Seadoo 717, is this cylinder usable?

[WaterJet]

Hi all, picked up a cheap ‘96 SPX and am now in the process of working out whether the engine is worth fixing... Do you think this cylinder can still be used? You can see the lower section of the head bolt thread has cracked off. This is on one of the 6 threads.

 

[mikidymac]

No, I would source some clean used 720 cylinders. Possibly from Westside Powersports Seadoo.

 

[WaterJet]

That sounds like a good option. Thanks. Do you think it would be a decent upgrade to take the 657 engine and pump out of my 93XP and put it in the 1996 SPX X4. Would the X4 handling make it worth doing?