Tunnel Hull prop size?

[C-Mac]

Hi all,

A friend of mine bought a 30" tunnel hull with a Thundertiger .21 nitor motor unfortunatley the instructions are in chinese and there are no prop recommendations.

What size prop would be ideal for this boat or at least a starting point?

Thanks for the help,
C-Mac

[C-Mac]

would either of these work?

AQUB9720 GrimRacer 40 x 52 3-Blade Metal Prop
AQUB9715 GrimRacer 40 x 53 2-Blade Metal Prop

[Chuck E Cheese]

those above are good. i have run k&b, rossi, OS outboards but not a TT. i always ended up on 215 or mod 438 or 1440
check out international waters for info on nitro, there will be alot on outboards and TT's

[C-Mac]

Thanks for all the info Chuck! Nice fleet btw