25hp Evinrude Not Enough Power

[shocker494]

I have a 2002 25hp Evinrude. The motor does not produce the same power as my 1996 25hp Evirude that I previously had on boat. Motor starts, runs, idles perfectly but does not seem to produce the same rpm as my 96( Sounds different).
I have checked throttle cable, gas is good as well as oil mix, tank hose and ball are good, new spark plugs. I hesitate to tear into carburetor because motor runs so well. Could motor run this well with a weak fuel pump ?? Anyone have any suggestions

 

[JB]

Re: 25hp Evinrude Not Enough Power

Ahoy, shocker.

:welcome:

You need to measure rpm on both, or at least the newer one. "Seems" is not quantifiable.

A different prop could produce all of the effects you mention.

 

[shocker494]

Re: 25hp Evinrude Not Enough Power

Thank you for reply. Prop sizes are the same as well as the pitch of the props. How would I measure RPM at full speed ?

 

[JB]

Re: 25hp Evinrude Not Enough Power

You would need a tachometer for that, Shocker. You might be able to rent/borrow a mini tach from your dealer. On second thought, comparing speed at WOT using a GPS could verify or contradict your impressions.

 

[orbanp]

Re: 25hp Evinrude Not Enough Power

You can get non-contact laser based hand held digital tachometers rather inexpensively, probably cheaper than renting.
Here is one example, but do look around the net, you might find another cheaper, or with other features that you would prefer: CyberTech Digital Photo Laser Tachometer Non Contact Tach: Amazon.com: Industrial & Scientific

Good luck, Peter