PLEASE HELP -- Ferris ISZ Power Loss


Old 06-09-08, 07:35 AM
Thread Starter
Join Date: Jun 2008
Posts: 1
PLEASE HELP -- Ferris ISZ Power Loss

I need some help. I have an older Ferris ISZ 61" deck with a Kawasaki 23hp engine. What is happening is that after 5 minutes, when the engine has warmed up, of load (blades engaged) the power drops off significantly. To the point that the engine almost stalls. When I disengage the blades, the motor revs right back up. Also, the engine has developed a backfire when I back off the throttle. Here is what I have done so far:

1) Rebuilt the deck (New spindles, pulleys, spring, belt, blades)
2) Rebuilt the carburetor
3) New fuel pump
4) New battery
5) New electric clutch
6) New plugs
7) Good compression
8) New muffler
9) Good fuses
10) New fuel filter (Installed correctly)
11) New and correct air filter

From this point forward, I don't even know what to look at??

Could it be a sticking valve, dirt in the fuel system, clogged exhaust, a bad hydraulic pump????

Please HELP.

Sponsored Links
Old 06-09-08, 09:47 PM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 16,814
Sounds to me like it's not getting the fuel needed to bog into the load. You might spend some more time with the carb or put on a new one. Try choking it a little to see if that helps it take the load better. If so, the carb is the problem.
Old 06-10-08, 12:04 AM
Join Date: Mar 2006
Location: NE Wis / Paris France{ In France for now }
Posts: 4,808
I am leaning more to carbuator issue there either main jet is clogged up a little otherwise the govener is not set up right { that is possible }


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes