sensor, with closure of the switch in the remote tank sensor, causes the pump to start running in only one event. That is the initial fill mode. When the key is turned on the pump will start running for a brief period of time, up to 180 seconds. Unless the engine mounted tank fills with oil before that amount of time has gone by. The diagram does not address that.

[rodbolt17]

and the various subgoups.

V4 used a different wiring color,v4 used a module.
V4 until 2001 used a mercury switch and the engine tank switch could be jumpered to turn on and off transfer.
V4 after 01 and any replacement modules used a green/white wire attaching to a pulser coil to allow/disallow transfer with engine off or on.

2.6L V6 until 1990 had a separate module and used a mercury switch in the module.

2.6L v6 1990-1995 intergrated the control module in the ECU,can be jumpered with key on engine off to turn transfer on and off. used the trim sender to also prohibit oil transfer when trimmed over about 60*
sender signal MUST be in range or auto transfer is prohibited.

1995 and up 2.6L v6 and ALL 3.1L v6.
the control module is in the ECU.
does NOT use any trim sender functions for any oil control.
other than key on engine off initial fiil the engine MUST be running for any automatic transfers,you can jumper the engine tank switch till the cows milk themselves with the engine off and nothing will happen.

its also why having the CORRECT digital tach makes it so easy to trouble shoot.
the tach will tell you which part of the system failed long before I pull the hood.

[boscoe99]

Whoa! No way that all of the various Yamaha configurations can be covered in just one diagram/document. Hell, even some Yam Master Technicians can't grasp it all.

I am just trying to give a broad brush conceptual view of how it works in most V4/V6 motors with remote oil tanks. What does what and when. Focused on the need to check that the switches open and close when they are supposed to and TO CHECK THE DAMN WIRING AND CONNECTORS.

And hopefully to get them to realize that a ground turns the pump on and off. Not the positive power. This concept apparently causes most folks heads to spin.

I agree with you on the need for a digital display tachometer. But, it seems that the folks that come here for free advice (too cheap to pay a mechanic) are too cheap to have a functioning Yamaha tachometer.

[Nautical]

. But, it seems that the folks that come here for free advice (too cheap to pay a mechanic) are too cheap to have a functioning Yamaha tachometer.

To say that is just not right! CHEAP IS RELATIVE ! Many come here to learn.

[boscoe99]

To say that is just not right! CHEAP IS RELATIVE ! Many come here to learn.

I suppose that a few want to learn. Good for them. But the majority I have my doubts about?

Why don't they read, listen and try what is offered to them? You can tell a man to check wiring/connectors and he comes back saying the switches are just fine. You ask him what is seen on his tachometer and he comes back to talk about a "short" in a ground wire.

Then there is the matter of test equipment being needed and the cheap bastards don't want to spend a dime. Particularly if it is a Yamaha test device at Yam pricing.

Seems to me that most don't want to learn. They seem to want to state their problem and be given a cheap, easy to implement, solution. That's the way that I see it any way. And God forbid they use the search function to read about what has been written about a hundred times.

[Nautical]

You have a point!

[TownsendsFJR1300]

To say that is just not right! CHEAP IS RELATIVE ! Many come here to learn.

+100^^^^

I don't have a two stroke but still try to learn about their oiling systems..

[99yam40]

owning a high dollar OB motor but not having the gauges to tell them what is going on with a motor when something sounds an alarm is a shame.
Just have to learn to troubleshoot properly and get the gauges and service manual

[boscoe99]

owning a high dollar OB motor but not having the gauges to tell them what is going on with a motor when something sounds an alarm is a shame.
Just have to learn to troubleshoot properly and get the gauges and service manual

That reminds me. Folks won't read the owner's manual and are loathe to purchase a service manual when they find they can't get a free copy.

[TownsendsFJR1300]

That reminds me. Folks won't read the owner's manual and are loathe to purchase a service manual when they find they can't get a free copy.

Many of their questions can be answered with JUST the owners manual too...

[greasyshaft]

99yam can learn HTML5, CSS and wee bit of javascript to make a web based interactive animation of the system.

DO EET!

[rodbolt17]

***
reminds me of most techs and ALL at kennasw.
they simply cant visualize everything happens.
I can think in 3d,working on 4d.

\its a stupidly simple system that uses 4 SWITCH;S.

yes virgina its that fuuuking stupidly simple.

the master techs at kennasaw now simply cannot help you with any precision blend or most tiny mite 4 stroke issues.
we figure them out in the field.
but dang if I will call them back and tell them how to do it.

kinda like Boscoe bustin my chops on the oil control, if you don't know it your not a master tech.
don't care what test you passed.
most the phone techs, and that gone, could not trouble shoot there arse out of a wet paper bag.

[TownsendsFJR1300]

Got the popcorn!!!