Earthquake tiller - Briggs and Stratton engine problems - - The Friendliest Tractor Forum and Best Place for Tractor Information
LinkBack Thread Tools Display Modes
post #1 of 1 Old 07-24-2018, 12:24 PM Thread Starter
MTF Junior Poster
Join Date: Jul 2018
Posts: 2
Earthquake tiller - Briggs and Stratton engine problems

Hello guys,
I recently purchased an Earthquake roto tiller, knowing it needed some carburetor work. When I purchased the tiller it ran, but needed about 7/8ths choke to stay running. I didnít think it would be a big deal to take care of the issue. A good carb cleaning and it would be back in business. Mind you this is a Briggs and Stratton 5 hp engine with the infamous pulsa jet carb mounted to the gas tank.

After I cleaned the carb up, and installed a new diaphram in the pump, I found that the engine ran better, but had a surging issue, except when the tiller was placed under a load. No load, the engine constantly surged. Applying a little choke smoothed things out. I suspected the carb still had debris in it somewhere. As time went on, the engine started running worse, requiring just as much choke to stay running as when I first purchased it.

Another strange problem I noticed was that after cleaning the carb and running the tiller for roughly 5 hours or so, the engine crankcase oil looked like it was becoming diluted with gasoline. I thought it was a fluke and the oil was simply not change from the provius owner, so I changed it.

At this time I also ordered a new carburetor off eBay, and although it was an aftermarket China replacement, I figured it would help take care of the problems. I installed the new carb, and with a fresh oil change, headed out to do some tilling. The engine ran great. I put about 2 hours of use on the tiller, and when I was done, I thought I would check the oil. To my surprise, it was overflowing, and once again diluted with gasoline.

Now Iím stumped. I donít understand how the gas is getting in the oil. This carb has no float or needle, which is the first place I would normally look for a problem. All I can think of now is that the gas tank cap is not venting, but if extra gas was being forced into the engine, I would expect it to run really rich and smoke black, which it doesnít do. Or is the engine just plain shot? This tiller looks like a low hour machine, and the engine has good compression, as far as I can tell.

Has anyone experienced problems like this with the pulsa jet carbs? This is my first experience with them.
Espeefan is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the - The Friendliest Tractor Forum and Best Place for Tractor Information 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:


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

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