TGMForum

Recent Posts

Forum Stats

Members
Stats
  • Total Posts: 1,939
  • Total Topics: 750
  • Online today: 22
  • Online ever: 275 (January 22, 2020, 07:39:54 PM)
Users Online
  • Users: 0
  • Guests: 23
  • Total: 23
Mountfield SP41 Petrol Lawnmower, Self-Propelled, 39cm cutting width, 123cc ST120 Autochoke petrol engine, Up to 250m², Includes 40L Grass Collector
Mountfield SP41 Petrol Lawnmower, Self-Propelled, 39cm cutting width, 123cc ST120 Autochoke petrol engine, Up to 250m², Includes 40L Grass Collector

Stihl br420

Started by Gregs mowing, November 29, 2023, 07:00:17 PM

Previous topic - Next topic
Go Down Pages1

Gregs mowing

November 29, 2023, 07:00:17 PM
Hi.
Got a 2019 Stihl br420. Starts fine but bogs down and doesn't run right. Often cuts out. Can run smoothly on half throttle lock on the choke lever.
Tried new carb. Same issue.
Wondering if it's plug or some filter or air leek?
Any help much appreciated as always.

Mick

#1
November 30, 2023, 03:15:27 PM
Could be any of those things to be honest.  or it could be Crank seal or crankcase air leak, fuel hose turned to putty, fuel filter, blocked exhaust or port etc.
My websites
TGMForum Youtube Channel Please subscribe https://www.youtube.com/@TGMForum
Guitarist Guild
Go Up Pages1
TGMF is a participant in the Amazon EU Associates Program. This affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to products on Amazon.