Small Engines (Lawn Mowers, etc.)/Mountfield petrol hand mower


Mounting Bolt Missing
Mounting Bolt Missing  

Mountfield RY120
Mountfield RY120  
Hi, I have a Mountfield mower and two of the engine mounting bolts are missing, one is loose and one is holding so the Engine with Blade is Jumping..
Looks like I need to take off the Underneath Deck Back and the  cover to get to tighten or replace these.
If this is so?, Could you tell me how I do this?.

I intend to restore the machine.

Many thanks, Malcolm

Yes, if there is a baffle or guard under the mower deck you will need to remove it to access the bolt holes to install new bolts.

Most mowers do not have anything you have to remove but a few self drive models require some dis-assembly of parts to access the engine bolts.

Are the engine bolt holes threaded to accept bolts?  Some are threaded but others engines you need to install a bolt through the hole and then install a nut on the bolt.


Small Engines (Lawn Mowers, etc.)

All Answers

Answers by Expert:

Ask Experts


Eric A. Jones


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.


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.

MAS Aerospace Operations BA Mathematics AAS Electronic Communications AAS Electronic Technology

©2017 All rights reserved.

[an error occurred while processing this directive]