I have a 84 yamaha waverunner wr500d I need a diaghram for the cooling system all the way to motor to the exit

SOURCE: 2006 yamaha waverunner wont idle

what is it idle at? how much? remove your seat check air filter if is black oily remove it and see if that fixes your problem you may want to change your spark plugs as well # one cylinder may be starting to foul the new yamahas are the worst for fouling plugs use a cr8eb instead of the cr9eb the 8s are hotter and work better try those and let me know thank you

SOURCE: yamaha waverunner excessive smoke

White smoke means coolant in the combustion chamber. Most likely a blown head gasket. You will have to tear the engine apart to be sure.

SOURCE: i have a 2001 yamaha waverunner and the gauges stop working

I have a 2001 waverunner and it stoped runing in the water . Now it will turn over but won't start

SOURCE: how do I reset the code on a yamaha waverunner

How do I reset the code on dash board 99 yamaha waverunner 800?

SOURCE: 1989 yamaha waverunner. I purchased

Did you get any instructions from the previous owner? If it's a 4 stroke waverunner there will be a dipstick on the engine block, but I'm guessing it's probably a 2 stroke engine because most watercraft used 2 stroke motors clear through the 1990's. The oil will be mixed with the gasoline when you fill it, bottles of 2 stroke oil can be purchased at most stores that carry oil. Your waverunner can be mixed at 50:1, which equals out to be 2.6 oz of oil per gallon of gasoline. On a 2 stroke engine the engine gets lubrication from the oil mixed with fuel and will burn up fast if straight gasoline is used. Let me know if you have any troubles, but try to get ahold of the previous owner to get some more info.
Daniel