a good prop for a pig scarab 28'
 

I'm having a hard time finding a prop that gives me speed and rpm the slug is a 1988 28' scarab excel before messing with the bravo drive,rpm's were 5400 with a 23p mirage I put on an Imco 2" shortie but now cavitate badly with the mirage. I tried a 4 blade Powertech 25p rpm is high 3's and a 23p powertech 4 blade at 4200 rpm speed is unknown but it doesn't seem anything near 70 my gps crapped out. Boat has somewhere around 500-550 hp. Any suggestions would be gladly appreciated

I have a like new Bravo 1 4 blade 22p RH if interested. I ran it 4 times and the boats simply prefers the Mirage. A buddy of mine is trying it but if he's not interested $350

Which Powertech props did you try? The OFS4, SFS4 or one of thier other ones.

Your Mirage has been rendered almost useless with the 2" shorter lower unit, especially if it was an old Mirage and not a Mirage Plus. You will need a 4 blade prop to get acceptable performance from your boat.

A good starting point would be a 24 Bravo 1 if your old prop was a Mirage Plus and a 22 Bravo 1 if your old prop was a Mirage. If you tried a Powertech OFS4 25p it would be equal to about a 27 pitch Bravo 1. Thats why you were not able to turn it.

We have test props that can be checked out. That way you can try a prop and make sure it does what you want it to prior to making a purchase.

Throttle Up Propellers
877-842-6855

As a ref. point, I'm running a 26 Bravo one with a procharger.
It's running 71mph at 5500 RPM. (Bravo outdrive)

throttle up,the # is m2500fs4r25p is that the one you mentioned

SCARAB 28, how many ponies would you say are under the hatch

PQ sorry about the quote, I'm new at this I'm actually going to try a Bravo1 22p this weekend are there any dings at all or blemishes on the one that you have for $350

why'd you change to a shortie?

you are all looking at the Wong prop for that boat. I ran over a dozen props on that hull . Bravo 1 and hydro-motive all create to much stern lift. With the boat as long as it is for a single engine boat It cant hold the bow up with those props. This hull is a pad bottom. The pad will do the work to lift the stern . if you use a prop that creates stern lift all you are doing is keeping the bow low. The boat will ride with to much hull in the water and creating a much higher slip factor. If the boat sticks like glue to the water and don't like to fly off of a wake then thats your problem. You need a 4 blade prop that will give you bow lift. this will allow the pad in the hull to do its job an lift the stern. The boat will run much lighter and a bit looser but much more efficient on speed. You wont feel like you might stuff the hull if you hit Wong.

I use to have a 485hp motor and was running a 23 mirage 3 blade. it was reving at 5400 I also got the exact same results as you with the 23 power tech. so I would say that you have about the same HP I did . If you are going to run a power tech you need to run a 21 power tech to get 5000 rpm's but don't look for 70 mph.



28 Scarab sorry to say, you should be running much faster. Change that prop.

I hear you - Any suggestions on correct prop - Running about 550 -600 HP.

I am Heading to the boat now. The prop that I am running is a Older Merc prop that they don't make any more. I cant remember the model off the top of my head . I believe it was made for use on O/B's. I have two of them that I am borrowing . 25 P and a 26 P I am currently running the 25 at 5300 but I have a few things I still Have to do to the motor. I am not getting any water to the inter cooler at WOT. I am only running 4 PSI of boost and I want 6. I have the timing set at 28 and it was designed to run at 30 and the 26 prop has to be labed. When this is all done I hope to see high 70's .I will keep you posted on my results when I GPS her when I am finished. I just wont GPS her till I am all finished. But I know the boat is running close to or at 75 now. When I get in tonight or in the morning I will tell you what prop I have. The correct prop on this hull is everything.

Paul

Paul -

Are those three or four blades you're running?

eyezlee, I thoght a shortie would give me a few bolt on mph

HEY HOT BOAT ,YOU HAVE NEVER SEEN MY BOAT HOW DO YOU KNOW HOW FAST I AM RUNNING? OR WHAT PROP. I AM RUNNING?SEE YOUR POST #10 ????????????????????? P.S. I USED TO RUN ABOUT 75 MPH WITH A STOCK 500HP A FEW YEARS AGO.

Re: a good prop for a pig scarab 28'
 

I recently worked a 24 Bravo -one for a guy here in Houston, It worked so well, he picked up a solid 4 mph! He called me to tell me the good news. I asked him to let me know, the results either way. SO HE DID and brought the prop back in, so I could copy just what I did do. I have the perfect blade design and amount of cupping and thickness for this setup. IT'S USUALLY YOU ONLY HERE THE BAD, BUT NICE TO HEAR THE GOOD, SO WE CAN DO THINGS LIKE THIS TO BENEFIT US ALL./Darin

28 Scarab I thought that would get your attention......... Was it you I talked with on the phone last year and told me what motor configuration they had but wouldn't tell me what prop they were running at the time like it was a big secret. :rolleyes:

If it wasn't Please accept my apologies.

Personally I get a feeling of self gratitude by being able to share my experience's so that someone might benefit from them.

If you would like to share what HP , Prop, Speed and RPM your running now and past configurations maybe we can all learn something here.

I have talked with a few people with this boat that had big power and had problems with finding the correct prop or trying to get over the 70 MPH mark.

28 Scarab - I think Hot Boat was referring to my prop and speed.

SCARAB 28 YOU MAY BE RIGHT. Paul no big secret as you say. I run a Hydromotive 27p reworked by Bronson Hill hp.is 720 Boost7.5 5500-5600 rpm if you recall I called you and told you I had some props, at the time you could test last summer if you wanted to. Why we run the hydro. is the river is not like a lake as you know and we feel the boat handles better and is safe then the other props that we tested. AS far as me helping others I will and have gone out of my way to help in the past.!!

Houston Prop can you leave me prices and details on my e-mail [email protected]

HoustonProp - I also would like to speak with you. You can contact me on my email also. ([email protected])

Thanks
Al