5 quarts of oil in 10 hours?

[da.bell]

Check to see if there is oil in the manifolds and the exhaust outlets. If Tanner's suggestion that the oil left out the exhaust outlets, then there will be an oily residue.

[Tanner]

I don't see how those pictures prove anything, other than you have a smashed rod that seems to be covered in oil in the pan. Yes a broken rod most the time is from lack of oil or a spun bearing. Also condensation in the oil can cause it to lose viscosity.... which is another reason to change the oil every year. But point blank.... failures happen!

The question here is where did your oil go? If there is really none in the bottom of the boat, then do what DaBell says, and check the exhaust for oil residue. When you shatter the rod like that, the piston CAN cause cylinder damage... thus enlarging the cylinder slightly. You have now essentially lost the oil ring. The motor CAN continue to turn w/o that cylinder, although alot of times they will seize. You now have a path for the oil to make it's way through out the exhaust system. Along the way, metal shavings went into the rest of the motor causing the oil pump to fail and then I would venture to guess the motor seized.

Although dumping ALL the oil is rare from this case, it does happen. One thing about boats is the oil will drop into the hull if the pan is punctured and we'll find it there. If you don't, then it had to go somewhere... or you didn't have any to begin with. So pull your dealer aside and ask them where they believe the oil went, and do they truly think your boat used 5qts in 10 hours, and if they're other boats do that. MP states their motors could use 5 QT's in 10 hours.... I call BS on this one. That's absurd and I it's their way of protecting themselves. Although yes, technically you should check the oil before every outing.

All that being said... aren't you out of warranty?

[Tanner]

I just now noticed you said you had 3 rods fail!

That's where MP is giving you hassle. That's pretty unusual. If a true failure occurs, it's usually only one rod. Not 3. But I guess it's possible to think that the rods came from the same batch and therefore made w/ the same defect. In all honesty I have seen multiple rods fail, but it was on very high HP motors... never on a stock motor. But I guess one failure could lead to the others once stuff started flying around.

[22veguy]

Are you sure the oil hasn't run forward in the bildge and you just can't see it? On our 22Ve , there can be alot of water in the bildge, but you won't see it or drain it until you raise the nose WAY up, or you're on the launch ramp etc.

[chpthril]

One broken rod is just a freak failure - poorly machined crank journal, bearing, or rod, but 3 would almost have to be due to lack of oil. Man, i hate to say it, but I dont see broken rods pumping 5 qts of oil out the exhaust valves in the seconds between these letting loose and when the engine quite or was shut down. The oil in the pan is not under pressure. The oil level, even when normal, is still well below the piston skirts and cylinder walls. Even a dropped valve that blows a huge hole in a piston will not suck an engine dry. In many cases, these engines will continue to run until shut down. You will get some blow-by that will burn un the exhaust, but not 5 qts. I cant say where the oil went, but those rods failed due to oil starvation. The discoloration and scoring indicate that these bearings were running dry till the seized and the rods broke.

[da.bell]

When the oil was changed, who changed the oil? If the dealer did, did the dealer put oil into the engine or forgot about adding the oil? IDK, but I agree, 5 qts of oil is a ton of oil and none can be found. 22Veguy has a good suggestion, have the dealer raise the bow of the boat and watch for oil coming out the transom plug hole.

[Timmy!]

Did the block crack or something and dump the oil into the cylinders? Oil won't compress and if it filled 3 cylinders full, all 3 of those rods are going!