Upgrade Evinrude 200 to 225

[valdr]

Does anybody know if an evinrude 200 be easily upgraded to 225 hp. Both models have the same block. The additional horses must come out of the the mixture/carb.<br /><br />Have a '93 Evinrude 200 TX (Q02614230).

 

[Dhadley]

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.

 

[valdr]

Re: Upgrade Evinrude 200 to 225

I am at about 5400 rpm now (my spare is smaller and rev's out to over 6000 rpm).<br /><br />I am just curious what's the difference between a 200 and 225. Both seem to have the same block and dimensions.

 

[Dhadley]

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.<br /><br />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.<br /><br />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. <br /><br />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.<br /><br />Lets get the model number of the motor too.

 

[charlie_kula]

Re: Upgrade Evinrude 200 to 225

Most probably its the jetting, that the 225 gets more fuel which allows it to rev higher where higher horse comes out.<br /><br />I have got the 300 xp and have done some investigation. The only thing that differs between the 275 and the 300 is the jetting. More fuel at peak rpm gives more power. The 275hp has a recommended rpm range 4500-5500. The 300hp range 5000-6000 rpm.<br /><br />One thing to remember is that more fuel equals higher fuel consumption and more smoke! I would actually like to go down to the 275 to get better milage and less smoke.<br /><br />Dhadley is great and has answered a lots of question for me, but I think he is some kind of elevation fanatic. Rise the engine til it screams! (and breaks?)

 

[seahorse5]

Re: Upgrade Evinrude 200 to 225

I am shooting from memory here since I don't have a book handy, but in those years the main differences between the 2 engines were the carb venturi size(and related jetting) and the reed boxes.

 

[R.Johnson]

Re: Upgrade Evinrude 200 to 225

Zephyr: I would have to say that the Dhadley theory is, high RPM, light loads, long life. Most books on mechanic's seem to agree with him. Where did you see, or smell smoke at 6000 RPM?

 

[walleyehed]

Re: Upgrade Evinrude 200 to 225

To add to R.Johnson's post in that dropping to the 275 would require more power to turn the same prop and milage will go down....so we think drop a step in pitch, well....now we're slower and milage suffers another shot.<br />Jetting is a RESULT of the actual differences in the 2 engines. Venturi size and reed box design changes require a jetting change, as well as the actual porting itself.<br />If you misunderstand the reason for getting the engine heigth up, count on extra drag, lower speeds and of course lower RPM.<br /><br />

Dhadley is great and has answered a lots of question for me, but I think he is some kind of elevation fanatic. Rise the engine til it screams! (and breaks?)

As many Awards, Trophys, banners, boats and engines he has won racing these, not to mention the money...and of course the many manufacturers, and performance shops that want him for a spokesman, tells me he's been there, done-it, seen-it, got the T-shirt, and ya "might" want to pay attention to what his advice is because IT WORKS very, very well.

 

[charlie_kula]

Re: Upgrade Evinrude 200 to 225

Of course it is good for racing to rise engine! But for family use it may be a bit agressive doing high ventilation hole shots and trimming on the edge of ventilaton. The least you turn the boat the engine start screaming.<br /><br />I do understand and apriciate that Dhadley and many other here have lots of skills!<br /><br />The 275 and 300 have the same reeds and porting.<br /><br />The smoke don't come out at max rpm, but at startup and low to mid rpm, where the 2-cycle engine is not as effecient as the 4-stroke.

 

[valdr]

Re: Upgrade Evinrude 200 to 225

Dhadley, Thanks for the advice. The engine is a 200 TX (Q02614230) from 1993. When I play with the trim and the chop is down I can get the engine up to maybe 5500 or even 5600. <br /><br />The boat is a 22" Grady White (V2 hull), the prop a three blade (Ithink) 19*17. When the hub blew a got a used 19*15. With this prop the engine would rev up to 5700 / 5800, and I stopped there as I didn't want to hurt the engine.<br /><br />Could I just replace the jettings and get more horses out there? I maybe able to do that myself if its that easy, but where would I get the parts?<br /><br />Thanks a lot for all the good advice!<br />Walt

 

[seahorse5]

Re: Upgrade Evinrude 200 to 225

Your engine NEEDS the 15" inch prop to keep the rpm's within the 5500-6000 rpm factory recommended limit. You will also find the boat more responsive off shore, expecially in a following sea.

 

[G DANE]

Re: Upgrade Evinrude 200 to 225

To Zephyr and others that wonder why it is so important to find the maximum performance setup, when you are not that WOT speed focused. <br /><br />When you find the setup that gives boat/motor comp the highest possible WOT speed, perhaps 15 - 20% higher than your prevoius top speed, you can back off throttle and go your old top speed at 20 % better mileage and 20 % less wear on your motor. Same perceantage will follow all the way down the RPM range. Less fuel consumption = less smoke too. Thats what DHadley is trying to explain us all. Imagine you had a car with manual transmission. If you choose too high a gear, going slower wount help your motor run better !!<br /><br />I dont think DHadley is any kind of elevation freak, he just had the experience that most motors are mounted too low on transom, and knows the value of the right setup.

 

[charlie_kula]

Re: Upgrade Evinrude 200 to 225

A quick check shows that the block are the same, however the carbs differ. The 185 and 200 have one type of carb and the 225 another. It seeams bigger.<br /><br />E200TXATF 1993<br />Part No Descr<br />436124 THROTTLE BODY, Upper<br />436125 THROTTLE BODY, Lower<br />318832 ORIFICE, Idle air bleed, port, #35<br />325829 ORIFICE, #42<br />331433 ORIFICE, High speed, #62D<br />436272 CARB. BODY<br /><br />E225TXATF 1993<br />Part No Descr<br />436139 THROTTLE BODY, Upper<br />436140 THROTTLE BODY, Lower<br />317473 ORIFICE, Idle air bleed., #30<br />328526 ORIFICE, #66<br />328545 ORIFICE, High speed, #64D<br />436014 CARB. BODY<br /><br />Apart from that, it is the same manifold, cylinder head and exhaust. The cover differs though