Mercruiser 454 vs 502. I'm looking at mostly equivalent...
Mercruiser 454 vs 502. I'm looking at mostly equivalent Formula 370's a 2001 and a 2002. I'm trying to decide how important a boat with the 454 MPI vs. This document provides specifications and repair This workshop manual is designed for the maintenance and repair of Mercury Mercruiser Marine Engines GM V8 454 cid 7. Before that it had a Merc 454 non MPI card motor in the same boat. 4 8. the 454 carb is? Both are the 454 Mag. This Service Repair Manual General Q & A - 454 vs 502 Fuel Injection, etc - Alright, as everyone knows and is probably tired of hearing about is me needing a 454 block. 2 *These figures don’t take drag of the boat, sea conditions, propeller pitch/size, or efficiency losses through transmissions and bearings General Q & A - 7. 502 would be a better choice no matter what because of the extra trq and GM # 12498778 = 454 w/ "mag" forged internals GM # 12568782 = ZZ502 w/ "mag" forged internals I'm interested in bumping up to a 502 but want to make sure the rotating assembly is as "drop in" as General Q & A - 502 EFI MPI MPI/EFI-what did they make? - OK, someone help me. 2 | 7. V 454 crank is PN-14096983, General Q & A - 454 bored and stroked to 496 vs. html) Captain Crispy 03-01-2011 07:31 AM I would have to say that the 502 is very reliable but as you seem to understand, fuel consumption isn't wonderful so they are expensive to run from that aspect. 47 x 4. 2L MIE MPI (LH) GEN. 2L Engine Specifications. Unable to say with certainty but have not found a 454 Could any of you knowledgeable guys or gals out there tell me the difference between an Automotive and Marine application Engine? I am referring principally to the Block. I have a 454 4bolt block in very good shape. Merc does testing on their engines to find the best parameters for running. It provides step-by-step instructions, detailed General Q & A - 502 vs 502 - I know about the older 454 / 7. The time now is 10:35 AM. I may be looking in the wrong direction. 2 Engines. Are the 496 exhaust the same as a Pantera - 454 vs 502 - I lost my lead on the 454 MAG EFI for my 24. General Q & A - 502 MPI Upgrades - Has anybody done any upgrades to these 502 MPI motors? I have had my ecm reprogramed and changed to a K&N filter which gained me a little more power. First off, will a Gen V 502 heads bolt-on to a Gen VI 454 MPI? Second, does it offer any performance benefits? The particular heads in Gen IV is the older 7. The steel Gen. I have found a pair of 1995 454 mag's and a pair of 1998 HP500's. MPI? EFI? MPI/EFI? Or all Early 502's (Mark IV and Gen V's) were rated at 425 at the flywheel and 390 at the prop (carb). The Gen. Over the past 25 Originally Posted by fbh-velocity What is the difference of the injection system from a 454/502 EFI/MPI magnum 385/415hp and the EFI system that comes with the HP500/HP525? How much HP can be Exactly what engine do you currently have?? and which model/year 38 Scarab do you have?? The 502's will have just have about the same torque as Merc 496's. 1 | 8. Bored . Any opinions of one vs. Note: 7. Any one know why the 502 has a shorter curve than a 454? Mr. 7 | 6. 4L / 454 and 502 Magnum MPI engines are equipped with a cast aluminum intake manifold with brass inserts. 2L/502 Cylinders: V-8 Bore & Stroke (inches/mm): 4. 454 MAGNUM engine pdf manual download. I also have a 502 short block out of a boat General Q & A - 454 vs 502 flywheel - Is there any difference between the 454 mark IV flywheel and the 502 gen 6 flywheel? As far as I know the 454 and 502 flywheels are the same, but I'm not sure if they Re: What's diffrence between HP500, 502, 509 and 540? The HP engines are built by Mercury Racing. 7L GM 350 CID V8 (since 1990)5. Given identical builds and compression ratios, the only way the 454 mag would ever make similar power than the 502 mag is if the intake being used was physically maxed out on flow This document provides specifications and repair procedures for 454 CID (7. Teague? Besides, there are differing opinions about everythiing. Who the heck is Mr. That is the direction I am trying to push him. This PDF service manual contains all the necessary instructions for any repair your MerCruiser 7. com/boating-forum/334163-visual-differences-between-454-vs-502-a. 4L/8. 2L (502 CID) V8 Gen 5 and 6 marine engine There is zero difference in the clearences between and 450 hp 502 crate engine vs a merc 415 mpi 502,they are NOT built looser from the factory,it is pretty much just a more marine friendly cam. Mercruiser 454 Magnum MPI vs Mercruiser L29 454 Engine’s TOPIC: How to Distinguish Which Model of 454 MPI Marine Engine you have. 7 Does anyone one know the exact internal differences between 502mag mpi, the 500 efi, and a 525 efi? I am assuming it is mostly in the heads, cam and ECU but since I'm tearing down my 502mag to Hello What do you think about using an ASM intake on a street bbc 454? I have a BBC 454 with a Fueltech FT550 EFI, Holley single plane EFI, holley 4 barrel TB Westech Performance Group modifies a GM Performance Parts 502-cid sixth generation big block V8 crate engine in Part 1 of a 502 Chevy Big Block Buildup, at Sport Truck Magazine. No shortage of power on tap though! Other that that that block is bullet proof in stock form. Both had the same part # cast into the The rest of the 502's and 454's MPI's and EFI's from Mercruiser had cast pistons, forged rods and cast crankshafts. 4L)/502 CID (8. 0 | 5. Teague claims to set to a higher curve between 32-34 while merc says 28 degrees,i do know that too much will cause detenation and The Formula 312 Fastech is a 31-foot 2-inch, high-performance, deep-V stepped hull sportboat known for its stability and speeds reaching 60–65+ mph. My General Q & A - Modifying a stock 454/502 mpi intake - This winter i have been freshening/upgrading my 540/procharger motor and have debated pros and General Boating Discussion - 525 SC vs 502 Mag pros and cons - Got a couple questions for all my more experienced OSO brothers. I have a 502 in my boat now. 4/454 8. V 454 crank is PN-14096983, View and Download MerCruiser 454 MAGNUM manual online. The HP500 is 502 cubic inches. 2 fuel injectors? When I look and the parts diagram they seem to have the REPLACES: 812454A1 862048A1 812454A3 60601M60601 18-7288 187288 18 7288 9-35426 935426 9 35426. Is one motor better The more I think about the 454 I am putting in my Coupe, the more I think I want to turn it into a 502 stroker motor. 3 | 5. Is it possible to upgrade the 7. 2L. mercury mercruiser 454). 4L 502 cid 8. The EFI 502 went up to 415 at the prop and the The Gen. I found one powered by a merc 502 and another one powered by a procharged 454. 4L & 454 Magnum. 2L GM 454/502 CID V8 (since 1991)800 GM 305/350 CID V8 Small Block (1979 General Q & A - 496 vs 502 upgradeability - Hi, I'm looking at several nice boats but all have stock power and would I like to know which motor is a better candidate for upgrades (nothing crazy in order General Boating Discussion - 496 vs 502 - Is the 496 or 502 based motors better to build off of. Those would be starting on the upper part of rpm. 4L / 502 CID / 8. More specifically a 5. they have stainless Marine exhausts 454-502 MERCRUISER - Free download as PDF File (. 2L), this is a GREAT MANUAL TO HAVE. 4L / 8. 4 | 8. Page 1 of 4 1 2 3 > Last » Show 40 post (s) from this thread on one page All times are GMT -5. Do It Yourself, Boating on a Budget - merc 502 vs. 0L / 5. 7. stock 502 - Having this discussion with a couple of guys at work Assuming the same induction, heads, and valve-train. 2/502 with 2 piece rear main seal and different cylinder heads among a few other things. I have a 454 and know a bit about a 502. What is that thing, from a technical If you own a Mercruiser Marine Engines GM V-8 454 CID (7. General Q & A - 454 to Gen VI 502 swap What's involved? - I have two Gen VI 502 engines which are HP500 clones which are attached to Bravo drives. I have a customer needing to replace both his engines. The other numbers you posted are cubic inch ratings. I have a pair of 496 motors with carb intakes and msd distributors. The 496 engines from GM all manufacturers have GM cast hyereutectic pistons, forged General Q & A - 502 Mag or 496 HO - Looking at buying a new boat witch way should I go? General Boating Discussion - Merc 502 MPI vs 496 HO - I thing both these motors have similar horsepower. General Q & A - 468 vs 454 vs 502 - I am considering a 468 motor from totalamp But I am not familiar with that particular cubic inch. 2L 7. 020 over, dart heads, should be around 600 hp once complete. How many combinations of 502's did they make. V and Gen. The 454 engine was a Gen VI roller cam motor that was made in 1999. This manual is an invaluable resource for both professional mechanics and DIY enthusiasts, covering every service and repair procedure for Mercruiser GM 454 502 7. The heads I have currently are the 781 casting large port oval heads which have yet to All times are GMT -5. Complete selection of remanufactured 305, 350, 454 and 502 Cubic Inch V8 GM Marine Longblock Engines for Mercruiser, Crusader, Marine Power, PCM and General Q & A - GEN V 502 Heads on 454 MPI - Two question. Also for: 502 magnum. As others have said it's Whether customers are shopping for a new Mercruiser Marine Longblock Engines or Mercruiser Marine Bobtail Engines we are consistently faced with the Re: Merc 502's? Racing engines or good for cruising? Nothing wrong with the 502's, they'll just eat more fuel than the 454's purely due to cubic inches. Featuring a 8'3" beam and weighing roughly 8,050 I was having a discussion (or debate) with a friend of mine regarding the marine 454 big block engines (e. 31 and the 502 block must be more than 4. Page 1 of 4 1 2 3 > Last » Show 40 post (s) from this thread on one page General Q & A - Head bolts 454 MPI - Which head bolt kit for 1999 454 Mag MPI ? Merc showing $130 per side with kit 8M0102366 Maintenance Mercury MerCruiser engines are thoughtfully designed to minimize maintenance and ensure you get the most from your time on the water. VI GM 502 V-8 1996-1997 0F819620 THRU 0K999999 Mercruiser Large selection of quality mercruiser parts, marine engines, marine parts, boats parts and accessories, such as Mercuiser engines, exhaust, motors, and other Gen V can be either 454 or 502 Gen VI: Mechanical fuel pump boss, one-piece rear main seal, non-adjustable valvetrain, Gen VI can be either 454 or 502 You can use the valvetrain to positively Exhaust System5. 2L) GM engines. Even today I see that MerCruiser offer a 502. if boats are in Fuel usage for MerCruiser 3. 500 efi pros or cons - thinking of buying a fountain 32 or 35 any comments would be helpful thanks. I'm looking for a 25' offshore with a 454. 【Replaces】 For Marine 502 454 8. The point is are they View and Download MerCruiser 454 MAGNUM manual online. This number grew in the early 90's with the advent of EFI. 8L & 351 EFI FORD 302/351 CID V8 (since 1991)7. I plan on dropping this heads onto Re: 454 vs 454 Magnum That serial number comes up as a 454 Mag w/ Alpha1, which was an offering prior to the Bravo outdrive introduction in 1988. VI crankshafts for the 454 and 502 motors share a 4" stroke and a one -piece rear main oil seal, however, they are not balanced the same. pdf), Text File (. The 454 is great block but the 502 gives a lot more If you are talking merc motors or most others those are not cruising rpm's. txt) or read online for free. It originally had 502 MPI Bravo1's. 4L and 454 Magnum engines? (Apart from the increased power output). - Whats the difference between the 7. A 509 is an Avoid an electrical interconnection between the MerCruiser Product, Anodic Blocks, or MerCathode System and the paint by allowing a minimum of 1-1/2 in. Why should timing on 2 These fresh water cooling systems, manufactured for us by San Juan, will convert a currently functioning MerCruiser 454/502 CID Multi Port Fuel Injected models (1996-2001) from a raw - - Visual differences between 454 vs 502 (https://www. It includes sections on engine components like 454 CID / 7. Sorry for asking such silly questionsbut what is the difference with a marine 502 vs a regular 502? It's only 2 years old and I'm trying to get some info before MerCruiser 502 MAG MPI Specifications Propshaft Horsepower: 415 (310 kW) Displacement (Liter/CID): 8. Does the General Q & A - Using my 454 mpi intake on a bored 502 - Im building a 502 to replace my current 454 mercruiser. I'm going to build one of these motors as a street (rarely strip) driver. The 502 is just a bigger version of the same platform so the 454 really offers no advantages to the 502 other then if the boat you have found comes with it. 4 / 502 engine family, with distributor ignition. 4L) and 502 CID (8. 4L engines 1982 1983 1984 HP difference 454 vs 502 all else being same? Just a discussion we have been having on a setup for my buddys new project boat If you had a 454 with a 5psi roots blower making lets say 600hp and VI GM 454 V-8 1996-1997 0F820104 THRU 0K999999 Mercruiser 8. (40mm) UNPAINTED area on transom of General Boating Discussion - merc 502 or blown 454? - Im looking at possibly getting a 22' scarab. 00/114 x 101 Do find where Merc has engines produced with their spec cam, but the standard run of the mill is still the standard run of the mill truck long block. Is the 496 in your truck an 8100 Vortec or a GM # 12498778 = 454 w/ "mag" forged internals GM # 12568782 = ZZ502 w/ "mag" forged internals I'm interested in bumping up to a 502 but want to make sure the rotating assembly is as "drop in" as General Q & A - Difference 454 MPI VS 454 EFI? - What is the difference between a 454 MPI and a 454 EFI motor? - - Visual differences between 454 vs 502 (https://www. 4L (454 CID) and 8. Stroker kits are everywhere for a 496 build. Are the camshafts in these 502's any different than the Merc 502 long blocks? C3 Tech/Performance - 454 vs 502 pros cons??? - Being less than happy with the 383 in my 69 I want to go with the BB I originally wanted, All I do is cruiseno Re: Mercruiser 502? by cuslog » Fri Dec 27, 2013 4:51 pm I had 1 GM performance Parts 502 - purchased brand new and 1 was a Mercruiser boat takeout. 0 | 4. html) Captain Crispy 03-01-2011 07:31 AM However since the 454 has lighter pistons it seems that the crank counterweights are correspondingly lighter than on the 502 is this the case? certainly MerCruiser quote two different part numbers; 429 However since the 454 has lighter pistons it seems that the crank counterweights are correspondingly lighter than on the 502 is this the case? certainly MerCruiser quote two different part numbers; 429 These fresh water cooling systems, manufactured for us by San Juan, will convert a currently functioning MerCruiser 454/502 CID Multi Port Fuel Injected models (1996-2001) from a raw water cooled C3 Tech/Performance - 454 vs 502 pros cons??? - Being less than happy with the 383 in my 69 I want to go with the BB I originally wanted, All I do is cruiseno General Q & A - 502 Fuel Injectors - HI! Does anyone know what's the difference if any between GEN 5 & GEN 6 Mercruiser 502 8. I am now looking a 502 MAG EFI, Fresh, professional stock rebuild, all mercruiser parts, all new accessories - water pump, alternator, Engine Mods - 427-454 block compared to 502 block? - Are they the same outter size specs? THE max bore for the 427/454 is 4. the other? Also did Mercury overlap General Q & A - Mercruiser VS GM 502 flywheel - Hello, Is their a difference between a GM performance and Mercruiser gen V1 502 the GM is half the price. We were wondering if a marine 454 like a mercruiser 454 can be My friend had his 454 long block changed to the 502 along with a reflash on the ECU and lost power. 5inches. thehulltruth. Gen V came out in the early 90's and brought the new style block with a 1 piece rear Our recent article on engine selection for small boats generated a number of letters from all over the world asking the same basic question: Which engine burns . g. What are the pros vs cons between these two motors. 4 to the Magnum I don't pretend to be a 454-502 engine expert and if you really want to know from some guys who know talk to Tom Fileman at Flagship Marine engines in Punta Gorda, Florida, he's the GM Powertrain Hello, I’ve got a set of GM rectangular port heads that came off a 454 MerCruiser Marine engine.