Offshoreonly com - Jan 8, 2017 · We also replace the tailpipe gaskets, oil and filter, etc. Eddie. Reply. Reply Share. 1 / 5. General Q & A - 525 Repair Costs?? - For a 2007 525 package, with slightly over 200 hours, what's the cost to change the springs, retainers, locks and seals? In an earlier post, Eddie suggested these things if motors are close to 200 hours.

 
Oct 6, 2009 · Offshoreonly Industry News; General Boating Discussion; Classic Offshore; Insurance and Finance; Poker Runs and Boating Events; Boating Safety; Beware and Stolen; Vendor Talk; Trucks, Trailers and Transportation; Technical. General Q & A; Do It Yourself, Boating on a Budget; Drives and Lower Units; Electronics; Fiberglass and Paint; Prop Talk ... . Mylowesbenefits hub

Mar 4, 2011 · 502 MPI upgrade results. I just got this off the dyno a couple days ago and think this is a great little package for the 502. The cam is from Bob Madara, the tune is from Mark Boos. Stock 502mpi with the intake dividers cut down and a bit of porting, stainless marine exhaust, run on the dyno with all accessories, wet exhaust through GGB mufflers.The problems with major cracking has been in the liner built boats. The stringer built boats such as the 25 have been fine. The problems you have heard on the 2006 and prior boats have been in the 23, 30 and a few 20/202s. There were several 35's and a couple of 26's as well that had the problems. We have a 25 Outlaw and love it.Performance Boat Center is a marine dealership with locations in Missouri and Florida. We sell new and pre-owned Boats with excellent financing and pricing options.Find the latest MISTE INVERSIONES, SICAV S.A. (0P0000ITMX.F) stock quote, history, news and other vital information to help you with your stock trading and investing.Delta Air Lines and Australian carrier Rex are forming an interline partnership that will provide benefits to customers of both carriers. We may be compensated when you click on pr...Oct 11, 2007 · Received 1,080 Likes on 479 Posts. Slippery slope here. A true 24' V-bottom would be like the old 24' Baja and the even older 24' Cannon/Thunder powerboats. There are literally DOZENS of 24/7 boats (actually the original hull was 23+change' long and 7' wide). The Superboat mentioned above falls in that category. General Boating Discussion - Pics from 2021, 2022, 2023, 2024 - T-minus 14 Days to Key West Kick-off ParadeJoin Date: Nov 2006. Location: Tygart Lake, WV. Posts: 1,284. Likes: 258. Received 116 Likes on 79 Posts. The 520, 540, 565 all use the same cam as was used in the 525efi. I like the recommendation every 100hrs or …When we can no longer change a situation, we are challenged to change ourselves. ~ Viktor Frankl In life, some When we can no longer change a situation, we are challenged to change...Received 106 Likes on 81 Posts. Blower Paint options. Looking to paint my B&M 420s and BBC polished intakes. I've heard that paints get a bad rap for insulating and not shedding the blower case heat. What success have you had with great looking thermal shedding paint on blowers? Salt water use.May 1, 2018 · 500 efi rebuild. Ok I feel kinda of dumb, I have 2 blue 500 efi engines that I want to rebuild and keep it stock. I have read and understand that this engine is mostly the same as the GM crate engine 502. I want to go through this engine and refresh everything. One of my engine broke a valve spring so I figure I will just got through the entire ... Jul 1, 2017 · As for my personal favorite, I have Imron on the CLE gear case on my 1992 Mercury 2.5/200 outboard. I had the gear case professionally painted by a friend over 20 years ago. Other than a few light scratches and chips picked up from running almost 80 MPH over the years, it still looks damn near perfect. The Insider Trading Activity of FEBBO WILLIAM J on Markets Insider. Indices Commodities Currencies StocksReceived 778 Likes on 359 Posts. mefi tuning question for experts. I was out this morning doing some fine tuning on my boat with my new mefiburn software and I am starting to get a basic understanding of how it works. This was the second time out with it,last week I went out and ran it from idle to partial boost and slightly tweaked the fuel ... Offshoreonly Industry News; General Boating Discussion; Classic Offshore; Insurance and Finance; Poker Runs and Boating Events; Boating Safety; Beware and Stolen; Vendor Talk; Trucks, Trailers and Transportation; Technical. General Q & A; Do It Yourself, Boating on a Budget; Drives and Lower Units; Electronics; Fiberglass and Paint; Prop Talk ... Avatars are launching for enterprise users of Microsoft Teams. In related news, Mesh, Microsoft's take on the 'metaverse,' is launching in preview. Is the tedium of videoconferenci...Firing @ #1, You can now adjust the following valves: INTAKE on cylinders 1,2,5,7. EXHAUST on cylinders 1,3,4,8. Loosen the adjusting nut until lash is felt by rotating the pushrod. Then. tighten the adjusting nut while rotating the pushrod until all lash is. removed. Now tighten the adjusting nut 1/2 full turn.Discover joins a growing list of issuers that are making redemptions more flexible for cardholders. Update: Some offers mentioned below are no longer available. View the current of... Offshoreonly Industry News; General Boating Discussion; Classic Offshore; Insurance and Finance; Poker Runs and Boating Events; Boating Safety; Beware and Stolen; Vendor Talk; Trucks, Trailers and Transportation; Technical. General Q & A; Do It Yourself, Boating on a Budget; Drives and Lower Units; Electronics; Fiberglass and Paint; Prop Talk ... Offshoreonly Industry News; General Boating Discussion; Classic Offshore; Insurance and Finance; Poker Runs and Boating Events; Boating Safety; Beware and Stolen; Vendor Talk; Trucks, Trailers and Transportation; Technical. General Q & A; Do It Yourself, Boating on a Budget; Drives and Lower Units; Electronics; Fiberglass and …General Q & A - Looking for full Specs on stock 425hp 496HO cam - I am looking for the full specifications on the stock Merc 425hp 496HO cam to include at 0.006" valve opening.Offshoreonly Industry News; General Boating Discussion; Classic Offshore; Insurance and Finance; Poker Runs and Boating Events; Boating Safety; Beware and Stolen; Vendor Talk; Trucks, Trailers and Transportation; Technical. General Q & A; Do It Yourself, Boating on a Budget; Drives and Lower Units; Electronics; Fiberglass and …In fact nobody in manufacturing is immune to this possibility, ISO facility or not. I like both, however Mercs pricing is absurd! I love seeing competition from Sierra, SEI etc. When merc charges $85 for a serpentine belt and you can get a dimensionally identical gates belt for $25, that's just stupid.Reply Share. 1 / 1. Swap Shop - CMI E Top Satin Exhaust System - CMI 520 E Top Satin Exhaust system. Used 1 season, fresh water only. 4" hose. Local pick up preferred, but can ship at buyers expense. Asking $3000.00. Part Number 650-13178. DM with any questions.Mar 18, 2023 · Location: OK and LoTO. Posts: 4,037. Likes: 21. Received 387 Likes on 123 Posts. IR designs has always done mine. Get started now because it’s not a quick process. Reply. 03-18-2023, 10:27 PM.02/02/2024. 7. PSI Supercharger Kit 1150/1500HP Turn Key kit with EFI system Ignition and Chiller. 01/31/2024. 8. Duttweiler Custom Engines - 2,385 HP Each on Race Fuel. 01/22/2024. 9. NEW MERCURY 500 HP ENGINE.Learn about QR code uses in your business, with easy examples. See how to use QR codes for marketing, texting, contactless transactions, much more. If you buy something through our...Hey Scott, the setup is good. The Evinrude had a little too much setback (6" more than the Merc). So it runs a little flatter now, where it used to feel real light in the bow.The base price for the smallest to the larges ranged from $20,000 to $60,000. Eventually, the company moved out of Zeeland to a smaller factory space in Holland Township at 13327 Quincy Street, and stopped production in 1989. All equipment and assets sold to StarCraft., according to Jim Bouwens.May 1, 2018 · 500 efi rebuild. Ok I feel kinda of dumb, I have 2 blue 500 efi engines that I want to rebuild and keep it stock. I have read and understand that this engine is mostly the same as the GM crate engine 502. I want to go through this engine and refresh everything. One of my engine broke a valve spring so I figure I will just got through the entire ...Oct 6, 2009 · Offshoreonly Industry News; General Boating Discussion; Classic Offshore; Insurance and Finance; Poker Runs and Boating Events; Boating Safety; Beware and Stolen; Vendor Talk; Trucks, Trailers and Transportation; Technical. General Q & A; Do It Yourself, Boating on a Budget; Drives and Lower Units; Electronics; Fiberglass and Paint; Prop Talk ... Performance Boat Center is a marine dealership with locations in Missouri and Florida. We sell new and pre-owned Boats with excellent financing and pricing options.Received 10 Likes on 5 Posts. ACE Trailers, Florida. My new trailer was just delivered from Ace Trailers in Gibsonton. It came in 5 days ahead of schedule (I was quoted 3 weeks), is of the best quality and fit my boat perfectly with no necessary adjustments. Terry took the time to contact Sutphen directly for the proper …Received 68 Likes on 34 Posts. High Water Pressure Merc 700 SCI. Helping a buddy troubleshoot his high water pressure issue, the boat has low water pickups and staggered Mercury 700 SCI’s. It has Hardin two stage sea water pumps, boat pumped water on the hose with no issue. Backed it in at the ramp and it wouldn’t pump any water. · Formula - Discussions about boats built by this manufacturer.May 25, 2005 · Received 0 Likes on 0 Posts. CMI Headers. As we all know, there are 2 sides to every story. Here is my side. I ordered a set of CMI headers and tails from Trick Marine on Monday 5/9. Fred had the headers in stock and shipped the same day. I had them on 5/11. Unfortunetly, Fred can not stock the infinite amount of tails necessary to keep all of ... General Q & A - Camshaft for 350 - I am in the process of replacing the 350/260 engine in my scorpion 230. The engine I am replacing it with was built by a local machine shop, I was told it would have a conservative 350+ hp.(@ 5000RPM) I was just wondering on your take on it. The engine has 9:1 compression 4 boltLearn about QR code uses in your business, with easy examples. See how to use QR codes for marketing, texting, contactless transactions, much more. If you buy something through our...Jan 25, 2024 · 1 / 2. General Q & A - Intake help - I have a 10.15 compression 509 was efi 502 . Has alluminum heads with 320 cc intake runners 2.30 intake and a bullet cam 234 intake duration @50 with .590 lift and 242 duration and .598 exh at 113 lobe seperation hydraulic roller . The boat is a 22 dcb with xr drive with shorty lower.DCB - Discussions about boats built by this manufacturer.Hey Scott, the setup is good. The Evinrude had a little too much setback (6" more than the Merc). So it runs a little flatter now, where it used to feel real light in the bow.The CDC said Thursday the masks can come off, so we’re about to see a lot of cute faces out there after months of isolation. Faces that you didn’t think were cute before lockdown a...Lift .483”/. 483”. ICL 109*. LSA 115.5*. I also purchased two brand new engines from 1800runsnew. Took them apart to put in RMBUILDER cams, and did some headwork. Best of everything, no problems whats so ever. This is the right spec numbers for the new GM base 502 new engine only. Last edited by Rockfish71; 02-14-2012 at 08:45 AM.Buying the best roof sealant for your home can provide a quick fix, extend your roof's lifespan, and save you money. Read our sealant guide to learn more. Expert Advice On Improvin...Jul 6, 2017 · Hope everyone is having a good boating season! It's been awhile since I've been on any forum so if there is a tread on this I apologize. I have an eliminator 25 Daytona newer bottom with 1000 hp 565 BBC blower motor with a full IMCO SCX,blueprinted -2 1400 lower, it is one of the first 1400 lowers blueprinted from IMCO . General Q & A - Looking for full Specs on stock 425hp 496HO cam - I am looking for the full specifications on the stock Merc 425hp 496HO cam to include at 0.006" valve opening.General Q & A - Mercruiser 7.4 MPI motor problem - I have a 2001 Baja Islander with a Merc 7.4 MPI engine and need some help figuring out what could be causing the problems i'm having. I've had the boat in the shop 3 times and about $900 later and still no resolution yet. Typically, we will be on the water running.Received 2 Likes on 2 Posts. Transom Replacement Coosa or Wood. Having my transom replaced in my Baja 36 Outlaw. Coosa was suggested by my builder but I cannot find much on using it in a heavy performance boat. I'm concerned with strength vs plywood. Treated plywood is pretty much rot proof as well.Reply Share. 1 / 1. Swap Shop - CMI E Top Satin Exhaust System - CMI 520 E Top Satin Exhaust system. Used 1 season, fresh water only. 4" hose. Local pick up preferred, but can ship at buyers expense. Asking $3000.00. Part Number 650-13178. DM with any questions.Feb 29, 2024 · The Fora platform includes forum software by XenForo. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. A forum community …2 days ago · Offshore provides timely, actionable and relevant news and technical content for the offshore oil, gas and renewable energy industries throughout the world.May 25, 2008 · General Q & A - Looking for full Specs on stock 425hp 496HO cam - I am looking for the full specifications on the stock Merc 425hp 496HO cam to include at 0.006" valve opening. Offshore Yachts is a yacht builder that currently has 48 yachts for sale on YachtWorld, including 27 new vessels and 21 used yachts, listed by experienced boat and yacht brokers mainly in the following countries: …Jun 6, 2023 · Drives and Lower Units - All American Drive Service - DO NOT USE. I just got off the phone with the Bronson, MI police department. The last couple months they have been receiving calls almost daily on this business. George has not returned my call to his cell phone, business phone, emails, nor text messages. He has hadRead about how a 1970s kitchen was remodeled with new cabinets and countertops, and the wall between it and the living room removed to open up the space. Expert Advice On Improving...Offshoreonly Industry News; General Boating Discussion; Classic Offshore; Insurance and Finance; Poker Runs and Boating Events; Boating Safety; Beware and Stolen; Vendor Talk; Trucks, Trailers and Transportation; Technical. General Q & A; Do It Yourself, Boating on a Budget; Drives and Lower Units; Electronics; Fiberglass and …39. SC39. 699000. This is a full carbon fiber Outerlimits SC39 open cockpit powered by fresh Mercury Racing 1100's (Rebuilt by Mercury), coupled to Mercury Racing #6 Drives. The boat actually measures 44ft overall with.. 5. 2017 Outerlimits SV50 Carbon Fiber 1350/1550. 2017.Received 0 Likes on 0 Posts. CMI Headers. As we all know, there are 2 sides to every story. Here is my side. I ordered a set of CMI headers and tails from Trick Marine on Monday 5/9. Fred had the headers in stock and shipped the same day. I had them on 5/11. Unfortunetly, Fred can not stock the infinite amount of tails necessary to …In a hard landing scenario for the economy, Kostin expects the S&P 500 to fall to 3,150, marking a 24% slide from current levels. Jump to Goldman Sachs is growing more and more ske... Offshoreonly Industry News; General Boating Discussion; Classic Offshore; Insurance and Finance; Poker Runs and Boating Events; Boating Safety; Beware and Stolen; Vendor Talk; Trucks, Trailers and Transportation; Technical. General Q & A; Do It Yourself, Boating on a Budget; Drives and Lower Units; Electronics; Fiberglass and Paint; Prop Talk ... You can get the clutch plates online. That clutch drum and some of the associated parts are from a Ford FMX trans. Those are the clutch plates you'll need. There is no specific forward gear. The clutches lock up to give you forward. Those gears create reverse through the planetary when the band locks the drum down. Offshoreonly Industry News; General Boating Discussion; Classic Offshore; Insurance and Finance; Poker Runs and Boating Events; Boating Safety; Beware and Stolen; Vendor Talk; Trucks, Trailers and Transportation; Technical. General Q & A; Do It Yourself, Boating on a Budget; Drives and Lower Units; Electronics; Fiberglass and Paint; Prop Talk ...  · He's telling you that you're just throwing random solutions to an issue without even diagnosing first so to speak. (If there is an issue) Someone told you, you had a "worn out" Bravo 1 prop so you buy a Bravo 1 FS.Re: 28 SS with Arnesons. The price seems a touch too high for me. I like the twin turbo engines, though. If I bought the boat, the engines would come out. I would install fuel injection because its easy to find for a small block. While the engines are out, I'd re-rig it. I found an 86 28ss in December for $10K and my best friend bought it.Jul 17, 2007 · TexomaPowerboater. They don't make parts for the OMC anymore. General Boating Discussion - 7.5L 460 King Cobra. anyone familiar with this power package - I am looking at buying a 1989 boat with this power package but I don't know anything about it. Here is the link to the boat, it will be used to knock around in in S FL.02/02/2024. 7. PSI Supercharger Kit 1150/1500HP Turn Key kit with EFI system Ignition and Chiller. 01/31/2024. 8. Duttweiler Custom Engines - 2,385 HP Each on Race Fuel. 01/22/2024. 9. NEW MERCURY 500 HP ENGINE.Jun 9, 2015 · Their gear oil seems to do well and does well in Volvo's for a GL 5 spec. For stock black production engines their gear oil does well. Their impellers some are the exact made as Merc but some are not. Sierra has so many impellers for a lot of models and makes. They buy from Johnson as well. Offshoreonly.com is the leading website of high performance boating enthusiasts. Our Bulletin Board, Chat Room, Classifieds section, Photo and Movies Sections, and On-line store account for our success in becoming the largest boating website on the internet. General Q & A - Nordic Rage 496HO - I have a 2004 Nordic Rage open bow with the 496HO and 1.5:1 and a 26 pitch Bravo1. Total hours now is 70. A 2002 published boat test on Lake Havasu (~ sea level) with this identical package posted a 75.6 mph @5000 rpm (radar) -77.2 mph (GPS) top end with a lab finished 26 pitchOffshoreonly.com is the leading website of high performance boating enthusiasts. Our Bulletin Board, Chat Room, Classifieds section, Photo and Movies Sections, and On-line store account for our success in becoming the largest boating website on the internet. Find the information that you are looking for, or just make friends with other boaters who share …Powerboat Listings: powerboats for sale by owner. Show powerboats under: 25 30 35 40 45 50 60 70 feet. Show powerboats over: 20 30 40 feet Show All. Search for a Boat.Google, which hosts billions of user accounts, said on Tuesday that it plans to delete accounts that have remained inactive for two years. Google, which hosts billions of user acco...Mercury Marine (TBS) Supercharger Kit. $4700.00. Though these kits are made for a standard 700SCI, this TBS supercharger kit setup, will fit any big block Chevy that has rectangle head ports and a Mefi ECU. Tall decks would need spacers, and if need.. 2. (4) Yamaha F-350 Outboards w/ rigging. 2013. 2013.Location: BC. Posts: 386. Likes: 35. Received 106 Likes on 81 Posts. Blower Paint options. Looking to paint my B&M 420s and BBC polished intakes. I've heard that paints get a bad rap for insulating and not shedding the blower case heat.Offshoreonly girl of the month. Tags girl month offshoreonly. Jump to Latest Follow 46K views 75 replies 37 participants last post by EVILFORCE Apr 13, 2014. T. The510 Discussion starter 237 posts · Joined 2012 Add to quote; Only show this user #1 · Sep 22, 2012 "Jennifer is the First OSO Boater Girl of the Month" really?? she is the girl …2 days ago · It’s Time You Get Your MTI — CALL 636.639.1166. Marine Technology Inc. (MTI) is the industry leader in manufacturing of High Performance Racing and Pleasure Catamaran style boats, Center …Jan 10, 2024 · Location: BC. Posts: 386. Likes: 35. Received 106 Likes on 81 Posts. Blower Paint options. Looking to paint my B&M 420s and BBC polished intakes. I've heard that paints get a bad rap for insulating and not shedding the blower case heat. Young Performance. Are you referring to the 454 Mag MPI (385 hp) vs the 7.4 Mpi (310hp)? If so, the mag motor is a 4 bolt block with all forged bottom end and rectangle port heads. The 7.4 MPI has a 2 bolt block, cast crank, 3/8 rods, cast pistons, peanut oval port heads with smaller valves,etc. Not a good platform to modify.Their gear oil seems to do well and does well in Volvo's for a GL 5 spec. For stock black production engines their gear oil does well. Their impellers some are the exact made as Merc but some are not. Sierra has so many impellers for a lot of models and makes. They buy from Johnson as well.1. Drives and Lower Units - gear oil for bravo - looking to go to royal purple gear oil for a bravo one outdrive.should i use the 75w-140 or the 75w-90 synthetic thanks mike.

Aug 31, 2020 · Location: St. Clair Shores, MI. Posts: 2,038. Likes: 33. Received 97 Likes on 51 Posts. I looked into using the sniper system for a blow thru twin turbo system on one of my Scarabs, and read good reviews about it. There is a Faceboog group supported by holley for the Sniper. Most of the people *****ing about it usually results from bad wiring .... Girlylana leak

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Oct 6, 2009 · Offshoreonly Industry News; General Boating Discussion; Classic Offshore; Insurance and Finance; Poker Runs and Boating Events; Boating Safety; Beware and Stolen; Vendor Talk; Trucks, Trailers and Transportation; Technical. General Q & A; Do It Yourself, Boating on a Budget; Drives and Lower Units; Electronics; Fiberglass and Paint; Prop Talk ... Coolest Cooler, one of the most popular crowd-funding campaigns ever, is out of cash and can't ship coolers to early backers. By clicking "TRY IT", I agree to receive newsletters a...Mar 10, 2015 · Swap Shop - Mercury Racing 525 EFI With Less Than 10 Hours For Sale - This is a 525 EFI that has a total of 146 hours on it that was rebuilt at Doller Offshore Marine when it had 137 hours on it. The rebuild included SRP pistons, rings, bearings, all new valves and springs totaling $9,170.76. We upgraded the power inFlat Tappet. Rick, Typically a 454 of the specs you are showing would use like a 750 cfm carb with a duel plane intake.No single plane on that motor.The carb you have you will need to find numbers on it or measure the barrels to determine exactly what it is.Also be sure you have a good high volume fuel pump.While points and miles are not a substitute for a real emergency preparedness plan, it’s a supplement that can take the stress out of finding shelter and a viable evacuation route....May 25, 2008 · General Q & A - Looking for full Specs on stock 425hp 496HO cam - I am looking for the full specifications on the stock Merc 425hp 496HO cam to include at 0.006" valve opening. Multi Media Gallery. Eaton Photos. Freeze Frame Video. Lucididee Fast Boats. Naples Image. Performance Images. RogerThat Images. Sharkey-Images. Shoot 2 Thrill Pix.Their gear oil seems to do well and does well in Volvo's for a GL 5 spec. For stock black production engines their gear oil does well. Their impellers some are the exact made as Merc but some are not. Sierra has so many impellers for a lot of models and makes. They buy from Johnson as well.Apr 23, 2018 · I am from the Detroit area. I wanted to have my two 1250's tuned. I called around and found Ben at Chief engines also known as Precision Power Offshore in spring lake Michigan. I told him I had a pair of 1250's with the Holley EFI system and looking for a shop that could tune them. He told me he was a Holley expert. Ben convinced me to go …The problems with major cracking has been in the liner built boats. The stringer built boats such as the 25 have been fine. The problems you have heard on the 2006 and prior boats have been in the 23, 30 and a few 20/202s. There were several 35's and a couple of 26's as well that had the problems. We have a 25 Outlaw and love it.The Fora platform includes forum software by XenForo. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. A forum community dedicated to performance boat owners and enthusiasts. Come join the discussion about offshore racing, performance, modifications, builds...Mar 19, 2003 · Offshoreonly Industry News; General Boating Discussion; Classic Offshore; Insurance and Finance; Poker Runs and Boating Events; Boating Safety; Beware and Stolen; Vendor Talk; Trucks, Trailers and Transportation; Technical. General Q & A; Do It Yourself, Boating on a Budget; Drives and Lower Units; Electronics; Fiberglass and Paint; Prop Talk ... Offshoreonly Industry News; General Boating Discussion; Classic Offshore; Insurance and Finance; Poker Runs and Boating Events; Boating Safety; Beware and Stolen; Vendor Talk; Trucks, Trailers and Transportation; Technical. General Q & A; Do It Yourself, Boating on a Budget; Drives and Lower Units; Electronics; Fiberglass and …Sep 23, 2007 · General Boating Discussion - Life Span of a 500 EFI - I posted this post in the Formula section, but I think it will may better fit here since the engines are installed in a wide variety of boats. If properly maintained, what is or should be the life span of a 500 EFI engine. What are the recommended oil change.Prop Talk - Best Prop For IMCO SCX - Hope everyone is having a good boating season! It's been awhile since I've been on any forum so if there is a tread on this I apologize. I have an eliminator 25 Daytona newer bottom with 1000 hp 565 BBC blower motor with a full IMCO SCX,blueprinted -2 1400 lower, it is one of theQuote: Originally Posted by Powerquest_Baby!! Early 502's (Mark IV and Gen V's) were rated at 425 at the flywheel and 390 at the prop (carb). This number grew in the early 90's with the advent of EFI. The EFI 502 went up to 415 at the prop and the 454 Mag went to 385 hp at the prop. Powerquest is correct this is how they were rated.The Fora platform includes forum software by XenForo. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. A forum community dedicated to performance boat owners and enthusiasts. Come join the discussion about offshore racing, performance, modifications, builds...East Coast B. Volvo 8.1 GXi vs Merc 496HO, your thoughts? I just did some pricing on a 26' 5600lb boat and it has both the Volvo and Merc engines as options. I quickly noticed that the Volvo 8.1 GXi is a mere 5hp less at 420hp and $4,000 less than the Merc 496HO. What is everyone's thought on the GXi vs 496HO from a mechanical ….

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