Mercury Optimax motors

f_ast · 09-05-2008, 07:13 AM

Hey guys, wondering if any of you know the differences between the 75, 90 and 115 hp engines. They are all based off of the 1.5L block and looking to see if I am able to make my 2006 75hp a 90 or 115. My dealer tells me the 90 and 115 are closer than the 75 and 90, but he couldn't me the differences because he just didn't know.

Is there more involved than just computer and gearing or???? What is involved???

Looking for a little extra jam. 42mph just isn't isn't cutting it anymore on my Lund 1750 Outfitter ss anymore.

Any help would be useful.

Thanks

catalltheway · 09-09-2008, 09:50 PM

No idea.

I was just looking at a 115 4 Stroke Merc and was told 75, 90 and 115 are the exact same weight and packaging. I don't know how they squeeze 40 HP out of the same motor without any more weight and size

PhantomLord · 10-09-2008, 08:28 AM

Quote:

No idea.

I was just looking at a 115 4 Stroke Merc and was told 75, 90 and 115 are the exact same weight and packaging. I don't know how they squeeze 40 HP out of the same motor without any more weight and size[/b]

Simply through intake and fuel injection. The bigger air intake and fuel intake th more power you'll get. Same with my old 40 Mercury 4 cylinder. The 40, 50, 60 were the same motor/block. The only difference was carburations, they had bigger carbs as the hp increased. Except for the 60 had a little different gearing to accomadate more power.

bryonthefly · 02-28-2009, 08:17 PM

Anyone know of a shop that knows how to "tweak" the 1.5L Optimax motors to get the most out of them.

Playn · 02-28-2009, 10:07 PM

ou can probably get your question answered at scream and fly

bryonthefly · 03-01-2009, 08:42 AM

Quote:

ou can probably get your question answered at scream and fly[/b]

Thanks.

09-05-2008, 07:13 AM	#1 (permalink)
f_ast Super Advanced Member Join Date: Sep 2006 Posts: 1,835 Current Sled(s): '13 AC HighCountry 800 sp Previous Sled(s): 94 Puma, 95 EXT, 01 ZR800 LE, 05 F7, 09 XFire 800sp Location: Uxbridge Ontario Favorite Riding Area: The deep stuff 12-13 Mileage: 1000 11-12 Mileage: 500 10-11 Mileage: 1800 Age: 29 Riding Since: '93	Hey guys, wondering if any of you know the differences between the 75, 90 and 115 hp engines. They are all based off of the 1.5L block and looking to see if I am able to make my 2006 75hp a 90 or 115. My dealer tells me the 90 and 115 are closer than the 75 and 90, but he couldn't me the differences because he just didn't know. Is there more involved than just computer and gearing or???? What is involved??? Looking for a little extra jam. 42mph just isn't isn't cutting it anymore on my Lund 1750 Outfitter ss anymore. Any help would be useful. Thanks __________________ HORSEPOWER: If it doesn't scary you, you don't have enough!!! 2009 Xfire 800SP with: SLP Full pipe, D&D shim kit, Attitude fuel Controller, Dalton Adj. weight set to 74.5gr, Culter Gold primary spring, Doo Violet QRS secondary spring, WRP gauge cage, 2Cool Side-vents, custom boss high-rise, org,blk,wht camo Slydog race ski, custom painted a-arms, trimmed windscreen and a pocket full of nuts!!!!

09-09-2008, 09:50 PM	#2 (permalink)
catalltheway Super Advanced Member Join Date: Jan 2007 Posts: 2,326 Current Sled(s): 06 Xfire 700 Location: Chicago 12-13 Mileage: 1000 11-12 Mileage: 785 10-11 Mileage: 500 Age: 37 Riding Since: 1997	No idea. I was just looking at a 115 4 Stroke Merc and was told 75, 90 and 115 are the exact same weight and packaging. I don't know how they squeeze 40 HP out of the same motor without any more weight and size __________________ *SKOL SNOW*

02-28-2009, 08:17 PM	#4 (permalink)
bryonthefly Super Advanced Member Join Date: Nov 2005 Posts: 178	Anyone know of a shop that knows how to "tweak" the 1.5L Optimax motors to get the most out of them.

02-28-2009, 10:07 PM	#5 (permalink)
Playn Super Advanced Member Join Date: Feb 2003 Posts: 1,332 Location: Howell, MI & Nashville, TN Favorite Riding Area: Houghton Lake, Gaylord, UP	ou can probably get your question answered at scream and fly

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