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97 200 Venom Carburetor upgrade

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Paul97

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Hey guys, I have a 1997 200 venom. I have been told that all I have to do to upgrade to a 225 is get a set of 225 carbs and install them. I have a few questions; is this true? and, do I have to change out the throttle plates as well or is it just the carbs? and, are their any negatives to doing the upgrade?
 
Paul97 said:
1997 200 venom. I have been told that all I have to do to upgrade to a 225 is get a set of 225 carbs....
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I found this info from another forum back in 2004

"Re: Upgrade Evinrude 200 to 225

Its very easily done. Unless youre over 6200 rpm now, youll never see the difference and wonder why you spent the money."

The OP in that thread said he was currently running at 5400RPM @ WOT

"Re: Upgrade Evinrude 200 to 225

At 5400 rpm all youll see is a slower plane time. You may see a very very slight rpm gain but the extra fuel burned wont make it worth while.
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Its always better to maxamize your set up first and then upgrade. At 5400 youre not taking advantage of whats available now. Tell us more about your set up and hull. What prop and accurate speed? We'll start by calculating slip%. Lets establish a baseline and go from there. Any setback or jackplate? Dont forget to note water pressure.
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Something to keep in mind -- the 200 and 225 have the same bore, stroke, same port timing, heads and gear ratio. The difference is very subtle between the two. To take advantage of that small difference your hull MUST react to small changesin torque. A hull with a pad and step or tunnel will react more positively than a conventional V bottom.
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Without knowing what hull, prop and set up you have its almost impossible to say what can be gained but at 5400 I'll bet theres something there. Besides, 5400 is lugging that motor and its possible for real bad things to happen because of that.
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Lets get the model number of the motor too."

It sounds like the 225HP carbs deliver more fuel and allow the engine to run higher RPM. So, unless you're running in that 6,000+ RPM range it doesn't sound like you'll see any benefit.

KJ
 
Yea, I saw that. It doesn't answer the basic questions that I asked. He is also talking from the third party perspective on what he has heard or thinks. I am hoping to hear from someone who has actually done this, and what his perspective is.
 
Thanks faztbullet! That's the info I needed. I think I have finally whipped my set up issues, now its time to do something else tinkering! :) Now to find the parts! Maybe I'll get lucky and find some HO carbs and plates! :)
 
Yes I have done it many times as has Fazt. Common error is to only change the plastic carbs, and not the throttle bodies.
If you look at Evinrude parts pages, the carb ASSEMBLY is sold as a complete unit, with the throttle body attached also.

The throttle bodies are an integral part of the complete carb ASSEMBLY and MUST follow the plastic carb bodies.

Differences are in the jetting, and the size of the throttle bore.

You will not gain that much performance, unfortunately. Not for the money anyway, and not for the added fuel expense.
 
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200 horse carb and throttle plate assemblies have two screws holding the butterfly to the throttle shaft.
225-250 horse carb and throttle plate assemblies have three screws.

Try to get 1996 and above used parts, as the bugs were finally worked out of the carb system from earlier years.

I will not install older than 1996 carbs.....too much BS trying to get them right.
 
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