1990 Yamaha 225ETLD oil pump disconnected

[Phillips_211]

Hey guys new to the forum. Just recently picked up a 1990 Yamaha 225 ETLD. Motor runs a little rough cause it been sitting awhile but that is to be expected. My only concern with the motor is that the guy that owned it before me unhooked the precision blend. He disconnected the oil line running from the remote tank to the oil tank on the motor, and looped the oil tank line that connects to the oil pump so that the oil would stay in the tank without setting off the alarm. So my main question is with no oil running to the oil pump does that mean its probly trashed? The guy said he only unhooked it because he didn't want the oil pump to fail and blow the motor up. I really need the precision blend to work because I will be running a kicker motor off the same fuel tank and its a 4 stroke.

[99yam40]

sounds like the oil pump was pumping, but just pumping back into the tank

[Phillips_211]

No there is no oil line going to the oil pump. The line that is suppose to go to the oil pump is just looped back into the oil tank.

[Phillips_211]

Picture of oil pump

IMG_0556.jpg

[Phillips_211]

Close up and of oil tank

IMG_0612.jpg

[pstephens46]

This is a definite case of needing the correct service manual. No doubt you can get the PB back in service. Seems like a good system. Never understood why people want to bypass and premix...

[Phillips_211]

This is a definite case of needing the correct service manual. No doubt you can get the PB back in service. Seems like a good system. Never understood why people want to bypass and premix...

I passed on several motors before I bought this one cause the other had the oil system taken completely out. Do you know where I can get a service manual for this motor?

[99yam40]

any local Yamaha dealer should be able to find the correct service manual part # .
They should be able to get you one, or if they will give you the part # you can do a search on the web for that #.

I thought the oil pump did not have a hose feeding oil to it, it picks up oil from inside the tank and then put it out thru hoses.
but if that is true about the pump having a hose feeding oil and your motor has been running without oil to lubricate the pump and its drive, and the oil pump drive shaft has not been removed, then it is very possible that the oil pump and/or the crankshaft could be damaged

[Phillips_211]

any local Yamaha dealer should be able to find the correct service manual part # .
They should be able to get you one, or if they will give you the part # you can do a search on the web for that #.

I thought the oil pump did not have a hose feeding oil to it, it picks up oil from inside the tank and then put it out thru hoses.
but if that is true about the pump having a hose feeding oil and your motor has been running without oil to lubricate the pump and its drive, and the oil pump drive shaft has not been removed, then it is very possible that the oil pump and/or the crankshaft could be damaged

well now you have me 2nd guessing myself. I just figured the oil was pulled from the bottom of the oil tank on the motor straight to the oil pump. if the oil pump doesn't have oil going to it, how would it mess up the crank shaft?

[Phillips_211]

Here is a picture of the oil pump. If you look at the left side of the picture you will see a nipple that doesn't have a line going to it. I assumed this is where the oil line was suppose to go.

IMG_0613.jpg

[Phillips_211]

[ATTACH]3408[/ATTACH]
[ATTACH]3409[/ATTACH]
[ATTACH]3410[/ATTACH]

[TownsendsFJR1300]

Seems you have TWO oil pumps! One mounted on the engine, another attached to the large, remote oil tank.

Does this help?:

Oil tanks, part #9 & 23:
1990 225ETLD Yamaha Outboard OIL TANK Diagram and Parts


Oil injection pump, part #1:
1990 225ETLD Yamaha Outboard OIL PUMP Diagram and Parts




.

[Phillips_211]

Yes there are two oil pumps, one pumps oil from remote tank into small tank on the motor. The pump I am talking about is on the motor.

[TownsendsFJR1300]

You could hook it back up properly, run pre-mix for a bit while monitoring the tanks oil level.

That it is indeed working and pumping oil.

[99yam40]

well now you have me 2nd guessing myself. I just figured the oil was pulled from the bottom of the oil tank on the motor straight to the oil pump. if the oil pump doesn't have oil going to it, how would it mess up the crank shaft?

the oil pump is geared to the crankshaft, there is a drive shaft from the oil pump to the crank from what I have read.
if the oil pump is turning and not pumping oil it will eventually lock up from lack of lube and damage the drive shaft and crank gear if the drive shaft is not removed when eliminating the oil injection.
at least that is what i think i happens.

looking at what Scott posted it seems the hose from the float /level gauge switch unit with a strainer to keep junk out of the oil pump is hooked to the sump drain where you drain the water /crud out of the very bottom of the tank when needed