Help in determining why motor blew.

[cahetten]

I blew my 2000 200 hp Ficht. When the dealer put the new powerhead on and did the diagnostics they could not come up with a reason why the old one blew. The injector tested ok as did the oil pump and there were no fault codes in the computer. It looks like the #6 piston detonated before or after the rod broke. I think the piston went and then the rod broke. It doesn't appear there was a melt down. It almost looks like one side of the piston went or something failed on one side of the wrist pin as one side has a hunk of piston still hooked to the pin and the other side has nothing. The biggest piece of piston is about golf ball size. When the motor went I lost power and then the clattering started which to me would mean the rod didn't break first. I had to run it a little way to get to safe enough water where I could go on my electric. (Maybe 1 minute) Things got beat up in there from that. Since diagnostics and testing of componets after didn't find anything wrong can I assume that what the dealer is telling me is right? They say it was just part failure. Either the piston or rod broke. I don't want a costly repeat of a blown engine because of a bad componet not working. Any suggestions are greatly appreciated.

[ChampioNman]

You may have lost a locating pin on the piston which enabled the ring to spin and hooked a port and the rest is history. Once the Piston locked down the motor was still reving and something else had to give so the rod snaped.

[cahetten]

Thanks

[Sportwin]

It would be good insurance to replace the fuel injector on the #6 cylinder and put a BRP made oil lift pump on it.

Water pump should be replaced + thermostats and seals.

Timing verification should be performed both mechanical and electronic.

Clean oil tank out + new oil filter.

If fuel is suspect drain and start over.

Check boat fuel system for restriction with vacuum gauge.

Spec is no more than 4 in HG on vacuum test.