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400cc Modified Hydroplane

400cc Modified Hydro (400ccMH), Also known as "25 Mod" & 25MH

Requirements

Minimum Age:

16 years old

Engine:

Mercury 25 SS or Mercury 22.0 Powerhead 1970 to date. OMC Powerhead 1970 to date

Speed:

65 - 70 MPH

Minimum Weight:

350 lbs.

Engine Block:

22.0 cubic inches and 22.1 cubic inches