Advanced Search

The Green Industry's Resource Center

Old 08-21-2012, 10:06 PM
Drenhead Drenhead is offline
LawnSite Member
Join Date: May 2005
Location: Oklahoma
Posts: 1
Exmark Lazer Z HP dropping RPMs for no reason

I have an older Exmark Lazer Z HP that seems to be losing RPMs for no reason. It is from about 2001 - 2002 timeframe. The Engine is a 21hp kawasaki.

It will seem to be running just fine, then all of a sudden, the engine will sound like it is bogging down and the blades will start losing a bunch of rpms. This happens whether I'm going thru grass or not. It will sometimes do it whether the blades are engaged or not.

After a while of this, it will just pop back to full RPM and seem to run fine for a while, then it will do it again for no reason.

Could this be a fuel pump or fuel filter issue? I had it to the shop, but of course it wouldn't do it while they had it.

I appreciate any suggestions you can give.
Reply With Quote
Old 08-22-2012, 02:00 PM
tobylou8's Avatar
tobylou8 tobylou8 is offline
LawnSite Bronze Member
Join Date: Dec 2008
Posts: 1,797
You "might" have a head gasket leak. I had a similar problem on my "Toro"/Exmark and that fixed it. Only your mechanic will know for sure though.
Reply With Quote
Old 08-22-2012, 08:17 PM
piston slapper's Avatar
piston slapper piston slapper is offline
LawnSite Platinum Member
Join Date: Mar 2010
Location: Tampa Fl
Posts: 4,236
Loose connections on coils...maybe bad sparplug boots..maybe bad coils..
Posted via Mobile Device
Reply With Quote

Thread Tools
Display Modes

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

Forum Jump

Layout Style:

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
Copyright ©1998 - 2012, LawnSite.comô - Grand View Media
All times are GMT -4. The time now is 09:31 AM.

Page generated in 0.06279 seconds with 10 queries