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    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    I do not have a picture of the heads and I am away from the shop right now. I did grab the casting number yesterday though. The head # is 10141279
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    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    What intake should I look for? Most of the aluminum intakes are showing for yaer through 1995, none later.
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    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    I picked up a used L29 from a 2000 silverado. I will be leaving it stock for now, minus a new intake & carb. I am planning to go with a Edelbrock 1410 but am having trouble figuring out which intake I should go with. I have found two cast iron ones (part# 333841 & 14087487) but am not sure if...
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    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    I may have to stick with the truck cam. According to that article you also have to change the valve springs and retainers. Also it looks like most of the HP gain is outside of the WOT throttle range of the boat which is 4200-4600 I believe? Maybe that range is for the stock engine only though...
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    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    Would a gen VI l29 engine from a 1ton truck swap over with my accessories? No matter which way I go I will need a new carb (was thinking edelbrock 1410) and could swap the cam before I put it in the boat.
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    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    But would that be a viable option for my boat? Somebody has already swapped the gen 4 engine into it before. I do not know how it worked for the boat though. My current boat (1995 Century Arabian 240) only came from the factory with a 7.4/bravo 1 but when I got the boat it had a ~2000...
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    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    I do not know much about engine internals (which is why I am always here!) but the engine in question I am talking about they replaced the cam, heads, lifters, intake, and carb going from 330hp to 560 hp on the dyno. The entire kit was $3600 if I remember right. I am sure the marine...
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    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    I should have stated the boat I have too. It is a 1997 Maxum 2800 with a single 454 & bravo 3. I believe torque would be more important than HP for this wouldnt it? I am not worried about going very fast, but would like to be able to get on plane easily with a few people on board. I have...
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    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    I will look around for a while for different engines and see what will be cheapest/easiest way to get on the water come spring. I have found a complete ready to drop in used gen 4 (I believe) for about 3k. I'd like to find a gen 6 for a similar deal but that probably won't happen. I may go...
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    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    Would the accessories swap over to gen 6? I had found one with the oil pan, timing cover, and valve covers included but would need to swap the alt, p/s pump, mounts, etc.
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    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    I found a decent deal on a rebuilt gen 4 (about $2500 shipped) but after the core charge it wouldn't be such a good deal. I would assume with an internally cracked block they wouldn't accept it as a good core. The gen 5 longblock was only $2200 shipped, but it sounds like it may be too...
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    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    According to that link it looks like the casting number should be on the port (drivers side of vehicle.) That is the first number I came up with, the only number in that location on the starboard side is M258. The closest number I could match up to the number on the port side of my block is...
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    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    I looked this morning and did not see a number like you described. I think there was a smaller 3-4 digit number starting with the letter M. I am heading back to put the engine on a stand and take a better look.
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    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    I will check it tomorrow when I get to the shop. yesterday I took a quick look for numbers (mostly just the serial number) and grabbed a picture of a number where you are describing but it is on the port side. It is hard to read but I believe it is 615445. I will look at the otherside...
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    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    I was planning on needing to replace the exhaust, intake, and oil pan anyway so I could buy those for the gen V. Also the boat already has an electric fuel pump with a block off plate over the mechanical fuel pump hole on the engine.
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    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    I recently purchased a 1997 Maxum with a bad 7.4l/bravo 3. I am exploring my options for repower and came across what looks to be a good deal on a rebuilt gen 5 long block. I believe my current engine in the boat is a 1988-1991 gen 4 (serial # C602211) I am already planning on needing to...
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    Merc 7.4l water mixing with oil & low compression

    Hello guys, I just purchased a new project for the winter so I am sure I will have a lot of questions along the way. The boat is a 1997 Maxum 2800 SCR with a carbed 7.4l/bravo 3. I bought it knowing it had an issue or bad engine. Was told water was mixing with the oil. I never tried to...
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    New Sierra Merc 5.7l Starter Not Engaging Flywheel

    I am having starter troubles on my boat. Engine is about a 2000 model 5.7l carb engine. Towards the end of the season last year the starter started to sound bad. It got to a point where if it cranked for more than a couple seconds the appendix would disengage from the flywheel and just spin...
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    Where can I find these tilt cylinder washers?

    I noticed I was getting water in my tilt/trim fluid over the summer and when I brought the boat home for the winter I decided I was going to reseal the cylinders. When I pulled the first cylinder apart I believe the cap (not sure the actual name) was installed backwards in the tube and pressed...
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    Reinforcing Cleats?

    My boat originally had the standard 4 cleats from the factory, but someone has added another 4 folding cleats for fenders over the years before I got it. The hull is stamped "Fender Only" above the 4 added cleats. I am looking to strengthen the rear folding cleats to be able to tie up to those...
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