Newbie
07-13-2023 | 07:12 AM
#11
Registered
Joined: Dec 2002
Posts: 391
Likes: 9
From: Denmark
From an earlier thread someone posted that this is the official factory data with a 502:
1996 Scarab 26
26' 9" LOA
8' Beam
4900 lbs
23º deadrise
Draft: Up 21"
Draft: Down 37"
Factory Specs (502):
195 Mile Range on 502
Time to plane: 6.5 secs
Top Speed: 63 MPH @ 4800 RPM
Cruising Speed: 41 MPH @ 3600 RPM
Tested with Mirage 14 5/8" X 23º Prop
So I would guess the 454 is a few miles slower, probably 58-60 MPH with a prop that works well.
1996 Scarab 26
26' 9" LOA
8' Beam
4900 lbs
23º deadrise
Draft: Up 21"
Draft: Down 37"
Factory Specs (502):
195 Mile Range on 502
Time to plane: 6.5 secs
Top Speed: 63 MPH @ 4800 RPM
Cruising Speed: 41 MPH @ 3600 RPM
Tested with Mirage 14 5/8" X 23º Prop
So I would guess the 454 is a few miles slower, probably 58-60 MPH with a prop that works well.
07-13-2023 | 07:26 AM
#12
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Joined: Oct 2000
Posts: 3,775
Likes: 638
From: Lakewood, NY, USA
Something seems wrong, to me. I had a 1998 Velocity, same size, same engine. On a good day and light load it would just hit 72 mph, on GPS. It would rum 69/70 any day of the week. I would expect a Velocity to be faster but not by 20mph! I was running a 25or 26 hydromotive, I can't remember which but I think 25. I would check the engine before investing in a new prop.
Padraig
Padraig
Padraig
07-13-2023 | 08:26 AM
#13
Registered
Joined: Jun 2005
Posts: 8,407
Likes: 797
From: Central IL
Firstly, thanks for all the responses.
The engine sounds good. There are no misses, knocks or stalls switching between fwd and reverse. But I will most certainly do a compression check.
Trim. When running the boat WOT and adjusting the trim, I hit a point where if I adjust it up or down the boat slows down. So I believe I’m in the sweet spot there? And yes, trim tabs are all up.
As for props.
Where do I begin? Is there a method to choosing what the next prop is?
Again, I appreciate all the feedback and info.
The engine sounds good. There are no misses, knocks or stalls switching between fwd and reverse. But I will most certainly do a compression check.
Trim. When running the boat WOT and adjusting the trim, I hit a point where if I adjust it up or down the boat slows down. So I believe I’m in the sweet spot there? And yes, trim tabs are all up.
As for props.
Where do I begin? Is there a method to choosing what the next prop is?
Again, I appreciate all the feedback and info.
07-14-2023 | 07:30 AM
#16
Registered
Joined: Jun 2005
Posts: 8,407
Likes: 797
From: Central IL
Take a long straightedge and set it up lengthwise against the hull in various places at the back. If you see a significant gap between the hull and straightedge anywhere you have a hook. Can be caused by the hull overhanging the trailer bunks too far among other things. Does your boat carry the bow well at speed or does it seem to want to bow hunt?
