1981 Evinrude 150hp to 200hp?

[irdir]

Is the carbs the only difference between a 150hp and a 200hp? I have the 150 and according to previous posts, it seems like all I have to do is change the carbs to ones from a 200 and have a 200hp. Is this true? My boat will hold up to a 175 and i'm looking for that extra push. I know that the 200 is rated at the engine and not at the prop so a 200 is really something like a 175. Thanks.

 

[JB]

Re: 1981 Evinrude 150hp to 200hp?

Not true, irdir.<br /><br />All JohnnyRudes have been rated at the prop since 1985.

 

[irdir]

Re: 1981 Evinrude 150hp to 200hp?

Yeah, but the engine is a 1981. It's before they started to rate hp at the prop. But is the rest of that statement true about the carbs? Thanks

 

[phatmanmike]

Re: 1981 Evinrude 150hp to 200hp?

yes, what you heard is absolutely true.<br /><br />all you need is bigger carbs and your mmotor is a 200hp.<br /><br />me and you are the only ones that know this secret , so keep it hush hush , will ya !?!<br /><br />i once had a 9.9 evinrude and i put carbs on from a 48spl and had it on a dyno and it pushed a total of 36hp at 5400 rpm. wowsers

 

[JB]

Re: 1981 Evinrude 150hp to 200hp?

<br /><br />Whachasmokin, Mike? Howjaget big twin carbs on a 9.9?

 

[Dhadley]

Re: 1981 Evinrude 150hp to 200hp?

Actually the blocks are the same casting but the porting is different. The 150/175 crossflow has the same porting but the 200 crossflow is different. Some 150 XP/GT's had porting real close to the 200 cf and used different heads. <br /><br />They use the same bore, stroke, pistons, rods, crank, ignition, intake manifold, reeds, exhaust manifold, midsection and gearcase including gear ratio. Walleyehed is experiminting with this concept as we speak.<br /><br />All the 235, 2.6 liter 175 and 2.6 XP/GT blocks are different.<br /><br />This is why foklks can be real disapointed when going from a 150 cf to a 200 cf. We've run 150's and 200 cf's on the Dusky and only see very minimal, is any, difference. Now, a 60* 150 looper is a whole different story!

 

[paul5]

Re: 1981 Evinrude 150hp to 200hp?

i have a 1991 140 looper , do you know what carbs i can use to boost me . paul uk