2020 Z521L with Mercury ProXS 300 Performance Question

[Starkfishes]

I am going Ranger in 2020 and just noticed that the 2020 Z521L has been rated for a 300HP. I have never run a 300 and was wondering if someone here has and can comment on the performance difference versus a 250 Pro XS.

[howieranger]

With the 300 just now being installed on Z521L you might have to wait for some real world numbers. Or your dealer may have driven one at the dealer meeting and can give some feed back. It should be a rocket out of the hole and I would WAG a top end 73-74 loaded. My wife would not be happy if I traded now but it sure is tempting.

[Ranger519VS]

A 300 would make the Z521 finally a solid 70 mph+ boat. I don't think the difference from a 250 will be dramatic however. Just a good 2-3 mph increase in top end and a little better hole shot. At those kind of speeds the drag (both water and air resistance) increase exponentially.

[TopgunZ521C]

My Z521C already has hit 73.4 on its best day with a 250 pro XS and a 4 blade fury with an atlas JP 1/2 tank of gas I posted the snapshot here on BBC of the HDS 12 GPS SOG regular speed is 68 to 70 WOT fast enough for me its a big boat and not known to be fast with a 250 but every hull runs different with a different driver.

[Ranger519VS]

Yes Topgun, I have an older Z521 (2011) and 68-70 @5840 rpm is what I get with a 24" Fury 4. It wasn't much better with the 25 T1 that I ran previously. I have a SHO. Best speed I have ever seen with the boat is 72.5 mph @6100 rpm. That was in October with 45F air temperature and a slight tailwind and almost no gas in the tank.
The 25 T1 would run 6000 rpm and about 70-71 with a light load.

I have seen several stating they get 70+ @6000 rpm on the 521 with a 25" Fury 4. Mine just wouldn't pull that prop more than 5600-5700 rpm

[RangerBasser]

Take it from me...the 300xs makes a big difference.

[Jackson Gore Ar.]

I ran in the boat with a 300 at the dealer meeting. It ran 68 with about 250 pounds of people. It was slow, but i assume it just want set up right. It was also SLOW getting out of the hole, (Trim all the way down).

[CaymasRodney]

I ran in the boat with a 300 at the dealer meeting. It ran 68 with about 250 pounds of people. It was slow, but i assume it just want set up right. It was also SLOW getting out of the hole, (Trim all the way down).

I can back that up on the speed anyway, 68 mph with one at 250 and another at 120 at most.

[Starkfishes]

I ran in the boat with a 300 at the dealer meeting. It ran 68 with about 250 pounds of people. It was slow, but i assume it just want set up right. It was also SLOW getting out of the hole, (Trim all the way down).

Uh oh!

[Starkfishes]

Does anyone have any idea about when we can start getting some real use data on this configuration with the boat set up right? I hate to be the guinea pig but I may just do it. Someone’s gotta do it.

[Jackson Gore Ar.]

Go for it!

Does anyone have any idea about when we can start getting some real use data on this configuration with the boat set up right? I hate to be the guinea pig but I may just do it. Someone’s gotta do it.

[Whiteboat]

I ran in the boat with a 300 at the dealer meeting. It ran 68 with about 250 pounds of people. It was slow, but i assume it just want set up right. It was also SLOW getting out of the hole, (Trim all the way down).

I am sure they toned down the setup at dealer meeting for safety purposes.

[Tico]

I am sure they toned down the setup at dealer meeting for safety purposes.

no way...

[Starkfishes]

I couldn't stand it - I've got one on the way. I'll be sure to post as much as I can regarding prop testing and final performance metrics. Just 8 weeks and counting!

[crank68]

From a 250 to a 300 you’ll prolly see a 5-7 mph gain on a heavier hull boat.

[grhodes674]

I have a 2021 z521 L w300. It comes standard with a Fury 23p prop and I have the TH Marine hydraulic jackplate. With 2 guys, full tank and loaded gear the hole shot is 2-3 seconds so I am happy there. The top speed for me so far with this load is 68 at 6150 RPM. I am trimmed almost to the max and the Jackplate is set around 12 which if my measurements where right had the center of the prop about 3.25” below the bottom of the hull. I’m hoping to try a Fury 24P this weekend for comparison.

[electritek]

I have a 2021 z521 L w300. It comes standard with a Fury 23p prop and I have the TH Marine hydraulic jackplate. With 2 guys, full tank and loaded gear the hole shot is 2-3 seconds so I am happy there. The top speed for me so far with this load is 68 at 6150 RPM. I am trimmed almost to the max and the Jackplate is set around 12 which if my measurements where right had the center of the prop about 3.25” below the bottom of the hull. I’m hoping to try a Fury 24P this weekend for comparison.

You're getting too much prop slip. Drop the plate and trim up to around nine and let er eat. That rig should run 72-73 loaded.

[TopgunZ521C]

Take it from me...the 300xs makes a big difference.

especially in the fuel costs lol

[TownesZ21]

I ran in the boat with a 300 at the dealer meeting. It ran 68 with about 250 pounds of people. It was slow, but i assume it just want set up right. It was also SLOW getting out of the hole, (Trim all the way down).

Crazy they wouldn't know how to set it up for a dealer meeting, it's their darn boat!

(and I'm a Ranger guy)

[dean c]

Why mess around? I think I’d go Jaguar/450R if I wanted a big boat that’s fast.