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10-08-2011, 12:15 PM #31
Hey Dentguy what hull are you running, a Ally,Bullet or Stroker?
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10-08-2011, 02:47 PM #32Member
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Stroker
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02-07-2013, 04:39 AM #33New Member
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Hi guys - need help and advice - Live in South Africa and have limited access to all the fancy stuff - My Ranger Z520 has a Yammaha vmax 250 sho on and have a very poor hole shot - I have seen that FOXLAKE-H.O.Wolverine & DarthVMAX and other are saying that perhaps the ECU or EMM modded can make the 250 SHO into a 300 SHO. I have a standard unit not a salt water unit.How do I get into contact with Wayne Worthy. I need to get more HP out of my SHO - how ?
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02-08-2013, 10:50 AM #34
Wayne Worthy you will find at Hydrotec. Their is a link to the website on my links page (see below).
However, I doubt that a 300 ECU will solve your problem unless your current 250 ECU is bad.
The SHO should have very strong bottom-end, so I would suggest looking at your propeller and other aspects of set-up.Markus' Performance Boating Links:
www.toastedmarshmallow.com/performance
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08-12-2015, 10:07 AM #35Junior Member
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Internal parts comparison;
Has anyone studied part numbers to determine that the 4.2L 200/225/250 all use the same Cam's, Pistons, heads, intakes etc which would substantiate that 'chip' tuning really is as effective as it is said to be.
I am SERIOUSLY looking to buy a 200 (or225/250), but want to be certain that I could count on the upgrade being effective.
PR
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08-13-2015, 04:38 PM #365000 RPM
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all internals are the same, hp comes from throttle body opening and injector controls in the ecu.
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08-20-2015, 03:23 AM #375000 RPM
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HI Bassboys
Your 5500ft altitude is your biggest issue.
How does your boat run when get down to Inanda?
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09-22-2015, 08:52 PM #38
Have 250 sho love it great gas milage and hole shot better top end than 250 vmax
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09-23-2015, 10:27 AM #395000 RPM
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WE WILL BE AT THE PARKER ENDURO AGAIN THIS DEFENDING OUR TITLE!
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chopper26, Instigator liked this post
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02-06-2018, 01:00 PM #40Member
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The 200hp SHO is $2400 less than the 250hp. I went through all the parts numbers and everything is the same except the ECM. Looks like I will be buying the 200hp and save 2k.
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Instigator liked this post