Questionhello my problem with this is when you throttle up engine it looses power and cuts out.engine idles great.i have changed intake and exhaust valves changed coils ,plugs ,fuel pump & filter. still have same problem.
AnswerGlen
This sounds like a carburetor problem. Usually when the engine looses power in the load mode either the carburetor ports are blocked and dirty or the Governor is out of adjustment.
Here is a issue that Kawasaki had in our service bulletin.
Kawasaki has recently changed the carburetors
on the FH601V, FH641V, FH680V, FH721V from an
externally vented carburetor (Pic 1) to an internally
vented carburetor (Pic 2). Both of these carburetors
use different air filters, although the air filters look
identical except for the part number printed on them.
Carburetor Air Filter PN A/F Difference
1 Externally Vented 11013-7024 Calibrated to external vent carburetor
mixture
2 Internally Vented 11013-7027 Calibrated to internal vent carburetor mixture
If the 11013-7027 is installed on an external vent
carburetor, the engine will run extremely rich.
Because of incorrect part substitution, customers
may have installed the incorrect air filter, not
understanding the difference and cause running
problems. Kawasaki Action Kawasaki has added text to the tops of each air filter explaining which carburetor it should be used with.
Engine Model Engine Spec and Serial Number
FH601V, FH641V,
FH680V, FH721V
All engines are eligible because customers may have changed to
the incorrect air filter.
