1994-2002 2 stroke 2 cyl 30/40 hp...what makes the 30 hp a 40 hp?

[alanfox55]

When I look at the service manual for these motors it looks like the only difference is the reeds. Does that mean that all I have to do is change the reeds on my 30 hp to make it a 40 hp?

 

[alanfox55]

Re: 1994-2002 2 stroke 2 cyl 30/40 hp...what makes the 30 hp a 40 hp?

By the way I'm referring to a Mercury motor.

 

[jimmbo]

Re: 1994-2002 2 stroke 2 cyl 30/40 hp...what makes the 30 hp a 40 hp?

Reeds might be part of it. Porting, exhaust tuning, and carburator could also be different. Compare parts manuals for the two engines to see what changes

 

[alanfox55]

Re: 1994-2002 2 stroke 2 cyl 30/40 hp...what makes the 30 hp a 40 hp?

Thanks