1987-242SS454

Can anyone recommend the proper propellor for a 242 with a 454 and no bottom paint, 1.47 Alpha drive. I have a 20 pitch quicksilver QA6186 20 4 blade alum. on it now. It gets out of the hole nice, but I can only get 43mph gps @4500RPM.
I am told the boat should do 50mph. Can anyone recomend a 3 blade stainless prop for this boat, and what specs it should be?
Thank you,
Brian

mopower

I know someone with an 89 242LS /454 Mag and 1.50 Bravo . They turn a 21" Mirage 53 mph

1987-242SS454

Do you know what RPM it turns at 53mph?

mopower

Don't know off hand but would venture to say near 5000. Another friend had a 242/502Mag/23" Mirage and got 60 at 5000.

jrocket

Have 91' model (search jrockets 242) with a 23p Hydromotive quad IV turns 5500 @ 62 A little twistedup 502.
The boat isn't built to fly but it sure is a comfortable ride.

I also have a labbed 23 mirage 3 blade it will spin 5800.

1987-242SS454

Does anyone know what RPM a stock 454 should turn? I thought it was between 4400 and 4600 @ WOT. The motor is a new(rebuilt) unit that has about 20 hours on it. I also know that the ALpha drive is a weak point for the 1987 with a 454. That was a brand new unit 3 years ago. I was going to try a friend of mines 19 pitch mirage first and see what happens. I don't want to explode the motor with too much RPMs.

masi242

I run the same setup you have but I have a 242ls with a bravo 1 22 pitch, labbed a little 54.5 gps. I believe this is as good as it gets for a stock set up 4600 rpm.

1987-242SS454

I would be happy with that compared to the 43GPS I get now. I am a newby to the performance props...What is labbed a little mean?