Mercury 90 sport jet

Dale002

Seaman Apprentice
Joined
Aug 12, 2006
Messages
39
I'm thinking about buying a regal rush jet boat with this engine (mercury sport jet 90)but it has one cylinder that the piston rings came apart and damage the cylinder wall as well as the head.
What other damage can I expect once the engine is torn down and what do you guys think it would cost to repair something like, plus what would cause the rings to come part?
 

lilmandavis

Chief Petty Officer
Joined
Mar 9, 2006
Messages
618
Re: Mercury 90 sport jet

look at buying new pistons and rings. oversized for the bore job it needs. $$$ for a powerhead unit.
 
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