300R on a Checkmate?

[WavetoWave]

I would opt for the 300R for the money. A few extra ponies never hurts and I don't think there is a great price difference between the two motors.

Here's a few pictures that I found of my 2400!

I love how yours has the full dash, and not the walk through

[derpid]

On a 21? 250R would be perfect.

I think for cost efficiency a Nizpro tuned yammy 4.2 would be the ticket. the more I investigate it, the better it looks (at least on my end when you figure in CAD exchange and wait time)

[WavetoWave]

I think for cost efficiency a Nizpro tuned yammy 4.2 would be the ticket. the more I investigate it, the better it looks (at least on my end when you figure in CAD exchange and wait time)

Yamaha 4.2 + NizPro + lower unit + prop shaft upgrade + mounts = $$$$.

But I'd love to see it.

[derpid]

Yamaha 4.2 + NizPro + lower unit + prop shaft upgrade + mounts = $$$$.

But I'd love to see it.

why the lower and prop shaft upgrade? especially with tune alone? the SHO comes with a sort of sporty knock off and the life span of the lowers with the charger have been pretty impressive. you could do a 200SHO with the ecu reflash to 330 for significantly less than a 300r or even a 250r. you could definitely do a 200SHO with charger kit and be almost on par with new 300R cost and I trust Yamaha a lot more lol

[JUPITER PULSARE]

The factory has sold some 2400's with 400R's as well as the 300 PRO XS V8. I think mine will be the first factory rigged 2400 with a 300R and hope to take delivery of it next week. I ordered an Atlas hydraulic jack plate with 10" of set back to begin with. After I break it in it will be prop testing time.

Looking forward to seeing your new boat and hearing about your setup and numbers. The Verados have built in setback (about 4-5") in the clamp desing, so adding a lot of setback on the Verado powered Pulsare 2400 would create porpoise. I run an Atlas 8" setback Jackplate on my 2400/300 Verado Pro. I have a friend who was running a 12" jackplate plus a 1" thick transom plate on his 400R powered BRX and he had a lot of handling issues until we reduced the setback to 6".

[Pulsare2400]

Yes you are correct, the AMS is standard on the Verado (old and new V8's) and has about 4.5" of set back. Checkmate sets those up with about 6" of set back (so a total of about 10" - 11") and I drove a factory set up 400R in Bucyrus with Dean. Came on the plane easy and no porpoising (at least at the speeds we ran it). The factory uses 10" set back with a conventional mid section like my 300R. In 2015 (I believe but should ask Dean again) they moved the windshield forward (on the 2400) to move the CG forward and make it less likely to porpoise. Dean told me the previous BRX left the factory about 2 months ago and he had it up to 5800 rpm with a 25P Trophy and it was running 70 mph with a 300 PRO XS V8. The owner did not want him to open it up, but Dean said he thought he could have easily hit 6000 - 6100 rpm.

[Pulsare2400]

Hi again. During conversations with Dean in the last few months, he mentioned that there is a Mercury engineer that owns a 2400 Pulsare (forgot if it is a BRX or long deck like mine). He removed the engine he had and installed one of the new 450R engines. Dean said that is all he knows, nobody mentioned anything about the performance, so apparently there is a 2400 with a 450R on it as well!!!

[WavetoWave]

Hi again. During conversations with Dean in the last few months, he mentioned that there is a Mercury engineer that owns a 2400 Pulsare (forgot if it is a BRX or long deck like mine). He removed the engine he had and installed one of the new 450R engines. Dean said that is all he knows, nobody mentioned anything about the performance, so apparently there is a 2400 with a 450R on it as well!!!

Ya, I saw it in a Mercury social media post or ad. Would be interesting.

[WavetoWave]

why the lower and prop shaft upgrade? especially with tune alone? the SHO comes with a sort of sporty knock off and the life span of the lowers with the charger have been pretty impressive. you could do a 200SHO with the ecu reflash to 330 for significantly less than a 300r or even a 250r. you could definitely do a 200SHO with charger kit and be almost on par with new 300R cost and I trust Yamaha a lot more lol

Nizpro uses the shaft upgrade. It's a necessity.

[derpid]

Nizpro uses the shaft upgrade. It's a necessity.

wasnt always, but if they sell it now then why not. But for tune only, ill go till she blow.

[derpid]

i got curious WavetoWave and had to ask Nizpro about the lowers, heres what they said:

The lower units are still proving to be very reliable, on customer boats that are fitted with superchargers that can weight up 29,000lbs in quad engine set ups down to high speed bass boats we have seen one failure. That was on a flat bottom 22 footer with a hydraulic jack plate using a offshore series engine, The customer simply ran the engine to high and cooked the lower unit until the prop shaft seal fell out draining the oil and the gearbox failed. I don’t believe blaming the supercharger for this failure is appropriate. Many of the other boats have now done 600 hours plus on standard lower units.

I would have thought more failures would of occurred by now but that's what they state.

[AZMIDLYF]

They have done their R&D on the lower units, that's for sure.

[Greg G]

On a 21? 250R would be perfect.

I might be missing some relevant information. What are the differences in your opinion between a 250R and a 300R?

[WavetoWave]

i got curious WavetoWave and had to ask Nizpro about the lowers, heres what they said:

The lower units are still proving to be very reliable, on customer boats that are fitted with superchargers that can weight up 29,000lbs in quad engine set ups down to high speed bass boats we have seen one failure. That was on a flat bottom 22 footer with a hydraulic jack plate using a offshore series engine, The customer simply ran the engine to high and cooked the lower unit until the prop shaft seal fell out draining the oil and the gearbox failed. I don’t believe blaming the supercharger for this failure is appropriate. Many of the other boats have now done 600 hours plus on standard lower units.

I would have thought more failures would of occurred by now but that's what they state.

On a quad engine setup with the gearcase submerged, not a big deal. Surfacing a single engine, running 95+, no way. Hydro-Tec has a fat shaft they offer, the SHO lower mod moves the water intake lower as well. Solid mounts, and the ECU flash make it a little bit involved. Surfacing the SHO, you will break that prop shaft. It's actually common to break or bend, that's why the fat shaft is so popular. The Yamaha only has 1.75 gears too, so the Merc has an advantage there with the new 1.60:1 Sport Master. Hydro Tec does make a 1.62 gear set for the fat shaft SHO as well.

HT fat shaft: https://www.hydrotecmarine.com/shop/...uty-propshaft/

Some guys used to convert to a sport master on the Yamaha, but that's a lot of work, and I don't think it worked well from what I understand.

I love the project though, not trying to be negative at all. I like those engines, really want to see it. It won't necessarily be cost effective though. A Yamaha with all the modifications adds about $4k in extras just to get it close to the Merc.

A certified pre owned 250 ProXS is $13k with warranty and will be very fast mid to high 80s?. A 250R is about $19k. 300R, about 25k?? maybe more.

I love a 21 Pulsare, I think you'll find that moving that needle past 97 is going to be tough, Wildman did it, with a perfectly setup rig. To get past that you'd need to make it lighter, blueprint the bottom, and add power. It's not super aerodynamic at those speeds. You definitely don't want to break a prop shaft at that speed in that boat.

4.2 SHO gearcase. It's not a sport master!

[WavetoWave]

They have done their R&D on the lower units, that's for sure.

Yes! Those aren't stock, that's for sure.