Small Engines (Lawn Mowers, etc.)/Honda hrx lawnmower

Advertisement


Question
Honda hrx lawnmower. 11 years old. . Last year needed new carberator.  Started using ethanol free gas .  One year later it started blowing out blue smoke out exhaust. Oil level good. It is lunging...speeds up and slows down on its own.  
When I turned it off it backfired and shot fire out the exhaust.  Tried to crank it, 3 pulls, and crank rope broke.  What do you think is going on?, and is it worth fixing or should I just buy a new one?   And what is your opinion of ethanol free gas....my last repair shop reccomended it. (Which I've been using).
Thanks for your thoughts!!
Brian

Answer
My nephew recently had the same issues...replaced the carb, then the string broke, needed a new starter.

He ended up just getting a new mower.

Before replacing the mower, the surging does sound like a dirty carburetor.  However, you may need to to check the valves as well.

Some of those late model Honda GC series engine starters are pretty inexpensive, less then $30 delivered to your door.  But...if you have to replace the starter and carb again you may loose money in the long run if it does not run.

Did you check You Tube for videos on checking Honda lawnmower engine valves?

Forgot about the ethanol free fuel...the jury is still out.  I have a test engine I have been using with ethanol fuel.  No problems so far but I really want to let it sit over the winter to see if it will start next spring.  I will say that the ethanol is very bad for small engine carburetor parts.  The ethanol ruins the inlet needles/seat, gaskets and floats.  I would use the ethanol fuel for long term storage, more than 2 months.  If you use a lot of fuel I'd just use pump gas with fuel stabilizer.  I use stabilizer in all my mower fuel and use it in my motorcycle during the winter when it sits.

Eric

Small Engines (Lawn Mowers, etc.)

All Answers


Answers by Expert:


Ask Experts

Volunteer


Eric A. Jones

Expertise

Lawnmower Repair . Certified Master Service Technician from B&S. Have 23 years experience on B&S, Lawn Chief, Weed Eater, Echo, Peerless, Wheel Horse, Snapper, Atlas, MTD, McCulloch, Homelite and many other numerous brands. Specialize in electrical repair.

Experience

Born and raised in the midwest. Started tinkering with engines when I was about 14 on my Suzuki RM-80. I began lawn mower repair at a small hardware store. I knew absolutely nothing. I read lots of repair manuals and met an older fellow who taught me many lessons. I continued working on small engines through high school and paid my way through college working on mowers at the same hardware store. Decided to get away from the midwest and mower repair so I joined the Air Force. I repaired air traffic control electronic equipment and ended up in Hawaii where I got a part time job at Small Engine Clinic. I gained a lot of experience from the Small Engine Clinic and had a blast repairing small engines. I then took the Briggs and Stratton Master Service Technician test and earned my MST. I then traveled to Wisconsin where I attended the factory update training seminar and received formal training. Continued working on mowers part time as I completed 20 years of military. Retired from the military on a Friday and continued in the lawn and garden industry the next Monday.

Education/Credentials
MAS Aerospace Operations BA Mathematics AAS Electronic Communications AAS Electronic Technology

©2016 About.com. All rights reserved.