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02-14-2018, 08:59 AM #166000 RPM
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Just be mindful of the warranty when reflashing.
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02-14-2018, 09:13 AM #17Member
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Gotta pay to play!! :-)
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02-14-2018, 07:29 PM #186000 RPM
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Basically with the 400 you get 50 extra horsepower, I believe from the calibration, and the sportmaster lower unit with a reeeeaaally low water pickup. You can flash the 350 for extra power but the lower unit becomes a problem over 80, and with the flash you lose the warranty. I'm not convinced the simon and whipple flashes really get you 450 hp because both engines use knock sensors to maximize ignition advance. If they get you anything it might be only in just the right conditions but you just sacrificed your warranty on a $20-30k motor. I went through the exact same decision struggle and elected to get the 400r for the warranty, lower unit, and of course power (not having to modify it).
Last edited by engineermike; 02-14-2018 at 07:31 PM.
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Rynobull liked this post
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02-17-2018, 06:54 AM #19USA
1979 Hydrostream Viking with Merc 150, sold in 84’
2014 CheckMate 24' BRX with Merc 400R
2017 TUFF 28 with twin Merc 300XS's
🇺🇸 & 🇻🇪
Venezuela
Santos 18’ with 200 Black Max
DaSilva 21’ (Shadow) with Evinrude 300 V8
Whitby 42’ ketch S/V
🇺🇸 & 🇻🇪
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Rynobull liked this post
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02-17-2018, 07:02 AM #20Member
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Never really looked at that way. With the rep whipple has I just took it for fact! I'm gonna dig around and see if I can find any more info.
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02-18-2018, 07:40 PM #21Junior Member
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Hypertoon
I have a 24 foot hypertoon with a 250 HO e-tec that runs 70.2 mph, I want to upgrade greatly on the engines, can someone help me with the performance difference between a 400 hr and a turbo-charged Yamaha? I know both motors weigh more than a 505 e-tec but the extra weight wont hurt this pontoon at all, in fact it might help it.
Contact Info: Ronald Alstott. Corydon Indiana. 812-968-4290
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02-18-2018, 07:48 PM #226000 RPM
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Isn't the Yamaha a supercharger kit? I don't doubt that the Yamaha can make as much power as the 400r, but for how long and how much tinkering will it take? The 400r is a production engine, designed to handle 400 hp for thousands of hours, and warrantied. The Yamaha is less likely to work perfect from the start and less likely to have the long term reliability. Then, there's the question of the lower unit. There is no fat shaft or hd lower unit available on the Yamaha. I've heard of people adapting sportmasters to them, but the non-hd sportmaster will have a shorter than optimal lifespan behind 400+ hp. The 400r comes with a larger diameter housing than the older sportmaster so they can fit bigger stronger gears. It has the fat output shaft as well.
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02-19-2018, 03:26 AM #23
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02-19-2018, 05:51 AM #24
The 60+yo wife of the Playcraft owner setting the single outboard LOTO Shootout record of 78mph for a pontoon. Stepped hull, extended rear center tube ,full interior.
https://www.facebook.com/speedboatma...9348931060649/Last edited by fasttoons; 02-19-2018 at 05:55 AM.
Performance Pontoon & Deckboats LLC
Tritoon Performance Specialists
Volusia, Florida
Phone 386-490-3666
fasttoons@gmail.com
www.fasttoons.com
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JPEROG thanked for this postCapt.Insane-o liked this post
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02-19-2018, 07:06 AM #25
That's the one ^ the triple 300x is the same brand?
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02-19-2018, 03:00 PM #26
No
Performance Pontoon & Deckboats LLC
Tritoon Performance Specialists
Volusia, Florida
Phone 386-490-3666
fasttoons@gmail.com
www.fasttoons.com
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Capt.Insane-o liked this post
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02-19-2018, 03:06 PM #27
Old photos from three years ago. Check out how extended the rear center pontoon is. Stepped outside pontoons. This is not the same boat. This is a Playcraft Poker Run 25'.
Last edited by fasttoons; 02-19-2018 at 03:09 PM.
Performance Pontoon & Deckboats LLC
Tritoon Performance Specialists
Volusia, Florida
Phone 386-490-3666
fasttoons@gmail.com
www.fasttoons.com
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02-23-2018, 10:09 PM #28Junior Member
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I have 24 foot hypertoon pontoon with a 250- HO- etec that runs 70.2 mph, if I upgrade to a 400R mercury can somebody estimate what the speed increase might be? Including the ideal proper setup.
Ronnie Alstott,
812-968-4290
Corydon, Indiana
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02-23-2018, 10:45 PM #296000 RPM
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87.......according to http://www.go-fast.com/boat_speed_predictions.htm
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02-24-2018, 07:18 AM #30
Performance Pontoon & Deckboats LLC
Tritoon Performance Specialists
Volusia, Florida
Phone 386-490-3666
fasttoons@gmail.com
www.fasttoons.com
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