200 pro xs 5400 rpms

[Benz819]

200 pro xs 4 stroke
serial # 2b742555
819 Phoenix
3 p2p
23 pitch fury 3 blade prop
I am only seeing 5400 rpms at wot and dealer says
throttle is getting 100%. Talked to a prop guy and he said something doesn’t sound right
with those numbers I’m seeing should be able to get a minimum of 6000 rpms. He said I should contact
mercury or see if another dealer can verify I’m getting 100% throttle, because he doesn’t think I’m getting wot. In the mean time I called mercury and they said I’m over propped and should try a lower pitch prop, funny thing is I’m running the lowest pitch fury they make so she said might have to try a different brand prop, from what I have heard other people are running on this exact boat, I’m not buying what mercury said. Any body have any ideas what they would do?

[thommo59]

Have a look at my post below “what’s holding it back”

[Benz819]

I went through the Whats holding me back post and what I got out of that is I need to find a dealer
that does prop demo and run a 22 and 23 tempest and a 24 bravo 1 fs?

[12many]

assuming tach is smartcraft or vesselview

1)200 needs to spin. gotta remember its a 300 detuned. so hp doesn't keep climbing over 4500 rpm. pretty much flat so prop it for 6k+.
2) dunno why but new motor runs way higher than old opti.
im at about 2.5 ptp on a nitro.

so lift it .. then try a tempest to get lower pitch and lift it more

[EuropeanAM]

Agree it will need to be higher than previous engines, and probably something in the range of a 21-22P Tempest Plus.

IMPORTANT: Before you make ANY changes, make certain that you are using a SMARTCRAFT display for your RPM's. DO NOT rely on figures from any Analog Gauge.

[Benz819]

Thanks Don, I have the mercury VesselView on my phone and it seems to be in check with my analog gauge for rpms.

[1Holeshot]

I went through the Whats holding me back post and what I got out of that is I need to find a dealer
that does prop demo and run a 22 and 23 tempest and a 24 bravo 1 fs?

That about sums up the results.

[thommo59]

Interesting, mine feels “flat” from about 4800 up. But I can’t get props to test either. Would love to know how it’s detuned, which parts are different. Hope this isn’t hijacking, the op and I have similar stories

[EuropeanAM]

The "detuned" comment is a bit misleading. There are differences in the air and fuel systems, as well as the electronic engine controls/calibrations.

[thommo59]

Thank you

[12many]

the 200s ridiculous low end and mid range make propping difficult as its sorta falls on its face i chose less prop bow lift with a bravo running very high. and used more offset and more stern weight to get nose up .and get decent numbers.

fun fact i lost 1 mph when talon went in for warranty and 1 mph when tank under half. due too loss of bow lift. have a 24 bravo on 4.8inch 1.85 ratio lower unit. prob close to 2inch ptp most days. 5 batteries talon 2 livewells and a full windshield 63-64 mph just over 6krpm

[mbeachy]

I had a 200 pro XS 4s and ran a 22 tempest plus and was able to get it dialed in. on a 19 ranger 518l

[Bkp2609]

The mercs are “detuned” in the lower hp ranges. From 200-300 the same 4.6l is used. The 200/225 has different throttle bodies than the 250/300. Less air and fuel = less horsepower. The 200 uses the same throttle body as a 225 but the ecu mapping is different to make more power. So the motors are detuned to a point

[Jim54]

I hope you get it figured out because I am having the same problems with my new 200 pro xs and I know every case is different , but it seems to be more issues with the 200's than any of the others and I strongly think there is something going on with that motor ,and before anyone says your'e over propped I have spent a several dollars and time swapping out props . I have put 3 different props on and went down in pitch every time ,and raised the engine as much as 1.5" and with all these changes I still cannot get it to turn more than 5860 rpm and that was the same with each of the props I tried , its in the shop right now and I watched it on the dyno with the same results 5860 . Throttle is 100%, compression is good only 6 hours on the engine . I have a lot of faith in these guys working on it and the marine dealership as well and if I didn't I wouldn't be driving 2.5 mile miles one way and have been for 30 years .I believe they will figure it out and when they do I will share it .

[thommo59]

Looking forward to hearing the outcome, please keep us posted

[thommo59]

Don, what’s the chance of a bunch of these either being 1 tooth out in the cam timing or some poor ecm maps? It almost feels like you get a top end motor or you don’t. From race bike engines I’ve seen in the past will run great 1 tooth out but just fall flat up top.

[EuropeanAM]

Don, what’s the chance of a bunch of these either being 1 tooth out in the cam timing or some poor ecm maps? It almost feels like you get a top end motor or you don’t. From race bike engines I’ve seen in the past will run great 1 tooth out but just fall flat up top.

Not completely impossible, but quite unlikely based on the numerous possible problems it would trigger/cause.

Thread cleaned to remove 2-stroke engine setups that do not pertain to the Original Poster's situation.

Folks: Please remember that there should be ONE (1) engine per post. While many of you are attempting to assist with information from your own rig/experience, the addition of multiple engines, boats, setups, and stories simply confuses the process.

Thank you for your understanding.

[Bass Broke]

Any answer