Hub kits
 

I just bought a pair of 25" M+ 3 blades to try on my 342. I currently run 23" M+. I'm bumping the rev limiters on my 502s, thus the interest in trying the 25s. I'm assuming the hub kits on my 23s are interchangeble. Anyway I went through some boxes in the garage and I have a couple new Merc FloTorq II kits. My concern is this...

MERCURY FLO-TORQ II HUB ASSEMBLY KIT

MERCURY / MARINER - 2-CYCLE 60HP BIG FOOT, 4-STOKE 40-60HP BIG FOOT, 70THROUGH 250 HP

FORCE - 90 THROUGH 120 HP

MERCRUISER - ALPHA AND ALPHA ONE, BRAVO ONE (LESS THAN 400HP)

Will the ones I have work as spares? If not, what do I need?

They will work. Having a extra set of inserts is a good idea though.