Exmark runs well for 30 min, then sputters - Lawn Mower Forums : Lawnmower Reviews, Repair, Pricing and Discussion Forum
ZTR and Commercial As the lawns get bigger, so do the machines used to keep them looking good!

LinkBack Thread Tools
post #1 of 3 (permalink) Old 10-14-2019, 07:31 PM Thread Starter
Junior Member
Join Date: Oct 2019
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Exmark runs well for 30 min, then sputters

I've got a 2006 Exmark Lazer Z LHP with the Kawasaki FH580V AS29.

The mower will run well for thirty minutes and cuts well. After thirty minutes it starts to sputter, then if medium to heavy load is put on the engine it'll die. In other words, after that thirty minute interval, if I engage the blades, it dies; if I push the handles more than 25% forward, it dies. It'll go forward if I go really, really slow. It'll idle ok for a while, but eventually dies.

Here's what I've done for repairs:
- replaced with fresh gas, twice: once with ethanol free, once with high octane (at advice of a mechanic)
- cleaned carburetor and replaced gaskets
- replaced both ignition coils with OEM coils
- replaced both spark plugs, making sure gapped properly

I want to avoid taking the mower to a mechanic as I feel I can do most repairs on my own.

Any advice as to why the mower will run perfectly for 30 minutes then die?


JosephP is offline  
Sponsored Links
post #2 of 3 (permalink) Old 07-30-2020, 12:58 PM
Junior Member
Join Date: Aug 2018
Posts: 4
Thanks: 0
Thanked 1 Time in 1 Post
Sounds like a fuel problem to me.

Did you:

Replace fuel filter?
Replace fuel lines?
Rebuild carb or just spray it out?

Any one of those parts might be your problem.
ttener is offline  
post #3 of 3 (permalink) Old 07-30-2020, 02:12 PM
Senior Member
Join Date: Oct 2018
Posts: 115
Thanks: 27
Thanked 6 Times in 5 Posts
Gas cap vent plugged? Just had this problem on a friend's Personal Pace.
Joe Kuhn is online now  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Lawn Mower Forums : Lawnmower Reviews, Repair, Pricing and Discussion Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

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 On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome