From the John Tiger Hotboat article
Allison SS2000
1994 Mariner 2.5 260
ECU modified, JC modified gearcase, otherwise stock
Performance Propellers 32" chopper cut
119.5 @ 7750
sluggish acceleration
top speed pretty controllable
Mazco chopper cut, 31"
117 @ 8000
good handling
very good mid range
Hoss Triton 28"
115 @ 8500
best acceleration of props tested
top speed handling could not be better
Mazco RE4 26"
109 @ 8800
handling and lift were phenomenal
Mazco RE3 30"
118.5 @ 8200
excellent handling
Mazco offshore cleaver pitch not listed
117.5 @ 7900
acceleration not nearly as good as round ears
"hair raising" handling