texasfishingforum.com logo
Main Menu
Advertisement
Affiliates
Advertisement
Newest Members
Delta6, rustybird, tejx5, James D Michel, lothar
109300 Registered Users
Top Posters(All Time)
TexDawg 90,132
hopalong 78,912
Pilothawk 77,553
John175® 69,868
JDavis7873® 67,393
Derek 🐝 61,694
Tritonman 58,401
Mark Perry 54,846
LoneStarSon® 54,824
facebook
Forum Statistics
Forums60
Topics777,515
Posts13,005,250
Members109,300
Most Online36,273
Jan 23rd, 2013
Print Thread
Mercury 250 Pro XS V8 4stroke #12790974
06/13/18 10:11 PM
06/13/18 10:11 PM
Joined: Oct 2016
Posts: 122
N. Texas
M
Mark Mayben Offline OP
Outdoorsman
Mark Mayben  Offline OP
Outdoorsman
M

Joined: Oct 2016
Posts: 122
N. Texas
I had a new motor delivered today (Mercury 250 Pro XS V8 4stroke).

I am running a 2015 NiTRO Z8 with a 2015 250 OPTI Pro XS currently with a Fury 25 prop. Will my new prop transfer over with the same performance, or will I need to
re-prop the Mercury 250 Pro XS V8 4stroke?


Last edited by mrm4545; 06/13/18 10:33 PM.
Re: Mercury 250 Pro XS V8 4stroke [Re: Mark Mayben] #12791324
06/14/18 03:21 AM
06/14/18 03:21 AM
Joined: Dec 2008
Posts: 7,337
Boerne, Texas
G
grout-scout Offline
TFF Celebrity
grout-scout  Offline
TFF Celebrity
G

Joined: Dec 2008
Posts: 7,337
Boerne, Texas
The v8 runs at a higher rpm, so most likely you will have to drop 1 or 2 inches in pitch. I’d run what you have first and once it’s broken in, you will know better what pitch to drop too.

Re: Mercury 250 Pro XS V8 4stroke [Re: Mark Mayben] #12791421
06/14/18 05:51 AM
06/14/18 05:51 AM
Joined: Apr 2017
Posts: 1,260
San Angelo
tmd11111 Online content
Extreme Angler
tmd11111  Online Content
Extreme Angler

Joined: Apr 2017
Posts: 1,260
San Angelo
They both have 1.75:1 gear rations and only a 200 rpm difference on top end so you should be ok.

Re: Mercury 250 Pro XS V8 4stroke [Re: Mark Mayben] #12792533
06/15/18 03:00 AM
06/15/18 03:00 AM
Joined: Jun 2004
Posts: 1,478
Benbrook Tex
O
OPTI Offline
Extreme Angler
OPTI  Offline
Extreme Angler
O

Joined: Jun 2004
Posts: 1,478
Benbrook Tex
Rpm range on that motor 5600 -6200 just have to make sure DemandLinear witch is requested handle position this should be at 100 % at WOT. then DemandLinear with Guardian -this tells you that that engine is not in Guardian should be 100 % at WOT then one other is Demand - this is the final demand value requested by the software. If the boat is propped correctly this should be at 100 % with the engine speed at 100 % I haven't got to run one yet but the days of just throwing a prop on one is gone. To check all of these readings engine has to be connected to diagnostic software G3 Have the dealer that is installing the engine take the boat to the lake and make sure all of these setting are correct. Your prop would be a best prop to start with.......OPTI

Last edited by OPTI; 06/15/18 03:03 AM.
Re: Mercury 250 Pro XS V8 4stroke [Re: Mark Mayben] #12793267
06/15/18 06:48 PM
06/15/18 06:48 PM
Joined: Oct 2016
Posts: 122
N. Texas
M
Mark Mayben Offline OP
Outdoorsman
Mark Mayben  Offline OP
Outdoorsman
M

Joined: Oct 2016
Posts: 122
N. Texas
I appreciate the insight from everyone - install tomorrow morning

Re: Mercury 250 Pro XS V8 4stroke [Re: Mark Mayben] #12795544
06/18/18 12:33 AM
06/18/18 12:33 AM
Joined: May 2011
Posts: 231
T
Tex5000 Offline
Outdoorsman
Tex5000  Offline
Outdoorsman
T

Joined: May 2011
Posts: 231
I saw some videos where the 250 Pro XS came with a 23 Fury that seemed a little too low in pitch. So a 25 Fury might be perfect. Here is the video.


Last edited by Tex5000; 06/18/18 12:37 AM.
Re: Mercury 250 Pro XS V8 4stroke [Re: Mark Mayben] #12796095
06/18/18 03:50 PM
06/18/18 03:50 PM
Joined: Oct 2016
Posts: 122
N. Texas
M
Mark Mayben Offline OP
Outdoorsman
Mark Mayben  Offline OP
Outdoorsman
M

Joined: Oct 2016
Posts: 122
N. Texas
Install hit a small snag (don't they always). The new Pro XS has the electrical harness connection moved from the front to the back of the motor, therefore an extension harness is required (and not sent with the new motor). Ordered today.

Re: Mercury 250 Pro XS V8 4stroke [Re: Mark Mayben] #12796943
06/19/18 12:55 AM
06/19/18 12:55 AM
Joined: Dec 2008
Posts: 7,337
Boerne, Texas
G
grout-scout Offline
TFF Celebrity
grout-scout  Offline
TFF Celebrity
G

Joined: Dec 2008
Posts: 7,337
Boerne, Texas
Originally Posted By: mrm4545
Install hit a small snag (don't they always). The new Pro XS has the electrical harness connection moved from the front to the back of the motor, therefore an extension harness is required (and not sent with the new motor). Ordered today.


Odd, it’s been stated on bbc that the clean power harness is included. Sounds like merc made way too many options this time.

Re: Mercury 250 Pro XS V8 4stroke [Re: Mark Mayben] #12799266
06/20/18 04:36 PM
06/20/18 04:36 PM
Joined: Oct 2016
Posts: 122
N. Texas
M
Mark Mayben Offline OP
Outdoorsman
Mark Mayben  Offline OP
Outdoorsman
M

Joined: Oct 2016
Posts: 122
N. Texas
Extension harness received and install resumed - hope to be on the water this afternoon

Re: Mercury 250 Pro XS V8 4stroke [Re: Mark Mayben] #12803125
06/23/18 10:54 PM
06/23/18 10:54 PM
Joined: May 2011
Posts: 231
T
Tex5000 Offline
Outdoorsman
Tex5000  Offline
Outdoorsman
T

Joined: May 2011
Posts: 231
Please let us how it did when you get a chance.

Previous Thread
Index
Next Thread


© 1998-2018 OUTDOOR SITES NETWORK all rights reserved USA and Worldwide
UBB.threads™ 7.6.2