Probably the simplest way to do these is to get a parts manual for both
engines and compare the part numbers. I think at a minimum you are
looking at a new piston, camshaft, and carburetor. Maybe even a new
head. Buying a new 6 might prove cheaper.
JR





Arnold wrote:
Hello,

Does anybody know how to convert a Mercury 4hp 4 stroke into a 6 hp.
Motorbloc and cu are the same.
The WOT of the 6hp is approx. 1000 rpm more then the 4 hp.
Thanks for any help

arnold

On Wed, 23 Feb 2005 17:45:56 +0100, "Arnold"
wrote:

Hello,

Does anybody know how to convert a Mercury 4hp 4 stroke into a 6 hp.
Motorbloc and cu are the same.
The WOT of the 6hp is approx. 1000 rpm more then the 4 hp.
Thanks for any help

I had one of these on a small dingy, and mounted a Garrett turbo on
it. It made 65 hp, and would push that little dingy 80 mph. It was
always fun to watch the locals as I "fly" into the bay.

80 MPH on a "dingy"? Come on...