Makai underpowered and unreliable?

[TXSurf4]

The 450 offered in SC boats is actually the 460 with a smaller diameter exhaust. To my understanding it is more than just different "tuning" when comparing to the 400. If I remember correctly it has different heads, cams and a couple other parts. I will look for the info I had on it as I did a fair amount of research before I opted for the 450. I know in 2019 when we ordered our Makai one of the big draws for the 450 was that it was already mated with the 1.76 Transmission. I haven't ridden in a 2020 with the 400 and the 1.76 yet so I can't compare but I know that was a solid move by SC.

[larry_arizona]

440 was the tune only delta 23 ft lbs over the 400 for $7400.

The 450/460 does have different hard parts and 91/93 octane tune. Not sure hp/tq numbers on the 450 with smaller exhaust.


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[TXSurf4]

440 was the tune only delta 23 ft lbs over the 400 for $7400.

The 450/460 does have different hard parts and 91/93 octane tune. Not sure hp/tq numbers on the 450 with smaller exhaust.


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When did they stop offering the 440? I know when I started to look at the SC brand which was MY 2019 they only had the 400, 450, and 575.

I know on the 450 the torque is 450 lb-ft. On the HP I don't remember the exact # but I know it is ≥ 400 HP.

On Moomba's site they say the 450 is +46 lb-ft and +60 HP over the 400 which would put the 450 at 450 lb-ft and 410 HP.

[larry_arizona]

When did they stop offering the 440? I know when I started to look at the SC brand which was MY 2019 they only had the 400, 450, and 575.

I know on the 450 the torque is 450 lb-ft. On the HP I don't remember the exact # but I know it is ≥ 400 HP.

On Moomba's site they say the 450 is +46 lb-ft and +60 HP over the 400 which would put the 450 at 450 lb-ft and 410 HP.

2018 was last year for 440

If SC says +46 ftlbs and + 60hp that makes the 450 450 ftlbs and 410hp, so it’s only 2 ftlbs less than the 460 which is 452/410


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[Prospersigman]

I have owned 3 SC boats...2016 Moomba Mojo with 400, a 2017 Supra SA with 400 and a 2018 Supra SL with the 575. All of my boats have had an additional 850lbs of lead in them and we usually run a crew of 2 families for a total of 8 people (4 adults/4 kids ages 8-13). This debate has gone on over the years on this forum time and time again. The people with the 400 typically say they have never needed more power...I disagree. With both my 2016 Mojo and 2017 SA that had the 400 in it I had to flip it to wakeboard advanced mode to drop all 3 plates down to get on plane and move people to the bow or it would take forever. The other option was to drain half the ballast out to get on plane.

My good buddy bought a 2019 SL450 (early model that does not have the 1.76:1 tranny). It still has similar issues that the 400 had getting on plane but is noticeably better than the 400 was in my other 2 boats. We are in the DFW area so obviously elevation is not an issue for us.

My 575 is unbelievable...never an issue getting on plane not matter how many people in the boat with 3500lbs of ballast and 850llbs of lead. I would love to go 575 again but with the 1.76 tranny and the ability to run a 16x17 prop I wouldn't pay the upcharge again. Even though the whine of that blower on the 575 is worth the price!!!

If you go Makai with the 5200lb dry weight, 4000lbs of ballast and from what I read there is a definite need for lead or additional ballast (lets say 800lbs of lead), along with 370lbs in fuel, then gear and people you are looking at roughly 11,000 pounds I would say the 450 is a must...I am sure there will be people that disagree.

[TXSurf4]

2018 was last year for 440

If SC says +46 ftlbs and + 60hp that makes the 450 450 ftlbs and 410hp, so it’s only 2 ftlbs less than the 460 which is 452/410


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That is why is said "On Moomba's site they say" lol that does seem awfully close. So i reached back out to Indmar and the 450 is 400 HP and 447 lb-ft of torque.

[larry_arizona]

That is why is said "On Moomba's site they say" lol that does seem awfully close. So i reached back out to Indmar and the 450 is 400 HP and 447 lb-ft of torque.

Thanks for finding that data.

400= 350hp/404tq 89
440= 398hp/427tq 89 $7000 option 2018
450= 400hp/447tq 93 $8500 option
460= 410hp/452tq 93 NA
550= 510hp/580tq 93 $21000 option

Moomba option prices slightly lower.


On the 450,460 and 550, you can run 91 with some loss of performance.


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[TXSurf4]

I have owned 3 SC boats...2016 Moomba Mojo with 400, a 2017 Supra SA with 400 and a 2018 Supra SL with the 575. All of my boats have had an additional 850lbs of lead in them and we usually run a crew of 2 families for a total of 8 people (4 adults/4 kids ages 8-13). This debate has gone on over the years on this forum time and time again. The people with the 400 typically say they have never needed more power...I disagree. With both my 2016 Mojo and 2017 SA that had the 400 in it I had to flip it to wakeboard advanced mode to drop all 3 plates down to get on plane and move people to the bow or it would take forever. The other option was to drain half the ballast out to get on plane.

My good buddy bought a 2019 SL450 (early model that does not have the 1.76:1 tranny). It still has similar issues that the 400 had getting on plane but is noticeably better than the 400 was in my other 2 boats. We are in the DFW area so obviously elevation is not an issue for us.

My 575 is unbelievable...never an issue getting on plane not matter how many people in the boat with 3500lbs of ballast and 850llbs of lead. I would love to go 575 again but with the 1.76 tranny and the ability to run a 16x17 prop I wouldn't pay the upcharge again. Even though the whine of that blower on the 575 is worth the price!!!

If you go Makai with the 5200lb dry weight, 4000lbs of ballast and from what I read there is a definite need for lead or additional ballast (lets say 800lbs of lead), along with 370lbs in fuel, then gear and people you are looking at roughly 11,000 pounds I would say the 450 is a must...I am sure there will be people that disagree.

When I was building my boat I heard all the same things about the 400 (it had the 1.5 Transmission at the time). I did stumble across one member on here (some people will know who I am talking about) that had a 2019 Makai with the 450 at the time that he had "slammed" for surfing. By "slammed" on a Makai I am talking about 1,700 lbs of lead and the Wakemakers 1345s in place of the factory 1k rear bags (4 adults). He told me that in his older SE he had the 440 (1.5 Transmission) and had it set up the same way and that it was maxed out surfing like that and would sometimes struggle holding speed in rougher water. He said on his Makai the 450 didn't mind the weight at all.

All that being said when I opted for the 450 (MY 2019) it was the only motor in SC's lineup with the 1.76 Transmission and I made that decision as much for the transmission gearing if not more than the extra power. Also the clearance to run a larger prop was another added bonus with the 1.76 transmission. I run 1K in lead and just upgraded to the Wakemaker's 1345s in the rear and this boat/motor doesn't bat an eye at the weight. I haven't ridden in any 2020s with the 400 so I can't speak as to how it compares to the 450 what I can say is that I have never regretted getting the bigger motor!

[2in2out]

I was talking to a dealer today and they verified that if you are 3000ft ASL that you'll want to go with the 450 or 575. Most of my boating occurs between 4500 and 6500 ASL, so I was already ruling out any 400 Makai or Supra, and preparing for the upgrade. I usually don't have large crew, but when I do, or when the Sierra zephyrs start, you need that power when plowing. They said the 450 should meet my needs, and that the 575 upgrade wouldn't be realized unless I had the boat filled with brew and crew.

When my wife makes me move to the lowlands below the snow line, I'll have all the power I need with the 450.

[Isaguel]

Great thread. Lots of great info on engine performance and effect of altitude on power. I'm glad I brought up the age old topic about altitude, turbos and SC's.

Now, question #2:

I have a lawnmower, a Toro, B&S engine, that just keeps sputtering, and .......