21'/22' Scarab Guys, What Prop are you running?

[ferraristyle]

Looking to get the best top end speed coupled with good acceleration. Looking to try to run around 55MPH.

The boat is an '87 21' Scarab I.

I don't know the gearing. I'm going to assume what was normal for a Merc 260 Alpha Drive combo but can't be 100%.

At WOT I'm running 5K RPM's. Top speed trimed out I have reached was 44 MPH via speedo; I don't have a GPS reading. That was with a load of 3 adults and two kids. 1/2 tank of gas. I also had a large "whale tail" fin on the back that I'm sure wasn't helping matters much,

The prop that is on it is a Quicksilver 48. It also had the numbers 16316 45 19P on it. In relatively good shape. I also believe it is stainless steel. RH motion.

Any help on what direction to go for a prop would be great. Just don't want to put down a lot of money for a prop before knowing if it will work.

[JP]

I am running a 23 mirage on a 91 excell 21' 454 @ 4600 rpms 63mph on the gps

[Fast Forward]

I had a 1985 21 years ago. Had a 350hp small block dropped in and was spinning a 21 Hyromotive if I'm not mistaken. We saw 72mph on the speedo but it was a handful!! Only did that one time.

[trc]

Any of you scarab guys have advice on a 1984 scarab 1?The boat is in Minnesota and i want to buy it and bring it to lake havasu city, Arizona.It runs fine but needs upholsrtery and paint.The price is 3500.00 plus gas to haul it to AZ.Good investment???
Please Help-WANT A COOL BOAT IN HAVASU!!

[ferraristyle]

3500 seems like a good price for the boat. Depends on what needs done to it. Paid well more than that for mine but mine is a movie/tv boat. Fun boat and still very fashionable.

May be cheaper for you to ship the boat then to go and drive and pick it up.

[hobie1]

i'm using a 23p 3 blade quicksilver on a 21' 1990. my speedo cuts out at 55 with about 1/3 throttle left. i beleive it stops at 55 because speedo is all the way to the right of transom thus out of water when i reach 55. thats with a 454