skip to main content

briggs model 28E707-0121-E1 goes thunk... thunk... thunk...

13 years ago

Hi,

My Murray riding mower 42544x8B has been running a bit rough for a few years. When I shut down, as the engine RPM slows, it makes some pretty scary THUNK, THUNK noises at the very end. I have checked the the blades are not hitting anything and also check that the stack pulley has not loosened up on me (it did a few years back). Full Disclosure: Last year my fuel inlet cutoff failed and allowed fuel to enter my crankcase. I may have run the engine at least one time before noticing (yes I failed to check the oil level before starting). That issue was addressed and I installed a fuel shutoff to prevent that from reoccurring.

Any ideas on the THUNKS? As always, Thank You!

Sort by:Oldest

Comments (2)

walt2002
13 years ago
Did not find that model number on my CD NOR on the B&S web site.

However, my guess is that it is the counter balance bushings. These fail with some regularity, gas in oil would certainly hasten their demise and they are not replaceable. You have to buy the entire counter balance ass'y BUT the eccentrics that they run on on the crankshaft likely contain half the wear and they are cast into the crankshaft so takes an new crankshaft. Since it is an obsolete engine, it isn't worth it, one day there will be a big bang then you will know what made the noise.

Walt Conner
0
rustyj14
13 years ago
Yes Sir! WAlt speaks words of wisdom! I can attest to that. I had the same problem with a much used engine, on an older lawn tractor.
0

Related Stories

HOUSEKEEPING The Best Way to Get Your Windows Spotlessly Clean

By Bonnie McCarthy

Learn the pros’ tips and tricks for cleaning windows and getting them streak-free

HOUSEKEEPING The Quick and Easy Way to Clean a Microwave

By Marianne Lipanovich

All you need is water and a couple of other natural ingredients to get your appliance sparkling and smelling fresh again

HOUSEKEEPING What's That Sound? 9 Home Noises and How to Fix Them

By Mitchell Parker

Bumps and thumps might be driving you crazy, but they also might mean big trouble. We give you the lowdown and which pro to call for help

FEEL-GOOD HOME 8 Tips for Harmony in the Kitchen

By Laura Gaskill

Frustrated by the arguments that arise over kitchen duties? Check out these coping strategies

WORKING WITH PROS Working With Pros: When You Just Need a Little Design Guidance

By Judith Taylor Designs

Save money with a design consultation for the big picture or specific details

FUN HOUZZ How to Throw a Party Like You’re Prince

By Becky Harris

Get a royal groove on at home by following in the footsteps of The Purple One

HOUZZ TV Houzz TV: Cool Reclaimed Wood Projects Fill a Craftsman’s Home

By Mitchell Parker

Using barn wood, beadboard and beams, this homeowner has crafted furnishings and features for his family’s Chicago home

BATHROOM DESIGN The Funniest Bathrooms on Houzz

By Becky Harris

Check out these creative loos for a chuckle, then share your own fun bathroom designs

EVENTS 6 Must-See Homes From the L.A. Beach Cities Modern Home Tour

By Stacy Briscoe

From a home that mimics life on a boat to an updated beach bungalow, these modern houses capture what L.A. coastal living is all about

Sponsored

More Discussions

can anyone identify these bugs?

1

Custom zero turn mower bag attachment

0

Looking for cordless walk behind trimmer

2

Looking for edger with blade

0

Ill conceived mowing?

8