81 scarab 30' props

stype · 03-14-2005, 08:10 PM

i am trying to find out if i have the right props on my boat. they say i need to know the gear reduction for the drives. i have a 1981, 30' S-type with stock 330's trs drives 48- 23 pitch clever props. mabybe one of you have past experience that could be of help to me. my props tend to wash out coming out of the hole

muffin · 03-15-2005, 12:01 AM

Hi
What kind of RPM are you turning at WOT? You want it to be at the upper end of the recommened range. On a 330, I believe it is 4800RPM or so. Most gear ratios on stock motors are 1.5 to 1. Hope this helps.

Scarab3DMC · 03-15-2005, 05:23 PM

Yes whats your wide open throttle RPM?? ..

stype · 03-18-2005, 02:32 PM

wide open 4700, i cruise at about 3600 i have no gps yet
all i have is foctory water seedo unrelyable

scarrab30 · 04-07-2005, 06:54 AM

Your drives are 1.50 ratio. The cleaver props arent made to come out of the hole like your expecting it too. Try a set of hydromotive quad4 22 pitch and youll think your king of the lake. Ive got a 79 scarab30 and had the same problem.Ive put more motor in the boat so i run quad4x props.26pitch @ 5700rpm. 88mph. We won our class at the shootout last summer and going back this year.