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Quad 350 OR 400R - Warranty VS. Performance

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Quad 350 OR 400R - Warranty VS. Performance

Old 12-23-2018, 01:04 PM
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I would say 400s, anyone who can afford that boat will want 400s.
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Old 12-23-2018, 01:32 PM
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Originally Posted by pooldoo73 View Post
I see a quad 400 42í Invincible at the shop close to my house quite often. It has a lower unit dropped on it at least 3-4 times a year. Always an outside engine. It sure quads are the right choice on that hill, Whether 400 or otherwise.
Does that say something about the boat or that shop? I know that the quad engine boats we maintain, 42ís included, donít go through lowers like that. If thatís the quad 400 42 Invincible Iím thinking of, it suffered no lower unit issues when it was under our care.
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Old 12-23-2018, 03:25 PM
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Originally Posted by davidwademarine View Post


Does that say something about the boat or that shop? I know that the quad engine boats we maintain, 42ís included, donít go through lowers like that. If thatís the quad 400 42 Invincible Iím thinking of, it suffered no lower unit issues when it was under our care.
sounds like the outside motors need to be tucked a little until the dogs stop barking.
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Old 12-23-2018, 03:27 PM
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I know a few people that would bark their engines in a bath tub, some can’t be helped.
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Old 12-23-2018, 05:07 PM
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We have a 390 Nortech with triple 350ís. Iíve run a best of 78 with low fuel and ideal conditions but can run 73-75 all day. The same boat with 400ís runs a bout a max of 83 so itís about a 5mph difference for the 390 NT hull. We got 8 year warranty included on the boat with a promotion and it would have only been 2 years if we did the 400ís.

If I remember correctly, to get the max extended warranty on triple 400ís would have been about the price to just buy a whole new 400.

Also remember, the 400 is only 400hp with premium fuel. Anything less and it derates to 350hp. And they will perform the same all the way up until the upper end of the RPM range. Iím pretty sure the 400hp is only really there for WOT
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Old 12-23-2018, 05:10 PM
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The 8 year warranty are a biggg deal..! But my hopes with Miami show around the corner that they will introduce something new..
And maybe extends the 400s to the 8 year warranty option OR maybe a while new motor based on the v8 design..
If they did a v8 400/450 that would be SHWEET as they are much thinner then the vrods & might help with some of the "bark" issues mentioned..
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Old 12-24-2018, 05:14 AM
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Originally Posted by tripsTOquads View Post
The 8 year warranty are a biggg deal..! But my hopes with Miami show around the corner that they will introduce something new..
And maybe extends the 400s to the 8 year warranty option OR maybe a while new motor based on the v8 design..
If they did a v8 400/450 that would be SHWEET as they are much thinner then the vrods & might help with some of the "bark" issues mentioned..
The L6 and V8 are the same width, both mount on 26Ē centers. Outside motors on quad boats are constantly catching air, not much you can do about it, just enjoy the sound they make when they clear.
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Old 12-24-2018, 07:29 AM
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Just be patient. Miami is just around the corner. The 350 Gen 5 is a great motor but they didn't come up with a new motor to be not as good as what they had.
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Old 12-24-2018, 07:48 AM
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Originally Posted by Perf40 View Post
Just be patient. Miami is just around the corner. The 350 Gen 5 is a great motor but they didn't come up with a new motor to be not as good as what they had.
THIS! As boats and sundance said earlier the Gen 5 Verados are not really optimized for very large/heavy hulls and are on the way out. So yes the 350's will have the longer warranty but they will "soon" (figure around 24 months) be the old designs. Wait till Miami and be prepared to bang down Invincible's door to get your boat on the list for allocations for the new motors.
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Old 12-24-2018, 08:28 AM
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I have no clue about this company but have seen cool videos. Search for USP marine tuning online. They say they can turn that 350 verado into a 450 and not void the warranty. You can be my 100k guinea pig if you decide to do it!
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Old 12-24-2018, 11:08 AM
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the invincible 42 center cabin weighs in at 13,800 lbs which is not especially heavy for a 42 foot boat. I recently tested the 39 (12,000lbs) with triple 350 mercs and it had no issues getting up on plane or running and performance was outstanding-also the 39 got up on plane with 2 engines and ran over 35 mph without flooring the throttles. also, there are several articles that tested the 42 center cabin with trip's and it performed exceptionally well and topped out at around 60 mph. not trying to get into a debate as to what configuration is best, etc.-only providing information -my previous boat, a 35 foot express with twin 350 Yamahas , weighed in at about 15,000 lbs, was a little slow to plane and topped out at about 50

as an aside, the 39 got over 1.1 mpg with a pretty full load (6 full size adults, fuel and no other gear), choppy 3-4 conditions at 40+ mph
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Old 12-25-2018, 06:00 AM
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Doesn’t matter what Merc releases at Miami...I’d be shocked if Invincible could deliver a new Merc release by July 2019. That’s not a knock on Invicible. In the last year, they have thrown Verados on a ton of deliveries but I’d be surprised if they are first on the list of allocation for new product. Have they even delivered any V8 300 boats? Last summer, the expected delivery of V8s was like 6 months out.

Sundance, DavidWade and Boatsareawesome all seem in agreement on the 350’s...having recently ordered a boat with 350 x 3, I could find no compelling reasons to go with 400’s over 350’s...dudes blindly suggesting 400’s probably haven’t done any research on the subject.

Soemome mentioned resale...if I were looking at used boats, I’d pretty much eliminate 400R boats...no way would I pay more for one rigged with 400 vs 350’s.

good luck. Should be a killler ride
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Old 12-25-2018, 06:05 PM
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Originally Posted by jcozart View Post
I have no clue about this company but have seen cool videos. Search for USP marine tuning online. They say they can turn that 350 verado into a 450 and not void the warranty. You can be my 100k guinea pig if you decide to do it!
EXACTLY! Love the tuning idea but NOT VOIDING WARRANTIES?
Thats what they say until you blow a motor up & mercury says something differently
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Old 12-25-2018, 06:08 PM
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Originally Posted by Lazy Bones View Post
Doesnít matter what Merc releases at Miami...Iíd be shocked if Invincible could deliver a new Merc release by July 2019. Thatís not a knock on Invicible. In the last year, they have thrown Verados on a ton of deliveries but Iíd be surprised if they are first on the list of allocation for new product. Have they even delivered any V8 300 boats? Last summer, the expected delivery of V8s was like 6 months out.

Sundance, DavidWade and Boatsareawesome all seem in agreement on the 350ís...having recently ordered a boat with 350 x 3, I could find no compelling reasons to go with 400ís over 350ís...dudes blindly suggesting 400ís probably havenít done any research on the subject.

Soemome mentioned resale...if I were looking at used boats, Iíd pretty much eliminate 400R boats...no way would I pay more for one rigged with 400 vs 350ís.

good luck. Should be a killler ride

Never thought about the issue of getting an allocation on new motor from mere...
I was at factory & don't recall seeing any 300 V8's but most motors were 350 Mercs / 400 mercs & very little 350 yamis
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Old 12-27-2018, 06:31 AM
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Originally Posted by tripsTOquads View Post
EXACTLY! Love the tuning idea but NOT VOIDING WARRANTIES?
Thats what they say until you blow a motor up & mercury says something differently
Yep, I have a hard time believing merc is going to warranty a 350 that has been modified to 450! USP is saying they get all the extra power from flashing the computer system to get different performance and that you can "unflash" it if you take it to be serviced. Like I said, not an option for me but very interesting. I never get to use any speed when I fish anyway because its always rough!! And in my case the boat will already do 70, so what does 7-8 more MPH really matter!
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Old 12-27-2018, 09:32 AM
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Originally Posted by jcozart View Post
Yep, I have a hard time believing merc is going to warranty a 350 that has been modified to 450! USP is saying they get all the extra power from flashing the computer system to get different performance and that you can "unflash" it if you take it to be serviced. Like I said, not an option for me but very interesting. I never get to use any speed when I fish anyway because its always rough!! And in my case the boat will already do 70, so what does 7-8 more MPH really matter!
The other question is how will the LU's hold up after adding another 100hp by flashing the motors? I have the option of upgrading the computer to another 50hp on my 300xs motors. Never did it because 1) what it does is increase the rev limiter, 2) I hate being down a motor and not being able to use the boat. 3) after your warranty expires you are buying those units out of pocket. So I wouldn't touch it especially if you have a quad boat and don't need an extra 400hp when you already have 1,400 hanging on the transom with 8 year warranty. If you need that extra 7-10MPH then buy a go fast and hit the 100's not a CC fishing boat.
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Old 12-27-2018, 01:49 PM
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Originally Posted by jcozart View Post
Yep, I have a hard time believing merc is going to warranty a 350 that has been modified to 450! USP is saying they get all the extra power from flashing the computer system to get different performance and that you can "unflash" it if you take it to be serviced. Like I said, not an option for me but very interesting. I never get to use any speed when I fish anyway because its always rough!! And in my case the boat will already do 70, so what does 7-8 more MPH really matter!

With these computers now a days you can see if the ECU has been played with. I have a AMG & a lot of buddies have told me to flash the ECU.
I never did it because I don't want the liability of something blowing up & I'm at a total loss.. Same rule applies for the outboards..
If they don't harm the engine then why do you need to FLASH it back prior to service? Additionally, what a pain in ass to have to flash & unlash your boat all the time
God knows how often one is in service.
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Old 12-27-2018, 04:37 PM
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You gain 200HP and maybe 5 MPH @ WOT, I'd go with the 350's.
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Old 12-28-2018, 03:34 AM
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If production is an issue with the V8's then yes go with the V6-350's. If it were me I would still wait for a V8 400+, they will be slightly Lighter and I know Im old But still believe “ There's no replacement for displacement ".
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Old 12-28-2018, 06:54 AM
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I'm sure you can order the boat at the show with motors TBA.

One rigging tip, it you do go for the I6 over the V8 option, rig out the boat with 2' longer cables and engine harnesses. That way if you do decide to go with V8's down the line it's super easy plug and play rather than cutting out your factory rigging.
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