Hey Rodbolt,Can get pump running with emerg. switch now but not automatic.

[P2]

Hi there. I Have an issue with the oil transfer from the remote tank to the engine main tank. 1990 200 etxd. I have searched the forums and found very helpfull info. Did the regular checks/tests of sensors and found the trim/tilt sensor out of spec. Thought I had her licked till I just recieved and installed it and oil transfer still doesnt happen. Three lcd gauge pack works fine from the remote,Can run the pump from the remote ( using 12 volt jumper.)but can only get Low level audiable from main tank. Can not jump engine harness to start pump. And emergency by-pass switch will not initiate pump either. The wiring diagram I have here realy sucks. If anyone has some tips on which Wires I should test first that would be great. Thanks

 

[woody66912]

Re: Remote oil transfer on 1990 yamaha 200etxd

Re: Remote oil transfer on 1990 yamaha 200etxd

seen this before the sensor in tank failed the way this is wired if that fails it wont pump even with oil transfer switch.

 

[rodbolt]

Re: Remote oil transfer on 1990 yamaha 200etxd

Re: Remote oil transfer on 1990 yamaha 200etxd

above reply is wrong
yamaha 2.6LV6 from 90-95 will manually transfer regaurdless of any sensors or switches.
if the remote tank switch opens the yellow or middle bar will activate on the tach and automatic transfer wont occur but manual will. there is enough oil remaining in the remote tank for about two manual refills of the engine tank.
on 90-95 models if the trim sender is out of spec it can inhibit autom,atic transfer but manual still works.
with key on engine off test for 12v at the brown transfer pump wire. brown wire is hot anytime the key is on, ground path is made in the engine ECU or the manual switch.
what your describing is a wire failutre, either the ground path,blue wire or the 12v supply ,brown wire has failed.
there is a splice just behind the engine 10 pin connector that can fail, its where the yellow key on power changes to brown for the transfer pump.
you need to verify 12v at the pump with key on engine off, then do a continuity test between the pump blue wire and the engine block with the manual switch activated.
if you pull the switch assy out of the engine tank make sure the tank is drained FIRST and make sure you retrive and REPLACE the seal between the filter and the tank bottom otherwise VERY VERY bad things can occur.
precision blend is a very simple reliable setup that most techs cant seem to deal with. there are several things going on at once but if you study the system, do a forum search, you will see its very very simple.

 

[woody66912]

Re: Remote oil transfer on 1990 yamaha 200etxd

Re: Remote oil transfer on 1990 yamaha 200etxd

thats a better answer than i got from yamaha tech service going to print and put in tool box.you never stop learning

 

[P2]

Re: Remote oil transfer on 1990 yamaha 200etxd

Re: Remote oil transfer on 1990 yamaha 200etxd

Thanks. Rodbolt. I have followed most of these instructions from a previous post you helped with. Every thing was easy to follow. With the remote I did test and Had Green led, jumped and got yellow np. I will be doing the additional tests you suggested. thanks again.

 

[rodbolt]

Re: Remote oil transfer on 1990 yamaha 200etxd

Re: Remote oil transfer on 1990 yamaha 200etxd

yep, the day I quit learning is the day I get planted.
I have been doing this stuff about 30 years or so now.
over the years you can break up precision blend into about 3 basic setups, V4from 84 or so till about 04,V6 2.6L from about 84 to 89,V62.6L from 90-95 and V76 used on HPDI and 3.1L engines.
about 04 and later V4 and all the replacement oil control modules eliminated the mercury switch and now use a tap wire off the pulser assy to tell the module if the engine is running or not.
but yes, I have spent hours chasing issues with saltwater used engines and the odd electrical failures they can cause.
the multimeter and the ability to understand what its telling you is impearative.
luckily the ability to spell isnt
but always remember, if you remove the screen assy on 90 and up V stuff DRAIN THE TANK FIRST AND ALWAYS RETREIVE AND REPLACE THE SEAL.

 

[P2]

Re: Remote oil transfer on 1990 yamaha 200etxd

Re: Remote oil transfer on 1990 yamaha 200etxd

Thanks Rodbolt for the tips but I think we have to go deeper. I tested the brown wire at the remote tank connector and have 12v with power on/engine off. I also happened to note there was approx. 6v on the blue to ground also.
With power off I was able to get continuity on blue to engine ground when emergency swith was closed.. I used to be able to hear the oil pump come on for a few seconds when power was first turned on but I dont get that either.
thanks again for your help.
I do have to admit to pulling the engine sensor while there was a little oil in the tank though. We were 20 miles out and didnt see anyother way at the time to get oil in and get home. The gasket did stay with the sensor and am confident it is in place. Hope it will be ok? Thanks Rodbolt.

 

[tyjo]

Re: Remote oil transfer on 1990 yamaha 200etxd

Re: Remote oil transfer on 1990 yamaha 200etxd

I have an '02 yamaha 150 that is doing the same thing. it sounds like the system and wiring tests for it would be the same? I also have to admit that when I was out in the water and the alarm went off, i had no way to get oil into the motor side tank without taking the cap off and filling it. I hope I didn't lose something or break it more.

I have read this "manual" fill item several times. Can someone tell me how to do that in the meantime so I can stay afloat?

Thanks

 

[rodbolt]

Re: Remote oil transfer on 1990 yamaha 200etxd

Re: Remote oil transfer on 1990 yamaha 200etxd

when you did the voltage test at the pump brown wire did you go from the block to the brown lead AND toggle the manual switch with the key on?
you should see a volt or so drop but never below 11V.
another method is between the battery positive and the pump brown wire,toggle it and voltage should read less than .5 volts.
this method can be used on any 12v circuit, what your testing is the ability of the wire to carry a load.
when you tested the brown wire did you toggle the manual switch? with 12V on the brown and 6 on the blue either the pump is dropping 6 volts or the supply connection is failing.
usually its the splice in the 10 pin harness just aft of the engine side connector, its where they tapped into the key on yellow ign wire with the brown lead heading to the pump or its the tank harness connector at either the tank or the engine.
this is where knowing what your meter is trying to tell you.
voltage is simply a measure of electricl pressure.
think of it as a garden hose, you have 12 PSI behind the nozzle but the supply valve is almost off, with the nozzle closed you have your 12 PSI but no water(current) flow, open the nozzle ( electrical load) and PSI will fall to zero,close the nozzle and it pops back up to 12 psi.
the mostly closed supply valve is acting like a coroded connection as it still has 12 psi on its supply side.
we will call the engine side of the engine end of the tank harness A, the tank side of the tank end we will call B.
if you back probe the engine side and the tank side we are now going to tyest the ability of A to B to flow current.
with no load you should read 0 V, when loaded you should read less than .03 Volts.
the electrical potential between point A and B if all connections are good should be roughly the same under a load, if not you have a wire or connection failure.
same will work between the positive power take off and the pump brown wire with the circuit loaded( blue wire from the pump grounded) if you read over .5 volts find the supply side failure, once you eliminate the supply to the pump simply move the leads to the pump ble to ground and load it. no more than .03 V is allowable on the ground circuit.
its a very very simple system, quit beating yourself

 

[P2]

Re: Remote oil transfer on 1990 yamaha 200etxd

Re: Remote oil transfer on 1990 yamaha 200etxd

Small update here. I did not have much time here tonight so I went straight to the yellow/brown connection at the 10 pin connector. You were so right with the corrosion on this crimp. Crimped back together and sealed and power'd up. No transfer. Quick test of ground ( both engine then boat )to brown at remote tank and got 8 volts. No time to do other tests and will do them thursday aft work. I also saw another splice at that point,Will it be just as bad? Thanks again for all the help Rodbolt.

 

[P2]

Re: Remote oil transfer on 1990 yamaha 200etxd

Re: Remote oil transfer on 1990 yamaha 200etxd

Ok. success. Thanks for your help and patience Rodbolt. Repaired yellow to brown splice, repaired blue splice checked two more. Was try'n to put a load on wires when a puff of smoke came off the brown midway from splice to connector. Wire is shot to connector.. I jumped a hot from a fused battery and activated emergency fill switch and pump activated. Will have to get another connector and splice it in. Looks good anyhow. Thanks again.

 

[P2]

Re: Remote oil transfer on 1990 yamaha 200etxd

Re: Remote oil transfer on 1990 yamaha 200etxd

Just did a double check on the pump operation. Pump now comes on for a few seconds on power up and am able to pump up tank from the emergency switch. I do a test for engine oil sensor and does not pump. Only with emergency switch. Can activate low level alarm but not pump. Back to the books . LOl. Going away in a cpl days, hope I get it soon.