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Buddy bought a used 454 merc motor and is planning on putting in his jet boat 21ultra (i didnt recomend this)
motor came pretty much complete but no flex plate and harmonic balancer. All my stuff is eaither internally balanced or all parts go to the balance shop together. What should he do i have no idea about weather merc motors are internally balanced or externally balanced?

No minute like last minute he wants to put it in the boat tonight everyones .02 requested lol
 

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Buddy bought a used 454 merc motor and is planning on putting in his jet boat 21ultra (i didnt recomend this) motor came pretty much complete but no flex plate and harmonic balancer. All my stuff is eaither internally balanced or all parts go to the balance shop together. What should he do i have no idea about weather merc motors are internally balanced or externally balanced? No minute like last minute he wants to put it in the boat tonight everyones .02 requested lol
I "personally" thought all stock 454's were externally balanced!...one way to find out is to search the block #'s & head #'s...that should tell you what year it is etc :)...just my .02 cents
 
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