Mixing synthetic and conventional oil 50/50??

[Airborne]

I have an interesting problem in a 4 stroke waverunner I own powered by the marine version of the yam. R1 engine. Basically I can only change 50% of the oil at a time when I do an oil change. Because there is no drain plug I have to suck the oil out of the pan with a pump. I dont know what kind of oil the dealer used so Im not sure what will happen if i put in synthetic in. I googled this but just got a bunch of internet voodoo. I'm assuming it will be fine and that there is currently yamalube in there right now.

[ducpainter]

Oils can be mixed...but I'm a bit confused.

If you're pumping the oil out, why can't you get all of it?

[Airborne]

Oils can be mixed...but I'm a bit confused.

If you're pumping the oil out, why can't you get all of it?

Just by way of design, you can only get the hose for the pump into a certain spot of the pan allowing only 2 1/2 quarts to be changed at a time. Yes, its silly.

[Airborne]

actually just found out the oil cap. for the r1 is just over 3qts so I am changing more than I thought. The idea of not being able to get it all still bothers me though.

[ducpainter]

actually just found out the oil cap. for the r1 is just over 3qts so I am changing more than I thought. The idea of not being able to get it all still bothers me though.

how about if you tip it a bit on the trailer...or jack the trailer up.

Ignore me if you're doing it in the water.