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Jan 23rd, 2013
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Performance chip - ECU flash for Yamaha V MAX SHO VF25O #12328089 07/07/17 03:26 PM
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JC Skeeter Offline OP
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I have typically purchased an aftermarket chip/programmer for my trucks. Such as those that raise rev limiters, provide more torque/hp etc. Normally brands/items such as superchips or SCT Livewire. I have never had an issue with any of them on my trucks, always gained more performance without having any mechanical troubles.

My buddy and I each have skeeter bass boats, 21', with Yamaha V MAX SHO VF250's. His is a ZX model and mine is an FX.

We got to talking about performance and we were wondering if they make anything in the form of a chip/programmer for these outboards such as they do for automobiles?

If so, what are some of the best brands or places to buy from? Also, for those that have tried this type of deal out, what has been your experience, i.e.

- any noticeable gains on hole shot and top end speed?

- any mechanical issues that are for sure from the chip and not just from the user?

Moritz Chevrolet - 9101 Camp Bowie W Blvd, Fort Worth, TX - Monte Coon (817) 696-2003
Re: Performance chip - ECU flash for Yamaha V MAX SHO VF25O [Re: JC Skeeter] #12328158 07/07/17 04:07 PM
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Re: Performance chip - ECU flash for Yamaha V MAX SHO VF25O [Re: JC Skeeter] #12328165 07/07/17 04:13 PM
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Also you may want to check BBC Yamaha performance page.

Re: Performance chip - ECU flash for Yamaha V MAX SHO VF25O [Re: JC Skeeter] #12328185 07/07/17 04:25 PM
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If your going to do any performance mods on Yamaha motors Hydro-tec is the way to go. They have a ecu flash that will make 300 plus hp.

Re: Performance chip - ECU flash for Yamaha V MAX SHO VF25O [Re: JC Skeeter] #12328518 07/07/17 07:44 PM
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Good to know


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Re: Performance chip - ECU flash for Yamaha V MAX SHO VF25O [Re: JC Skeeter] #12328653 07/07/17 09:15 PM
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Thanks for the info guys. Anyone have info as to whether or not these things cause any damage to the engine? I do regular maintenance and everything and just wanted a few more mph with a little better hole shot.

Re: Performance chip - ECU flash for Yamaha V MAX SHO VF25O [Re: JC Skeeter] #12328687 07/07/17 09:38 PM
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I'd love to do this to my boat but wouldn't be able to use it in tournaments anymore.



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Re: Performance chip - ECU flash for Yamaha V MAX SHO VF25O [Re: JC Skeeter] #12328692 07/07/17 09:41 PM
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mudd Online Content
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Call hydro tec for a flash but to get true power from flash I think u have buy like small cheap part


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Re: Performance chip - ECU flash for Yamaha V MAX SHO VF25O [Re: JC Skeeter] #12328997 07/08/17 01:36 AM
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Originally Posted By: Fish'n Skeeter
I have typically purchased an aftermarket chip/programmer for my trucks. Such as those that raise rev limiters, provide more torque/hp etc. Normally brands/items such as superchips or SCT Livewire. I have never had an issue with any of them on my trucks, always gained more performance without having any mechanical troubles.

My buddy and I each have skeeter bass boats, 21', with Yamaha V MAX SHO VF250's. His is a ZX model and mine is an FX.

We got to talking about performance and we were wondering if they make anything in the form of a chip/programmer for these outboards such as they do for automobiles?

If so, what are some of the best brands or places to buy from? Also, for those that have tried this type of deal out, what has been your experience, i.e.

- any noticeable gains on hole shot and top end speed?

- any mechanical issues that are for sure from the chip and not just from the user?




Have you checked to see if it will affect your warrantee ?

Last edited by GIG'EM AGGIES; 07/08/17 01:37 AM.

I am a Senager. (Senior teenager) I have everything that I wanted as a teenager, only 50 years later. I get an allowance every month. I have PU truck and a bass boat, I am blessed.
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Re: Performance chip - ECU flash for Yamaha V MAX SHO VF25O [Re: mudd] #12329001 07/08/17 01:38 AM
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JC Skeeter Offline OP
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Originally Posted By: mudd
Call hydro tec for a flash but to get true power from flash I think u have buy like small cheap part


Is hydro tec better/more recommended than Simon?

Re: Performance chip - ECU flash for Yamaha V MAX SHO VF25O [Re: JC Skeeter] #12329013 07/08/17 01:43 AM
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Outboards typically use a different electronic format than autos (closed loop, rather than an open loop), so no viable chips or piggy back units are available. You ECM can be reprogrammed. Outboards are typically tuned on the safe side since the manufacturer has no idea how the motor will be used, but any reprogramming always carry's a risk.

Re: Performance chip - ECU flash for Yamaha V MAX SHO VF25O [Re: JC Skeeter] #12329028 07/08/17 01:56 AM
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Originally Posted By: Fish'n Skeeter
Originally Posted By: mudd
Call hydro tec for a flash but to get true power from flash I think u have buy like small cheap part


Is hydro tec better/more recommended than Simon?


Hydrotec is the Yamaha guru! I've hung out with him few times and he knows his stuff. I've never felt with Simon but all I hear and see is Hydrotec on 90 percent of Yamaha out there going back to 90s style motors


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Re: Performance chip - ECU flash for Yamaha V MAX SHO VF25O [Re: JC Skeeter] #12329046 07/08/17 02:04 AM
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BBC has the best info. Hydrotec is said to be the best. So far, the only way a yamaha tech can tell if you have a flash is if you raise the limiter. They can see you went over stock rooms without throwing a code. Personally, I won't chance it, plus I think my boat is fast enough. But, there have been some skeeters that gained some decent speed out of it. One issue is the rpm and torque band has a flat spot built in that starts at 5k and is almost flat till 6k. Some guys were having a hard time getting past that spot to reach the extra power you get by raising the limiter. All the info is on BBC.

Re: Performance chip - ECU flash for Yamaha V MAX SHO VF25O [Re: JC Skeeter] #12329082 07/08/17 02:28 AM
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From what I can tell you really do not gain anything until you start getting higher rpms on a 250. This is a lot easier to achieve on go fast boats.

I did have a older skeeter pass me and leave me last year on Dardanelle. I was running 76-78. Hahahah

When I asked the Yamaha service rep about being able to see it. He just smiled. I'm sure they have a way of telling if anything catastrophic happened. I wouldn't feel that comfortable over 6500rpm for extended time.

Re: Performance chip - ECU flash for Yamaha V MAX SHO VF25O [Re: mudd] #12329096 07/08/17 02:39 AM
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JC Skeeter Offline OP
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Originally Posted By: mudd
Originally Posted By: Fish'n Skeeter
Originally Posted By: mudd
Call hydro tec for a flash but to get true power from flash I think u have buy like small cheap part


Is hydro tec better/more recommended than Simon?


Hydrotec is the Yamaha guru! I've hung out with him few times and he knows his stuff. I've never felt with Simon but all I hear and see is Hydrotec on 90 percent of Yamaha out there going back to 90s style motors


Very good to know, thanks. I'll call hydro tec Monday.

As far as warranty, if it's anything like my truck was you just return it to stock before sending it to the dealer.

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