Difference between Mercury 30hp and 40hp

marcus507

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Jun 11, 2005
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I have a Mercury 30hp Four Stroke and I was wondering what the difference between the 40hp and the 30hp motor, from the specifications on their website, the enginges of both motors are identical. I was wondering where the extra horsepowers come from on the 40hp motor. Can anything can be modified on the 30hp engine to give it 10 extra horsepowers, and if so how much would it cost?<br /><br />Thanks
 
G

Guest

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Re: Difference between Mercury 30hp and 40hp

I've been wondering the same thing. I also noticed the 40 looks like it has a taller profile. Is that right?
 

marcus507

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Jun 11, 2005
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Re: Difference between Mercury 30hp and 40hp

Its possible, i thought they looked pretty much the same size, so i checked the specifications which turned out identical, so there has to be something which is not written in the specifications that gives the 40hp more power.
 

05GlastronSX

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May 29, 2005
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Re: Difference between Mercury 30hp and 40hp

its the same thing with the 2-stroke carb 150 xr6 and the 200 classic. they both use the same block, have the same bore and stroke, and even weigh the same. my guess is that they added some more non-restrictive parts to the 200 to get the extra 50 h.p as they did with the 40 to get the extra 10 h.p.
 

marcus507

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Re: Difference between Mercury 30hp and 40hp

is it possible to derestrict the 30hp engine???
 

Moody Blue

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May 24, 2004
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Re: Difference between Mercury 30hp and 40hp

From what I understand they put different carbs on them. Blocks are the same. Same setup with 2 strokes. The 30,40 and 50 use the same block. I think with the 50 they also modify the exhaust system somehow.
 

marcus507

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Jun 11, 2005
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Re: Difference between Mercury 30hp and 40hp

is it possible to install a carb from the 40hp on to the 30hp? if so, where can i get one from?
 
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