Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 17-10-2010, 01:58   #31
Registered User
 
boris's Avatar

Join Date: Sep 2007
Boat: warwick 44
Posts: 108
I think you will need the new bigger carb to allow more air and fuel, so the motor will rev higher and thus allowing more power
__________________

__________________
boris is offline   Reply With Quote
Old 17-10-2010, 02:13   #32
Registered User
 
KillerBoo's Avatar

Join Date: Oct 2010
Location: Sweden
Boat: Maxi 77
Posts: 171
Images: 2
Quote:
Originally Posted by boris View Post
I think you will need the new bigger carb to allow more air and fuel, so the motor will rev higher and thus allowing more power
Being a 4-stroke, probably a new camshaft as well..
__________________

__________________
If there really is a God, he must be like me
KillerBoo is offline   Reply With Quote
Old 18-10-2010, 09:48   #33
Registered User

Join Date: May 2010
Posts: 4
Quote:
Originally Posted by kddunn View Post
I'm looking at doing the same thing to my 9.9 but was told it woudn't give any more power. Also it would seem to me that a new prop would be in order. Where did you find the Merc parts diagram?
Here's the link to the ones for my model:

Mercury Outboard Parts 2002 1010312Zd
__________________
elmcken is offline   Reply With Quote
Old 31-05-2011, 13:51   #34
Registered User

Join Date: May 2010
Posts: 4
Re: Converting 9.9 Merc Two-Stroke to 15hp

I finally did it. I changed the carburetor and adaptor plate(w/ exhaust tube). Got a 20% increase in top end speed. Now I just have to change the decals. If you do it too, make sure you buy a new adapter plate gasket and powerhead gasket because mine were fused to the metal. I recommend Mercuryperformance.com for their price and customer service.
__________________
elmcken is offline   Reply With Quote
Old 01-06-2011, 08:57   #35
Senior Cruiser
 
Blue Stocking's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: St. Georges, Bda
Boat: Rhodes Reliant 41ft
Posts: 4,115
Re: Converting 9.9 Merc Two-Stroke to 15hp

Don't change the decals. In the street racing world, you would have a "sleeper".
Make some bucks in the marina racing
__________________
so many projects--so little time !!
Blue Stocking is online now   Reply With Quote
Old 01-06-2011, 09:09   #36
Registered User

Join Date: Feb 2009
Posts: 1,848
Re: Converting 9.9 Merc Two-Stroke to 15hp

Do your research The ob builders often use the same block for a family of motors but often the porting in the block is different Compare the part number for the block as well. When I sold suzuki motors Their 3 cyl 25 hp motor was excatly the same as the 30hp but with a throttle stop on the carbs to limit throttle opening
__________________

__________________
motion30 is offline   Reply With Quote
Reply

Tags
2 stroke

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
OMC 2-Cylinder 15hp 2-Stroke Sail Drive Engine Van Engines and Propulsion Systems 7 17-04-2010 07:19
Shear Pin in 2-Stroke 15hp Yamaha Outboard... beachgirl1952 Propellers & Drive Systems 3 18-01-2010 16:35
2 stroke vs 4 stroke? Shaft length? Piper'sGirl Engines and Propulsion Systems 6 06-06-2008 15:08
4-Stroke vs. 2-Stroke Outboards The_PIRATE Engines and Propulsion Systems 17 05-10-2007 05:37
Yanah 15HP vs. Tohatsu 18HP (2-Stroke OB) The_PIRATE Engines and Propulsion Systems 2 28-08-2007 13:34



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:11.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.