Engine oil tank draining

[Gradywhite3535]

My 2003 yamaha txrb 2 stroke is having oil problems. Whenever the engine is put up the oil drains out of the engine oil tank. At the end of last season I had to goto the boat 2-3 hours before I was planning to go out in order for me to have a full oil tank. Thinking that the oil is draining and taking a really long time to fill up I'm thinking there may be something getting clogged. Has anyone had this happen or know whats going on? I'd appricate any help. Thanks

 

[boscoe99]

Re: Engine oil tank draining

You said that the oil drains out of the main oil tank. There are only two ways out. Either the plastic sump attached to the bottom of the tank is leaking or if this happens when the motor is tilted fully up, then the oil cap (part of the sensor) is not sealing and is allowing oil to come out of the top. This is not uncommon. Either case there will be signs of an oil spill in the engine pan. Either tie strap the cap to make a better seal or replace the sensor. You need to find out where the oil that leaves the tank is going.

It should not take long for the remote tank to refill the main tank. Provided that the pump is in good condition, the oil filter is not clogged or a transfer hose is not pinched. With a good system, the remote tank should be able to completely refill the main tank in less than three minutes.

 

[Gradywhite3535]

Re: Engine oil tank draining

I wrapped the engine oil tank with a cloth an tilted the engine up and there was no oil on the rag. Is there anyway it could go back down the oil line and back into the main oil reserve?

 

[Capt Ken]

Re: Engine oil tank draining

Is the engine smoking badly upon startup?

 

[Gradywhite3535]

Re: Engine oil tank draining

No it was not smoking. I'm new to boating and I need to find the problem because its a PITA to have to goto boat everytime hours before to turn it on. I have a feeling theres a clog in the strainers/filters or oil line. It may be causing it to run back down the lines and into the tank. I'm 90% sure it isnt leaking from the engine oil tank. The reserve tank is in a really hard place to get out but I will try n get the tank out and inspect. Could a clog cause this to happen?

 

[Gradywhite3535]

Re: Engine oil tank draining

Any help would be greatly apprciated

 

[boscoe99]

Re: Engine oil tank draining

Something is not adding up. You say the tank is draining but there is no evidence of oil anywhere. Should be some down the sides of the tank, in the engine pan or in the air intake silencer box.

You also report that it takes a long time for the oil tank to fill up. A good system should be able to completely refill the tank in about three minutes time, or less.

When was the last time the filter in the oil system was changed? Is it possible that you don't have a leak but that the main tank on the motor is not being refilled as it should be?

If you have Yamaha gauges, what are you seeing on the oil status part?

Regarding one of your questions, the main oil tank inlet is at the top of the tank. There is no way that oil can be siphoned out of the tank back to the remote tank.

Do this. Remove the plastic sump on the bottom of the main oil tank. Drain the oil into a clean container and add it to the remote tank. Clean, reattach and secure the plastic sump. Turn the key to just the oil position. The horn should sound, the tachomter icons should flash, and oil should start to flow from the remote tank to the main tank. The tank should be filled or mostly filled in about three minutes time.

 

[Gradywhite3535]

Re: Engine oil tank draining

Thanks for responding, When you say remove the sump ard you talking about the little nipple on the bottom of the motor oil tank? And yes the tank takes about 2-3 hours to fill up so there must be a clog in the filter. And like I said earlier I put a rag over the pump and nothing leaked onto the rag so I know the tank isn't leaking anywhere.