jetdrive interchangability

bigdaddysboats

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Joined
Aug 3, 2011
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Long time lurker now having trouble.
I have a 16 foot mitch craft jet flyer with a 120 mercury 4 cylinder serial number oeo265796
and itis froze up.
Given to me is a "rebuilt" 90 force 3 cylinder serial number oeo25066 aside from being 30hp and a cylinder short will it bolt up to the jet drive and are the crank shaft inputs the same size?
Will the motor be enogh to push the boat up on plane and perform well enough for my kids to play with on the river or keep looking for a 120hp.
Any response is a good one.
Thanks a bunch
 
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