scoflaw
Well-Known Member
- Aug 10, 2011
- 6,395
- Boat Info
- 1999 Powerquest legend 260 sx 502 mag
2005 Baja 242 islander 496
- Engines
- 502 mpi Bravo 1
496 mag B1
Better pic would be helpful
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100% wet joint.Are these not dry joint hole fittings (if you look real close)
Not to debate you, but I disagree on this. If you have to cut bolts, scrape gaskets, especially off of the head, and don't know what you are doing you can mess this job up. I agree with @douglee25 and others here. It's also easy to prep and paint the bottom of a boat, heck I did it in high school for $2.50 when I worked weekends for a marina. Not a job I am going to do now though.If you can change a tire, you can probably change your own manifolds.
Check out YouTube, I’m sure there’s plenty of videos so you can see what’s involved. Nothing special, just heavy stuff. A second set of hands is a big help.
Check partsvu after getting the part numbers from mercruiserparts.I'm pricing out riser and manifold parts for my 2004 340 DA (MerCruiser 8.1L Horizon) and I'm getting quotes of ~$8900 for parts and ~$2700 for labor. Give or take a few hundred on labor depending on the local marina.
Double-checking parts prices out on the web I'm finding the same parts prices on some of the top search hits.
Where's the best source for these parts?
Check partsvu after getting the part numbers from mercruiserparts.
Also, there is a kit that includes a bunch of parts at a better price:
Mercury - Exhaust Manifold Conversion Kit - Water Rails to Cast Iron Exhaust Manifolds w/o Water Rails - Fits MCM/MIE 496 Mag & 8.1S Engines - 866178A02
SKU: 866178A02
See if that kit will work for you.
If you have the stainless steel elbows, I have had multiple people tell me that you do not need to change those. I changed them, since they did have rust on them.
Hey douglee, just processed my order with Nuwave. You were 100% right....amazing place to do business with. I would highly recommend anyone working on a similar project to call Nuwave Marine and work with them.
Hey douglee, just processed my order with Nuwave. You were 100% right....amazing place to do business with. I would highly recommend anyone working on a similar project to call Nuwave Marine and work with them.
Hey @jmauld, thanks again for the tip. I'm able to use my existing SS elbows and just went for the manifold kits. HUGE difference. I will update the post on how the install goes....hoping to get it done next week.Thanks jmauld. I will look into the kit; was suspecting there were kits but it's confusing.
Yes I am going to do the work myself. It's clearly worth my time.Are you planning on doing the work yourself?
If so, pull two of the longer bolts out of one of the manifolds. Cut the heads off of both bolts, and use them as alignment studs for installing the new gasket/manifolds. The manifolds are heavy and difficult to hold in place otherwise.