super speedmaster props

**Richard** · 04-06-2022, 01:57 PM

I'm looking for props for my 1968 super speedster. 12 spline ,19 pitch round ear

**Dave S** · 04-06-2022, 05:03 PM

Need more info.......Lh or RH......What motor/ rig? 19 is a big one to use........

**Richard** · 04-06-2022, 05:09 PM

rh rotation. 1250 Bridgeport. switzer shooting star

**crazy horse** · 04-07-2022, 09:27 AM

Richard, The round ear ssm wheels came in 9 in. and 9.5 inches in dia. Like Dave said a 19 in. pitch is pretty tall. That's is highest pitch Merc made in a round ear three blade. Here the part # for the 9X19 righty A-48-61920 and the # for the 9.5X19 is A-48-61922. I don't see to many round ear wheels anymore. What gear ratio is your SSM?

**Richard** · 04-08-2022, 10:24 AM

1:1. found a two blade round ear 18 pitch. It's 9.5 in. diameter. Not much choice out there so I gotta try what I can get. hope it works for now.thanks for the reply.

**Dave S** · 04-08-2022, 06:58 PM

Worth try'in......I learnt to try any prop.......

I have a 3 blade round ear.....factory 17..... marked 16..... then with a slight cup.......If you want me to send it to ya....to try....Why not a cleaver?

**25ss** · 04-14-2022, 02:04 AM

I have 3 RH rounds (1) 8 3/4 -17 (1) 9-15 (1) 9-17
I also have 4 two blade RH
Like Dave said with a 1-1 gearcase and a 1250 i would go as low as poss.
No way going to turn a 19 thats TII X power
You could turn a 19 with a 13-16 gearcase
I have a 14-15 and with my 1250 SBP stacker only run a 10-17 cleaver.
Dale