last night i am out cruising around just pulled my kids in the tube and all of the sudden the engine slows down and the alarm goes off so i putted into the harbor and tied to a mouring pulled the engine cover off and found the oil tank on the motor is at the low mark the engine is a 0x200 so i filled it up with the emergency switch and continued to the dock. how is this suppose to work properly?
W.T.F. BUZZERS
- Thread starter 24u2nv
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The engine should only reduce RPM and sound the alarm if both the engine mounted tank and the remote oil tank levels are low.
All three of the oil warning lights should be blinking on the gauge.
Once you have filled the engine mounted tank via the switch, the alarm should go off, but you should have the yellow oil warning light blinking until you add oil to the remote tank.
-- Tom
All three of the oil warning lights should be blinking on the gauge.
Once you have filled the engine mounted tank via the switch, the alarm should go off, but you should have the yellow oil warning light blinking until you add oil to the remote tank.
-- Tom
If your main tank is full, and hitting the switch actually pumps oil to the engine mounted tank, then it sounds like the oil level sensor inside the engine mounted tank is not working properly.
-- Tom
-- Tom
Just sent you an email with a PDF file that has additional troubleshooting info from Yamaha.
-- Tom
-- Tom
The engine will go into RPM reduction mode and the horn will sound when the main (engine mounted) tank is low on oil. The remote tank can be full or empty.
The main tank has a sensor with three switches in it. The top switch closes when the float rises to the top (full tank) to tell the oil pump in the remote tank to stop sending oil. The middle switch closes when the float drops down to the middle position to tell the oil pump to send oil from the remote tank to the main tank. The bottom switch closes when the float drops to the bottom position (almost out of oil) and this tells the computer to sound the alarm and activate the RPM reduction mode.
The sensor in the remote tank has a two position switch. The top position indicates that there is sufficient oil in the tank for normal operations. Oil will automatically be transferred from the remote tank to the main tank as needed. When the switch in the bottom position is activated (tank almost out of oil) the automatic oil transfer function is deactivated. To transfer oil you will have to use the manual transfer switch that is mounted on the engine. You get to fill the main tank twice using the manual transfer switch at which time the remote tank will be empty. If an operator did not head for home the first time the manual switch was used and then runs out of oil he deserves to be stranded.
If the main tank is empty you need to find out why it was not automatically refilled. The remote tank pump could have crapped out, the filter could be clogged, wiring and switches could be kaput and of course you simply could be low on oil.
The main tank has a sensor with three switches in it. The top switch closes when the float rises to the top (full tank) to tell the oil pump in the remote tank to stop sending oil. The middle switch closes when the float drops down to the middle position to tell the oil pump to send oil from the remote tank to the main tank. The bottom switch closes when the float drops to the bottom position (almost out of oil) and this tells the computer to sound the alarm and activate the RPM reduction mode.
The sensor in the remote tank has a two position switch. The top position indicates that there is sufficient oil in the tank for normal operations. Oil will automatically be transferred from the remote tank to the main tank as needed. When the switch in the bottom position is activated (tank almost out of oil) the automatic oil transfer function is deactivated. To transfer oil you will have to use the manual transfer switch that is mounted on the engine. You get to fill the main tank twice using the manual transfer switch at which time the remote tank will be empty. If an operator did not head for home the first time the manual switch was used and then runs out of oil he deserves to be stranded.
If the main tank is empty you need to find out why it was not automatically refilled. The remote tank pump could have crapped out, the filter could be clogged, wiring and switches could be kaput and of course you simply could be low on oil.
johnsw
Well-known member
I had low-oil alarm issues that turned out to be a really odd problem that I never really totally diagnosed. There are sensors in both tanks that work together to send the signal for more oil. Since the emergency switch works, your oil pump is OK. The service notes has the procedure to test the sensors. On Yamaha's prior to early 2000's, I believe the oil pump control module was a seperate unit. On mine (2004 150), they built it into the CDI. Signals from the sensors go to the control module to turn the pump on and off. But don't overlook the obvious such as oxidized connector contacts anywhere in between.
For my problem, when my alarm sounded I'd manually fill the main tank using the switch and it would run fine all day. Problem was when I tilted the engine back, overnight or until I got back to the boat, the oil in the main tank would siphon back down to the resevoir in the bilge. When the engine is started, the control unit automatically runs the oil pump for 90 seconds or until the main tank is full. Problem is, it's a low volume pump and would need more than 90 seconds to prime the now empty oil lines. Essentially, I'd start off with low oil and it would stay that way until the alarm sounded. My fix was to put a check valve in the oil line, since there was none and the Yamaha manual didn't show one. I had the boat 3 full seasons before this started happening, and I never really figured out why.
Just something to think about. Good luck.
John S.
For my problem, when my alarm sounded I'd manually fill the main tank using the switch and it would run fine all day. Problem was when I tilted the engine back, overnight or until I got back to the boat, the oil in the main tank would siphon back down to the resevoir in the bilge. When the engine is started, the control unit automatically runs the oil pump for 90 seconds or until the main tank is full. Problem is, it's a low volume pump and would need more than 90 seconds to prime the now empty oil lines. Essentially, I'd start off with low oil and it would stay that way until the alarm sounded. My fix was to put a check valve in the oil line, since there was none and the Yamaha manual didn't show one. I had the boat 3 full seasons before this started happening, and I never really figured out why.
Just something to think about. Good luck.
John S.
johnsw
Well-known member
Just a followup. Depending on the year engine, the control module would disable the oil pump if it sensed the engine was tilted up. This would prevent overflowing the oil tank if the key is turned on with the engine up. It would 'think' the engine is started and the pump would automatically run for 90 seconds. On later engines, the control was moved to the CDI and the timing signal tells the computer that the engine is in fact running and OK to enable the oil pump.
These systems are pretty reliable, so only go there as a last resort to fix the problem.
JS
These systems are pretty reliable, so only go there as a last resort to fix the problem.
JS
johnsw
Well-known member
I'd think that shutting the engine off (key to off) would reset the control module and/or computer when you restarted. When you trimmed down and restarted the engine, it should have cycled the oil pump normally. Tough to guess at what might have happened. Make sure your resevoir has enough oil in it. If it keeps happening, then you've got something going on. The 3 posiiton sensor in the main tank (mentioned above) should trigger an oil transfer when needed, but the pump will only be enabled if the sensor in the resevoir hasn't dropped too low (and engine trimmed down / running). Makes sense if you think about it. The pump will only run automatically if there's oil to pump. The emergency switch bypasses much of the automatic controls and sensors, essentially applying battery power directly to the pump to operate it.
JS
JS
fishdogmoose
Well-known member
Sounds like the main pump under the main oil reservior is not working, that is why you are running on the engine mounted tank. It will manually transfer but will cut out when running. I would get a yamaha manual & start trouble shooting before part swapping. :wink:
I had this happen on a 1990 yammy 225. Replaced the pump & problem was solved.
I had this happen on a 1990 yammy 225. Replaced the pump & problem was solved.
