oil not transferring to engine - 150 yam 2000

[glennhoward]

my 150 txry 2 stroke year 2000 main oil tank is not transferring oil to the
engine sub-tank. i have replaced the engine tank mounted float switch/harness,
insured the trim indicator is working correctly and down, checked the two fuses in the key switch wiring harness, replaced the main oil tank system completely checking the harness for conductivity, cleaned every connector with contact cleaner all with no success. engine runs great until the engine mounted oil tank level reaches lower level then the engine will idle only until i flip and hold the emergency switch located near the cdi which activates main oil tank pump oil to the engine sub-tank. i don't know what else to try. could my cdi be kuput (hope not, this part costs over $1,000) HELP. glenn

 

[cousinabe]

Re: oil not transferring to engine - 150 yam 2000

have you tested the remote oil tank float switch?

 

[glennhoward]

Re: oil not transferring to engine - 150 yam 2000

i replaced it with a new one with no success.
how would i test it. i have testing meters.

 

[cousinabe]

Re: oil not transferring to engine - 150 yam 2000

your precision blend system has several things going on at once.
the engine tank contains 3 switchs and a water trap.
the top switch,blue/white to black shuts off the automatic transfer,the middle switch,blue/green to black turns on the auto transfer, the bottom blue/red to black sets the audible for low oil and sets the engine into RPM reduction.

now on to the remote tank.
it contains a simple on off switch.
if the tank has enough oil for auto transfer the switch is closed(continuity) if not or the switch is bad auto transfer is inhibited but emergency still works.
at key on the brown wire at the remote tank is 12V+ the blue is the ground path and is completed by either the ECU based on switch positions(commands) from the engine tank or via the toggle switch for emergency transfer.
a clogged filter at the remote tank may allow oil to be consumed faster from the engine tank than the transfer pump can supply.

quick checks
at the remote connector check black(harness side) to engine block for continuity, check continuity black to black red (switch side) check 12V to block key on engine off.
engine tank, unplug the oil tank connector, check oil tank side with tank full blue/white to black,continuity, cut the tie strap and remove the water trap drain the oil into a clean container, when the level goes below the lower tank mark check the blue green to black, should have continuity.
another check, engine tank low, remote full,key on,the transfer pump will run 180 seconds. in that time frame check the blue pump wire to ground for continuity.
remember if the black and black/red wires have lost contact the ECU "sees" it as low remote level and auto transfer is inhibited.
NEVER remove the engine tank screen/switch assy without first DRAINING the engine tank and ALWAYS retrieve and replace the screen to tank seal.
failure to follow this can lead to catastrophic engine failure.

It may seem intimidating, but it's not. Good luck and post your results!

 

[glennhoward]

Re: oil not transferring to engine - 150 yam 2000

cousinabe, thanks for all this info. i am on a fishing trip on the swannee river in north florida and can't wait to get back home in key largo to put your advice
to work. will let you know on tuesday how i did. best, glenn

 

[Tommylex]

Re: oil not transferring to engine - 150 yam 2000

I just posted something similar to your post here however we have two different motors. I am curious to see what you found.

 

[glennhoward]

Re: oil not transferring to engine - 150 yam 2000

although we have tried to follow all of cousinabe's suggestions, we are not
sure we did. some we didn't understand as we are technically challenged.
we have basically separated every component and checked either voltage or continuity and connections and found nothing wrong however after about an hour checking we turned the key on and the boat mounted tank started to pumping. we let it run for about a minute and turned the key off thinking the problem was fixed. we turned the key back on and nothing. we wiggled the boat tank wires thinking that was the last area we working and possibly found a short but with no such luck.
we can transfer oil from the boat mounted tank to the engine mounted tank
using the emergency switch. we have emptied and filled the engine mounted tank and tried everything with no success. we understand the boat tank must have oil or the feed back system will cut off transfer. the tank is 3/4 filled and historically it worked with only one inch of oil in it. help.

 

[glennhoward]

Re: oil not transferring to engine - 150 yam 2000

so far, this is what we are thinking.
since the emergency switch will turn on the oil pump and it is a ground
completion only, the pump must be getting 12v from the key switch
brown wire. if this is correct, the problem must be that the oil pump
is not getting a negative from either the engine mounted oil float switch
or the connections are broken/dirty or the wiring harness from the boat
oil tank to the harness coming out of the ecu.
we have tested the engine mounted oil tank float switch per cousinabe's
suggestion and found no problems, we have cleaned all connections,
we have tested the harness (boat tank to ecu lead - flat black - four wires)
with the ohm meter and found it to be working properly.
today we are going to test the negative wiring from the engine mounted
oil float switch to the boat mounted oil tank connector.
this is driving me nuts.
glenn

 

[glennhoward]

Re: oil not transferring to engine - 150 yam 2000

cousinabe
problem might be fixed !
after testing and taking all the connections apart many times, we
now have the oil pump automatically going on when the key switch is
turned on. we do not know if the engine tank will automatically fill yet.
we are going to launch on saturday morning and fine out.
will let you know.
glenn
p.s. we removed the engine oil tank screen several times and found the
spongy o-ring out of position. we replaced it with a new one (52 cents)
cheapest yamaha part i ever bought !
p.s.s.
i find it really difficult to find my thread. anyone else having trouble.

 

[rodbolt]

Re: oil not transferring to engine - 150 yam 2000

thanks to cousin abe for reposting my thread .
however I also say YOU MUST drain the engine tank BEFORE removing the screen assy or any debris in the tank will instantly drain into the pump intake and damage the pump or check valves and can cause catastrophic engine failure.
that "spongy" thing is called a seal.
it seals between the screen and the tank bottom and MUST be replaced any time the screen is removed.
wont be the first engine ever blown up due to the seal getting shoved into the pump intake hose when the screen was reinstalled either.
the oil transfer pump ground path is controled by either the manual switch OR the ECU, has absolutly nothing to do with the remote switch or engine tank switchs.
the ground path for the normally closed remote tank switch signals the ECU that enough oil remains for automatic transfer. when it opens,or a wire breaks, you will get a center bar,arrow or yellow lamp on the tach and no automatic transfer.
if the engine tank is low and the ECU "sees" enough oil in the remote for transfer you will get 3 bars,arrows, flashing and an audible and the transfer pump will run for 180 seconds. tank should fill and pump shut off prior to time out or your remote tank filter may be plugged/restricted.
that is the ONLY time your pump should run with key on engine off.
other than that the engine MUST be running for automatic transfer on 2.6L V motors from 1996 to presant.
hunt around using the forum search function and you will see I have many posts on precision blend and how it works.

 

[cousinabe]

Re: oil not transferring to engine - 150 yam 2000

Rodbolt,
I have mastered the forum search function and copy/paste keys

Thanks for posting all of the information on this site. The knowledge you have and share is invaluable and great to read for techie troubleshooters!

Stay sharp!

 

[rodbolt]

Re: oil not transferring to engine - 150 yam 2000

cousinabe
then why dont you correct my typos so I will look itelligent ?
dont mind sharing what little I know, cant take it with me and it would be a waste to learn and not share.

 

[glennhoward]

Re: oil not transferring to engine - 150 yam 2000

thanks to cousinable and rodbolt for helping me out.
because of your advice about the sponge o-ring in CAPS. i did
drain the engine mounted oil tank and install a new o-ring.
we drove the boat around key largo yesterday, ran up the rpm's
to check it out and the oil is pumping from the boat mounted tank
to the engine tank just fine. problem is; i didn't find anything wrong.
we just kept taking things apart, checking everything we could and
putting everything back. maybe i had a bad connector but its working
now. any advise is always appreciated.
glenn, key largo

 

[glennhoward]

Re: oil not transferring to engine - 150 yam 2000

well after i checked every float switch and connection and found nothing amiss i removed the boat tank mounted inline oil filter. it was 95 percent clogged. why, i don't know. i didn't check this originally because i replaced
the tank, pump, hose and wiring about three months ago and thought it could not be the problem. boy, was i wrong. as the symtoms can be desceiving i thought my problem had something to do with float switches
or the wiring connections. i cleaned out the filter and the system worked
perfectly. to test this system when i first had the problem, i believe i should have removed the oil tube where it connects to the engine mounted oil tank,
turned the key on and tested the volume of oil coming out. when it didn't
(in my case) i then should have back tracked the issue to the boat mounted
tank. (i think)
best to all , i really appreciate this forum.
glenn, key largo

 

[rodbolt]

Re: oil not transferring to engine - 150 yam 2000

cousin pointed that oft overlooked filter out.
what he did not gig you on is the trim switch, on US market motors, from 1996 and up V6 the trim switch is NOT used for ANY oil related functions.
also for automatic transfer to occur, unless the engine tank is low and the remote is full, auto transfer wont occur unless the engine is running on a 96 and up V6.
always look at your digital meter and observe the bars,
3 bars flasing means most likly a clogged filter.

 

[t_man]

Re: oil not transferring to engine - 150 yam 2000

Hey, can I chime in with a quick question ? I too experienced almost the same problems and found my filter clogged; the whole screen, sponge thing mention on the engine mounted tank has me concerned; I took the top of the engine mounted tank, and partially removed the cylindrical plastic with screen on it; when I would manuall fill the engine tank and run it, it used the oil fine, but worried I might have messed something up; does anyone have a picture or schematic that shows what this is ??? and what do I need to do

Thanks

 

[Big Keepers]

Oil not transferring to engine - 1985 200hp Yamaha

Oil not transferring to engine - 1985 200hp Yamaha

Ditto on what T-Man is asking. I had issues over Fourth of July weekend with my main engine tank not filling. The override switch will not operate the remote tank pump and judging by its totally corroded condition and the fact that I have +12 on the red, brown and good ground to the black I am guessing that the pump is the problem if not part of. I had to remove the sensor from the boat mounted tank to fill it with oil twice during my Saturday running around. Where is this spongy screen and whatnot that is being described?

I plan on taking the remote tank apart, cleaning out the inside and filters plus most likely replacing the pump on the remote tank. What maintenance can I do on the main engine tank? I'd like to clean that crap out as well. Also I read that if you drain the main engine tank you have to bleed air out of the oil pump below the tank. What is the deal with that?

Thanks to Rodbolt in advance.

P.S. Notice that my engine is a 1985 and the tilt switch works regardless of whether or not it will affect the oil transfer.

 

[t_man]

Re: oil not transferring to engine - 150 yam 2000

Anyone ??

 

[Big Keepers]

Re: oil not transferring to engine - 150 yam 2000

T-Man judging by what I've read on Precision Blend using the search, it appears that only the 1990 and up Yamaha's have the screen in the engine mounted (main) tank. The other larger tank that stores excess oil to be transferred is usually called the remote tank and the smaller one bolted to the powerhead is called the main tank. The remote tank has a filter screen in it as well that sometimes needs to be cleaned. I guess older two cycle oil can get gummy and sludgy a bit which clogs stuff hence all the filters and sponges.

Still waiting for confirmation though.