few hours into ownership - dead ski

[madaneerg]

Bought a 2005 GTI with a neighbor. Literally have not been on the thing for an hour.

My co-owner had it out and complained that it lost power (while full throttle) until it stalled, then it would not turn over. He was towed in.

Seadoo oil was topped off, start and all wires look great and secure. I bought a new battery as well.

loud click heard when you try to turn it over.

Took it over to a local shop and he quicky diagnosed it as having a stripped main gear or stripped rotary gear & stating that it needs a new engine. One of the plug gaps was closed.

How does this breakdown (stripped main gear) occur?

Trying to figure out what happened. Any help will be appreciated.

 

[madaneerg]

ski has total of about 30 hours on it and was very well cared for. I bought from a friend and have known about it since it was new.

 

[nswillin]

Not sure about the gear but what happened to your plug lies the problem. The ring on that piston probably detonated, broke off, and destroyed your piston and head. If you pull the head you'll see that the piston looks like the surface of the moon.

 

[madaneerg]

Thanks nswillin, can you tell me what may have caused this to happen?



"The ring on that piston probably detonated, broke off, and destroyed your piston and head. If you pull the head you'll see that the piston looks like the surface of the moon."

 

[popasodatastie]

Detonation

When unburned fuel/air mixture beyond the boundary of the flame front is subjected to a combination of heat and pressure for a certain duration. It usually is cause by low octane fuel or bad gas or even not getting enough air/fuel. Or even if the engine being out of timing.