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07-29-2016, 09:11 PM #46
I have a friend with a 24xl with a pretty healthy big block and that runs in the 90s but it makes a tonn of power....
1984 28 ghost twin 200 Yamah ProVs (SOLD)
1997 21 Superboat Legend 250 VMAXXX (SOLD)
2001 25 Concept CC 250EFI (SOLD)
2002 24 Superboat Step 250EFI (SOLD)
1997 21 Checkmate Pulsare 200EFI Merc (Beater Boat)(SOLD)
1994 20 Hydrasport 225 Optimax (SOLD)
1998 27 progression Twin 225 Mercs (SOLD)
2005 23 Kryptonite 300 Promax (SOLD)
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07-29-2016, 09:28 PM #47
So I'm NOT the slowest Progression. Cool! I was starting to develop a complex! I love the way it handles, and my wife loves the big cabin and big sunpad, so I'm going to leave it as it is, save my pennies, and find a 22 for going faster.
Picture of wiring included to keep thread on track, and because it's stuff like this that a lot of other builders overlook (rats' nests, unsupported wires and cables, etc).
Last edited by Spdrcr29; 07-29-2016 at 09:36 PM.
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07-29-2016, 09:56 PM #4827 Progression IO 22 Progression 300xs sold http://youtu.be/_K8boEfKrx4
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07-29-2016, 10:07 PM #4927 Progression IO 22 Progression 300xs sold http://youtu.be/_K8boEfKrx4
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topher117 liked this post
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07-30-2016, 06:24 PM #50
First of all, nice looking Progression! Now, on to your question.
I think you need to look realistically at your current motor first. The 3.4 Liter / 275 HP Mercury was an interesting beast. In its time, it put out some pretty impressive HP figures. Remember though that at that time, HP was rated at the powerhead, so all 275 ponies didn't make it to the prop. Second, some folks think 275 HP was a little bit on the optimistic side. Third, even if it was an honest 275 at the crank, the motor was quite heavy. So most boats running that motor didn't go quite as fast as the owners would have hoped. Boy did they sound cool though!
Next, consider that the folks with 24 Progressions that are running 80 MPH or more are generally running the 24LD - also known as the 237. Most of them are quite a bit lighter than your boat and a vacuum bagged 237 with a bone stock 502 I/O should run low 80's. I have a friend with a 24LD and a seriously Whipple charged 502 that's running well into the 90's. Getting back to outboards though, a 237 with a newer 300XS should run low to mid 70's at best. Also remember that a new 300 puts out a little over 300 HP at the prop - and weighs less than your current motor.
So perhaps you need to be a little bit more realistic with your expectations. Remember, you have a great looking boat and it'll go through the kind of water that would put many other boats back on the trailer without so much as breathing hard. I too have an older Progression - the very first vacuum bagged 22 in fact. It's got an old school Mercury 2.5 / 200 modified by Diamond Marine screwed to the transom and only runs 77 MPH on GPS. Sure, I could get it into the 90's with a new 300 - for twenty five or thirty grand. But I'm pretty happy running the old girl just the way she is. Feel better now?1992 Progression 22
Mercury Racing 250R
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Greg G liked this post
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07-30-2016, 08:48 PM #51
No, now I want a 25" 300XS with O/S mid, labbed 25 Tempest, and Zeiger steering even more! LOL
....Maybe if something happens to this 275... And the spare motor...Maybe then I'll pony up the coin and hit 70.
Until then I'm just gonna run it the way it is, and hope I can find some small waves to loosen up the hull on Lake Erie, Lake Michigan, and Lake St Clair... Doubtful though, prolly have to go to LOTO to find any! LolLast edited by Spdrcr29; 07-30-2016 at 08:52 PM.
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07-30-2016, 10:03 PM #521984 28 ghost twin 200 Yamah ProVs (SOLD)
1997 21 Superboat Legend 250 VMAXXX (SOLD)
2001 25 Concept CC 250EFI (SOLD)
2002 24 Superboat Step 250EFI (SOLD)
1997 21 Checkmate Pulsare 200EFI Merc (Beater Boat)(SOLD)
1994 20 Hydrasport 225 Optimax (SOLD)
1998 27 progression Twin 225 Mercs (SOLD)
2005 23 Kryptonite 300 Promax (SOLD)
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07-31-2016, 09:53 AM #535000 RPM
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Spdrcr29 liked this post
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08-01-2016, 09:46 AM #545000 RPM
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I remember my 3.4lt. Cosworth 275 merc, I blew a nice hole in the 6th cylinder. My repowered 237 LD runs 74 mph with 2003 250XS Merc Racing at @ 5700 rpm with a 23"Rev4 .
Progression 24LD Optimax 250XS
USA Hockey
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Tom Foley liked this post
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08-02-2016, 09:11 AM #555000 RPM
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Spdrcr29 liked this post
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09-24-2016, 09:21 PM #56Junior Member
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beautiful
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09-27-2016, 08:37 PM #575000 RPM
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Thanks!!
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10-01-2016, 03:31 PM #585000 RPM
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Frank Molé liked this post
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10-02-2016, 09:45 AM #595000 RPM
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Great looking pkg. How fast and what size props?