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OMC 4.3L cobra with 2 burnt pistons

Jeff_48

New member
I have a 1993 four winns with a blown engine. It is a 4.3l omc cobra engine. If I wanted to replace the engine with a used or remanufactured, what do I need to know. Can I put any 4.3l engine in?
 
Ayuh,.... The 4.3l went through alota changes over the years,.....

The Easiest swap is another 1993,.....

Myself, I'd go for a post-96 to get the Vortec heads, then adapt to the changes where necessary,.....

Btw,...... Fix yer boat's fuel system,...... #1 cause of burnt pistons is a Lean condition,.....
 
I have a 1993 four winns with a blown engine. It is a 4.3l omc cobra engine. If I wanted to replace the engine with a used or remanufactured, what do I need to know. Can I put any 4.3l engine in?

First............. find out what caused the 2 burned pistons.
If ignition system related, and/or if fuel delivery system related (as in a lean condition), and if you were to use these same components on the replacement engine, you could end up with the same issue!

By the way, burned piston decks are typically a result of Detonation Damage.
(Detonation and Pre-Ignition are two entirely different phenomena)




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