Upgrade Kawi Engine from 23hp to the 25hp

[gps_jetskier]

Does anyone know what parts it takes (persumably carb parts) to convert a Kawi 23hp (FH680V) to a 25hp (FH721V). They're the same engine, but there's a couple changes to it to get the extra hp. I'd like to buy the parts for my Hustler Z and I can't find a deal that knows. Most don't even write me back. It just can't be that hard. I can't even get a number for Kawi.

[mowerconsultant]

From what I have read it is simply a carburetor change.
But... I am not a Kawasaki expert either....

[gps_jetskier]

Actually, I got a reply from Southland Engine Co., Inc.

They seem to think it's a different cam as well as a carb asmbly (internally vented carburetor). Changing the cam would be alot of work I'd think, but changing the carb wouldn't be the end of the world.

[pugs]

Go to Kawasaki's website and enter the parts lookup section. Compare the parts on a 23 to the parts on a 25.

They have both had external and internal vent carbs over the years so that isnt the difference. I think the Carb is the only main difference. Different size venturis and jets. Its probably a $250-300 part that you wont notice the difference. I would save it and upgrade on your next mower.

[OSDOTF]

The 25 also has an oil cooler between the block and the oil filter so it's obvious Kawasaki doesn't see this hop-up as "just a different carb." I think you'd be making some dangerous assumptions if you were to tweak your 23; take the earlier advice and save your money for your next mower.